How to add javax.activation.DataSource to App Engine devserver?What is the replacement for javax.activation package in java 9?java.lang.NoClassDefFoundError: javax/activation/DataSource on wsimport Intellij java 9NoClassDefFoundError: javax/activation/DataSourceMigration to JDK 11 has error occure “java.lang.NoClassDefFoundError: javax/activation/DataSource” (tomcat 9.0.12)java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.isAsyncStartedDeployment error after upgrading to java8 (GAE Standard Environment)auth for local dev server doesn't workNoClassDefFoundError when running server - GoogleAppEngine/MavenSOLR7 error parsing word documentGetting error when adding second domain in JScapeDeploying intellij maven project to azure web apps using FTP, getting a 500 server errorObjectifyService.begin() throws IllegalStateExceptionDatastoreException throws Non-protobuf error! Problem accessing IDproject:commit
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How to add javax.activation.DataSource to App Engine devserver?
What is the replacement for javax.activation package in java 9?java.lang.NoClassDefFoundError: javax/activation/DataSource on wsimport Intellij java 9NoClassDefFoundError: javax/activation/DataSourceMigration to JDK 11 has error occure “java.lang.NoClassDefFoundError: javax/activation/DataSource” (tomcat 9.0.12)java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.isAsyncStartedDeployment error after upgrading to java8 (GAE Standard Environment)auth for local dev server doesn't workNoClassDefFoundError when running server - GoogleAppEngine/MavenSOLR7 error parsing word documentGetting error when adding second domain in JScapeDeploying intellij maven project to azure web apps using FTP, getting a 500 server errorObjectifyService.begin() throws IllegalStateExceptionDatastoreException throws Non-protobuf error! Problem accessing IDproject:commit
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tl;dr: How do I add the javax.activation.DataSource dependency to a server run through the App Engine Maven plugin?
I'm using the App Engine Maven plugin to deploy to a local App Engine server, and I'm trying to use the Blobstore API to upload a file. I'm using Java 11.
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>io.happycoding</groupId>
<artifactId>blobstore-test</artifactId>
<version>1</version>
<packaging>war</packaging>
<properties>
<!-- App Engine currently supports Java 8 -->
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<failOnMissingWebXml>false</failOnMissingWebXml>
</properties>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.taglibs</groupId>
<artifactId>taglibs-standard-spec</artifactId>
<version>1.2.5</version>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-1.0-sdk</artifactId>
<version>1.9.59</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>1.9.71</version>
</plugin>
</plugins>
</build>
</project>
index.jsp
<%@ page import="com.google.appengine.api.blobstore.BlobstoreServiceFactory" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
</head>
<body>
<form action="<%= BlobstoreServiceFactory.getBlobstoreService().createUploadUrl("/submit") %>"
method="POST"
enctype="multipart/form-data">
Enter some text:
<br/>
<textarea name="text"></textarea>
<br/>
Select a file:
<input type="file" name="image">
<br/>
<input type="submit" value="Submit">
</form>
</body>
</html>
SubmitServlet.java
package io.happycoding.servlets;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/submit")
public class SubmitServlet extends HttpServlet
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
System.out.println("data submitted");
Command to run the local server: mvn appengine:devserver
I can successfully run a local server, and I can see that the form is rendered correctly, including the Blobstore URL.
However, when I submit the form, I get this error:
java.lang.NoClassDefFoundError: javax/activation/DataSource
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.handleUpload(UploadBlobServlet.java:171)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.access$000(UploadBlobServlet.java:69)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet$1.run(UploadBlobServlet.java:115)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.doPost(UploadBlobServlet.java:112)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:867)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1623)
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:134)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:48)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.jetty9.StaticFileFilter.doFilter(StaticFileFilter.java:123)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.DevAppServerRequestLogFilter.doFilter(DevAppServerRequestLogFilter.java:44)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
at com.google.appengine.tools.development.jetty9.DevAppEngineWebAppContext.doScope(DevAppEngineWebAppContext.java:94)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at com.google.appengine.tools.development.jetty9.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:595)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.Server.handle(Server.java:502)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.ClassNotFoundException: javax.activation.DataSource
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
at com.google.appengine.tools.development.DevAppServerClassLoader.loadClass(DevAppServerClassLoader.java:108)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 57 more
Some Googling reveals quite a few questions about this problem:
- Migration to JDK 11 has error occure “java.lang.NoClassDefFoundError: javax/activation/DataSource”
- java.lang.NoClassDefFoundError: javax/activation/DataSource on wsimport Intellij java 9
- What is the replacement for javax.activation package in java 9?
