I'm trying to get an app engine maven project running and appear to have found myself in JAR hell. The project has built and run in the past without using maven, but I've had enough of Eclipse's nonsense and am trying to mavenize the project for all the usual reasons.
Currently everything is working compiling and tests are passing (with mvn clean install
from the myproject-war
directory shown here). I'm also able to launch mvn appengine:devserver
from my myproject-ear
directory and get the server running. Navigating to one of my servlets, however, I get the noSuchMethodError
trace shown below. (All code is at the bottom for readability).
This looks similar to other posts where jackson versions weren't in sync. However, my jackson versions seem to be ok, as can be seen in my pom.xml
, also at the bottom. It appears that that method didn't appear until Jackson 3.0, which again seems ok because of the output of mvn dependency:tree -Dverbose | ack jackson
and the fact that I'm depending on 2.4.1
.
The most likely culprit I can think of is the google library, which I'm using because I'm following the example here which appears to rely on it. However, I'm not really sure how to go about testing that hypothesis or getting the google library to work without its dependency. Perhaps the <exlcudes>
tag, but I'm not sure how I would apply it.
Does anyone have any suggestions or things I'm missing? How can I get the correct version of the class to be used at runtime? Or am I missing something and the solution is something entirely different?
EDIT: Note that on the advice of a comment/answer I have ensured that all of the libraries I am responsible for use the same version of fasterxml/Jackson rather than the older codehaus packaing. I agree that it appears that there is still an older dependency somewhere causing problems, but that is precisely the problem I am struggling to correct.
EDIT 2: I eventually got this working as I cleaned up the overall project and dependency structure, although I can't provide the exacty fix as to why. I think the issue was due to this dependency:
<dependency>
<groupId>com.fasterxml.jackson.jaxrs</groupId>
<artifactId>jackson-jaxrs-json-provider</artifactId>
<version>2.4.1</version>
</dependency>
It has a dependency on org.jboss.resteasy:resteasy-jackson2-provider:3.0.6.Final
, which itself depends on com.fasterxml.jackson.core:jackson-databind:2.2.1
, which doesn't have the missing method, as I pointed out in my original post.
mvn dependency:tree -Dverbose | ack jackson
:
[INFO] +- com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.4.1:compile
[INFO] | +- com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.4.1:compile
[INFO] | | +- (com.fasterxml.jackson.core:jackson-core:jar:2.4.1:compile - omitted for duplicate)
[INFO] | | \- (com.fasterxml.jackson.core:jackson-databind:jar:2.4.1:compile - omitted for duplicate)
[INFO] | +- (com.fasterxml.jackson.core:jackson-core:jar:2