- NoClassDefFoundError: javax/activation/DataSource
The answers to these questions suggest adding a combination of these dependencies:
<dependency>
<groupId>javax.activation</groupId>
<artifactId>javax.activation-api</artifactId>
<version>1.2.0</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>com.sun.activation</groupId>
<artifactId>javax.activation</artifactId>
<version>1.2.0</version>
</dependency>
I've tried adding each of these, and I've tried adding all of them. But no matter what, I still get the above error.
I understand why this is happening: Java 8 included the javax.activation.DataSource class, and it was subsequently removed. So since I'm using Java 11, that class is missing. But none of the dependencies I've tried so far seem to provide the missing class, possibly because I'm using the App Engine Maven plugin instead of running my own server?
How do I add this dependency to a project that uses the App Engine Maven plugin?
java maven google-app-engine blobstore appengine-maven-plugin
asked Mar 24 at 15:39
Kevin WorkmanKevin Workman
34.8k64374
add a comment |
tl;dr: How do I add the javax.activation.DataSource dependency to a server run through the App Engine Maven plugin?
I'm using the App Engine Maven plugin to deploy to a local App Engine server, and I'm trying to use the Blobstore API to upload a file. I'm using Java 11.
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>io.happycoding</groupId>
<artifactId>blobstore-test</artifactId>
<version>1</version>
<packaging>war</packaging>
<properties>
<!-- App Engine currently supports Java 8 -->
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<failOnMissingWebXml>false</failOnMissingWebXml>
</properties>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.taglibs</groupId>
<artifactId>taglibs-standard-spec</artifactId>
<version>1.2.5</version>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-1.0-sdk</artifactId>
<version>1.9.59</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>1.9.71</version>
</plugin>
</plugins>
</build>
</project>
index.jsp
<%@ page import="com.google.appengine.api.blobstore.BlobstoreServiceFactory" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
</head>
<body>
<form action="<%= BlobstoreServiceFactory.getBlobstoreService().createUploadUrl("/submit") %>"
method="POST"
enctype="multipart/form-data">
Enter some text:
<br/>
<textarea name="text"></textarea>
<br/>
Select a file:
<input type="file" name="image">
<br/>
<input type="submit" value="Submit">
</form>
</body>
</html>
SubmitServlet.java
package io.happycoding.servlets;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/submit")
public class SubmitServlet extends HttpServlet
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
System.out.println("data submitted");
Command to run the local server: mvn appengine:devserver
I can successfully run a local server, and I can see that the form is rendered correctly, including the Blobstore URL.
However, when I submit the form, I get this error:
java.lang.NoClassDefFoundError: javax/activation/DataSource
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.handleUpload(UploadBlobServlet.java:171)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.access$000(UploadBlobServlet.java:69)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet$1.run(UploadBlobServlet.java:115)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.doPost(UploadBlobServlet.java:112)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:867)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1623)
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:134)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:48)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.jetty9.StaticFileFilter.doFilter(StaticFileFilter.java:123)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.DevAppServerRequestLogFilter.doFilter(DevAppServerRequestLogFilter.java:44)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
at com.google.appengine.tools.development.jetty9.DevAppEngineWebAppContext.doScope(DevAppEngineWebAppContext.java:94)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at com.google.appengine.tools.development.jetty9.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:595)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.Server.handle(Server.java:502)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.ClassNotFoundException: javax.activation.DataSource
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
at com.google.appengine.tools.development.DevAppServerClassLoader.loadClass(DevAppServerClassLoader.java:108)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 57 more
Some Googling reveals quite a few questions about this problem:
- Migration to JDK 11 has error occure “java.lang.NoClassDefFoundError: javax/activation/DataSource”
- java.lang.NoClassDefFoundError: javax/activation/DataSource on wsimport Intellij java 9
- What is the replacement for javax.activation package in java 9?
- NoClassDefFoundError: javax/activation/DataSource
The answers to these questions suggest adding a combination of these dependencies:
<dependency>
<groupId>javax.activation</groupId>
<artifactId>javax.activation-api</artifactId>
<version>1.2.0</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>com.sun.activation</groupId>
<artifactId>javax.activation</artifactId>
<version>1.2.0</version>
</dependency>
I've tried adding each of these, and I've tried adding all of them. But no matter what, I still get the above error.
I understand why this is happening: Java 8 included the javax.activation.DataSource class, and it was subsequently removed. So since I'm using Java 11, that class is missing. But none of the dependencies I've tried so far seem to provide the missing class, possibly because I'm using the App Engine Maven plugin instead of running my own server?
How do I add this dependency to a project that uses the App Engine Maven plugin?
java maven google-app-engine blobstore appengine-maven-plugin
asked Mar 24 at 15:39
Kevin WorkmanKevin Workman
34.8k64374
add a comment |
tl;dr: How do I add the javax.activation.DataSource dependency to a server run through the App Engine Maven plugin?
I'm using the App Engine Maven plugin to deploy to a local App Engine server, and I'm trying to use the Blobstore API to upload a file. I'm using Java 11.
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>io.happycoding</groupId>
<artifactId>blobstore-test</artifactId>
<version>1</version>
<packaging>war</packaging>
<properties>
<!-- App Engine currently supports Java 8 -->
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<failOnMissingWebXml>false</failOnMissingWebXml>
</properties>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.taglibs</groupId>
<artifactId>taglibs-standard-spec</artifactId>
<version>1.2.5</version>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-1.0-sdk</artifactId>
<version>1.9.59</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>1.9.71</version>
</plugin>
</plugins>
</build>
</project>
index.jsp
<%@ page import="com.google.appengine.api.blobstore.BlobstoreServiceFactory" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
</head>
<body>
<form action="<%= BlobstoreServiceFactory.getBlobstoreService().createUploadUrl("/submit") %>"
method="POST"
enctype="multipart/form-data">
Enter some text:
<br/>
<textarea name="text"></textarea>
<br/>
Select a file:
<input type="file" name="image">
<br/>
<input type="submit" value="Submit">
</form>
</body>
</html>
SubmitServlet.java
package io.happycoding.servlets;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/submit")
public class SubmitServlet extends HttpServlet
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
System.out.println("data submitted");
Command to run the local server: mvn appengine:devserver
I can successfully run a local server, and I can see that the form is rendered correctly, including the Blobstore URL.
However, when I submit the form, I get this error:
java.lang.NoClassDefFoundError: javax/activation/DataSource
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.handleUpload(UploadBlobServlet.java:171)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.access$000(UploadBlobServlet.java:69)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet$1.run(UploadBlobServlet.java:115)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.doPost(UploadBlobServlet.java:112)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:867)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1623)
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:134)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:48)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.jetty9.StaticFileFilter.doFilter(StaticFileFilter.java:123)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.DevAppServerRequestLogFilter.doFilter(DevAppServerRequestLogFilter.java:44)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
at com.google.appengine.tools.development.jetty9.DevAppEngineWebAppContext.doScope(DevAppEngineWebAppContext.java:94)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at com.google.appengine.tools.development.jetty9.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:595)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.Server.handle(Server.java:502)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.ClassNotFoundException: javax.activation.DataSource
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
at com.google.appengine.tools.development.DevAppServerClassLoader.loadClass(DevAppServerClassLoader.java:108)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 57 more
Some Googling reveals quite a few questions about this problem:
- Migration to JDK 11 has error occure “java.lang.NoClassDefFoundError: javax/activation/DataSource”
- java.lang.NoClassDefFoundError: javax/activation/DataSource on wsimport Intellij java 9
- What is the replacement for javax.activation package in java 9?
- NoClassDefFoundError: javax/activation/DataSource
The answers to these questions suggest adding a combination of these dependencies:
<dependency>
<groupId>javax.activation</groupId>
<artifactId>javax.activation-api</artifactId>
<version>1.2.0</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>com.sun.activation</groupId>
<artifactId>javax.activation</artifactId>
<version>1.2.0</version>
</dependency>
I've tried adding each of these, and I've tried adding all of them. But no matter what, I still get the above error.
I understand why this is happening: Java 8 included the javax.activation.DataSource class, and it was subsequently removed. So since I'm using Java 11, that class is missing. But none of the dependencies I've tried so far seem to provide the missing class, possibly because I'm using the App Engine Maven plugin instead of running my own server?
How do I add this dependency to a project that uses the App Engine Maven plugin?
java maven google-app-engine blobstore appengine-maven-plugin
asked Mar 24 at 15:39
Kevin WorkmanKevin Workman
34.8k64374
tl;dr: How do I add the javax.activation.DataSource dependency to a server run through the App Engine Maven plugin?
I'm using the App Engine Maven plugin to deploy to a local App Engine server, and I'm trying to use the Blobstore API to upload a file. I'm using Java 11.
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>io.happycoding</groupId>
<artifactId>blobstore-test</artifactId>
<version>1</version>
<packaging>war</packaging>
<properties>
<!-- App Engine currently supports Java 8 -->
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<failOnMissingWebXml>false</failOnMissingWebXml>
</properties>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.taglibs</groupId>
<artifactId>taglibs-standard-spec</artifactId>
<version>1.2.5</version>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-1.0-sdk</artifactId>
<version>1.9.59</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>1.9.71</version>
</plugin>
</plugins>
</build>
</project>
index.jsp
<%@ page import="com.google.appengine.api.blobstore.BlobstoreServiceFactory" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
</head>
<body>
<form action="<%= BlobstoreServiceFactory.getBlobstoreService().createUploadUrl("/submit") %>"
method="POST"
enctype="multipart/form-data">
Enter some text:
<br/>
<textarea name="text"></textarea>
<br/>
Select a file:
<input type="file" name="image">
<br/>
<input type="submit" value="Submit">
</form>
</body>
</html>
SubmitServlet.java
package io.happycoding.servlets;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/submit")
public class SubmitServlet extends HttpServlet
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
System.out.println("data submitted");
Command to run the local server: mvn appengine:devserver
I can successfully run a local server, and I can see that the form is rendered correctly, including the Blobstore URL.
However, when I submit the form, I get this error:
java.lang.NoClassDefFoundError: javax/activation/DataSource
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.handleUpload(UploadBlobServlet.java:171)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.access$000(UploadBlobServlet.java:69)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet$1.run(UploadBlobServlet.java:115)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at com.google.appengine.api.blobstore.dev.UploadBlobServlet.doPost(UploadBlobServlet.java:112)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:867)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1623)
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:134)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:48)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.jetty9.StaticFileFilter.doFilter(StaticFileFilter.java:123)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1610)
at com.google.appengine.tools.development.DevAppServerRequestLogFilter.doFilter(DevAppServerRequestLogFilter.java:44)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
at com.google.appengine.tools.development.jetty9.DevAppEngineWebAppContext.doScope(DevAppEngineWebAppContext.java:94)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at com.google.appengine.tools.development.jetty9.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:595)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.Server.handle(Server.java:502)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.ClassNotFoundException: javax.activation.DataSource
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
at com.google.appengine.tools.development.DevAppServerClassLoader.loadClass(DevAppServerClassLoader.java:108)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 57 more
Some Googling reveals quite a few questions about this problem:
- Migration to JDK 11 has error occure “java.lang.NoClassDefFoundError: javax/activation/DataSource”
- java.lang.NoClassDefFoundError: javax/activation/DataSource on wsimport Intellij java 9
- What is the replacement for javax.activation package in java 9?
- NoClassDefFoundError: javax/activation/DataSource
The answers to these questions suggest adding a combination of these dependencies:
<dependency>
<groupId>javax.activation</groupId>
<artifactId>javax.activation-api</artifactId>
<version>1.2.0</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>com.sun.activation</groupId>
<artifactId>javax.activation</artifactId>
<version>1.2.0</version>
</dependency>
I've tried adding each of these, and I've tried adding all of them. But no matter what, I still get the above error.
I understand why this is happening: Java 8 included the javax.activation.DataSource class, and it was subsequently removed. So since I'm using Java 11, that class is missing. But none of the dependencies I've tried so far seem to provide the missing class, possibly because I'm using the App Engine Maven plugin instead of running my own server?
How do I add this dependency to a project that uses the App Engine Maven plugin?
java maven google-app-engine blobstore appengine-maven-plugin
java maven google-app-engine blobstore appengine-maven-plugin
asked Mar 24 at 15:39
Kevin WorkmanKevin Workman
34.8k64374
asked Mar 24 at 15:39
Kevin WorkmanKevin Workman
34.8k64374
asked Mar 24 at 15:39
Kevin WorkmanKevin Workman
34.8k64374
asked Mar 24 at 15:39
Kevin WorkmanKevin Workman
34.8k64374
asked Mar 24 at 15:39
Kevin WorkmanKevin Workman
34.8k64374
34.8k64374
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
Google App Engine doesn't support Java 11. It only supports Java 8.
answered Mar 28 at 4:16
Zack LaValleeZack LaVallee
896
Yes, I know that. I'm asking how I can deploy locally with a later version of Java. Is there some official documentation that says this is not supported?
– Kevin Workman
Mar 28 at 16:39
add a comment |
I'd first try adding
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
as you pointed out, but my expectation is that you're getting the NoClassDefFound error because the javax.activation classes aren't getting added to the war by maven. I still mostly do my jar/war/ear building with Ant for this very reason: more verbose, but less magic. If you look in your project's /target folder you should be able to see the war file: if you do a jar tf <warfile> you should be able to see all the jar files added to WEB-INF/lib, and this will tell you if it is adding the activation jar.
Looking at https://github.com/GoogleCloudPlatform/appengine-maven-plugin, the recommended sample includes this plugin:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<archiveClasses>true</archiveClasses>
</configuration>
</plugin>
before the appengine-maven-plugin entry in the build section of your pom. I'd put that in and then see if it properly builds the war.
answered Apr 2 at 14:52
FemiFemi
59.8k8101131
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Google App Engine doesn't support Java 11. It only supports Java 8.
answered Mar 28 at 4:16
Zack LaValleeZack LaVallee
896
Yes, I know that. I'm asking how I can deploy locally with a later version of Java. Is there some official documentation that says this is not supported?
– Kevin Workman
Mar 28 at 16:39
add a comment |
Google App Engine doesn't support Java 11. It only supports Java 8.
answered Mar 28 at 4:16
Zack LaValleeZack LaVallee
896
Yes, I know that. I'm asking how I can deploy locally with a later version of Java. Is there some official documentation that says this is not supported?
– Kevin Workman
Mar 28 at 16:39
add a comment |
Google App Engine doesn't support Java 11. It only supports Java 8.
answered Mar 28 at 4:16
Zack LaValleeZack LaVallee
896
Google App Engine doesn't support Java 11. It only supports Java 8.
answered Mar 28 at 4:16
Zack LaValleeZack LaVallee
896
answered Mar 28 at 4:16
Zack LaValleeZack LaVallee
896
answered Mar 28 at 4:16
Zack LaValleeZack LaVallee
896
answered Mar 28 at 4:16
Zack LaValleeZack LaVallee
896
896
Yes, I know that. I'm asking how I can deploy locally with a later version of Java. Is there some official documentation that says this is not supported?
– Kevin Workman
Mar 28 at 16:39
add a comment |
Yes, I know that. I'm asking how I can deploy locally with a later version of Java. Is there some official documentation that says this is not supported?
– Kevin Workman
Mar 28 at 16:39
Yes, I know that. I'm asking how I can deploy locally with a later version of Java. Is there some official documentation that says this is not supported?
– Kevin Workman
Mar 28 at 16:39
Yes, I know that. I'm asking how I can deploy locally with a later version of Java. Is there some official documentation that says this is not supported?
– Kevin Workman
Mar 28 at 16:39
add a comment |
I'd first try adding
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
as you pointed out, but my expectation is that you're getting the NoClassDefFound error because the javax.activation classes aren't getting added to the war by maven. I still mostly do my jar/war/ear building with Ant for this very reason: more verbose, but less magic. If you look in your project's /target folder you should be able to see the war file: if you do a jar tf <warfile> you should be able to see all the jar files added to WEB-INF/lib, and this will tell you if it is adding the activation jar.
Looking at https://github.com/GoogleCloudPlatform/appengine-maven-plugin, the recommended sample includes this plugin:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<archiveClasses>true</archiveClasses>
</configuration>
</plugin>
before the appengine-maven-plugin entry in the build section of your pom. I'd put that in and then see if it properly builds the war.
answered Apr 2 at 14:52
FemiFemi
59.8k8101131
add a comment |
I'd first try adding
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
as you pointed out, but my expectation is that you're getting the NoClassDefFound error because the javax.activation classes aren't getting added to the war by maven. I still mostly do my jar/war/ear building with Ant for this very reason: more verbose, but less magic. If you look in your project's /target folder you should be able to see the war file: if you do a jar tf <warfile> you should be able to see all the jar files added to WEB-INF/lib, and this will tell you if it is adding the activation jar.
Looking at https://github.com/GoogleCloudPlatform/appengine-maven-plugin, the recommended sample includes this plugin:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<archiveClasses>true</archiveClasses>
</configuration>
</plugin>
before the appengine-maven-plugin entry in the build section of your pom. I'd put that in and then see if it properly builds the war.
answered Apr 2 at 14:52
FemiFemi
59.8k8101131
add a comment |
I'd first try adding
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
as you pointed out, but my expectation is that you're getting the NoClassDefFound error because the javax.activation classes aren't getting added to the war by maven. I still mostly do my jar/war/ear building with Ant for this very reason: more verbose, but less magic. If you look in your project's /target folder you should be able to see the war file: if you do a jar tf <warfile> you should be able to see all the jar files added to WEB-INF/lib, and this will tell you if it is adding the activation jar.
Looking at https://github.com/GoogleCloudPlatform/appengine-maven-plugin, the recommended sample includes this plugin:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<archiveClasses>true</archiveClasses>
</configuration>
</plugin>
before the appengine-maven-plugin entry in the build section of your pom. I'd put that in and then see if it properly builds the war.
answered Apr 2 at 14:52
FemiFemi
59.8k8101131
I'd first try adding
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
as you pointed out, but my expectation is that you're getting the NoClassDefFound error because the javax.activation classes aren't getting added to the war by maven. I still mostly do my jar/war/ear building with Ant for this very reason: more verbose, but less magic. If you look in your project's /target folder you should be able to see the war file: if you do a jar tf <warfile> you should be able to see all the jar files added to WEB-INF/lib, and this will tell you if it is adding the activation jar.
Looking at https://github.com/GoogleCloudPlatform/appengine-maven-plugin, the recommended sample includes this plugin:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<archiveClasses>true</archiveClasses>
</configuration>
</plugin>
before the appengine-maven-plugin entry in the build section of your pom. I'd put that in and then see if it properly builds the war.
answered Apr 2 at 14:52
FemiFemi
59.8k8101131
answered Apr 2 at 14:52
FemiFemi
59.8k8101131
answered Apr 2 at 14:52
FemiFemi
59.8k8101131
answered Apr 2 at 14:52
FemiFemi
59.8k8101131
59.8k8101131
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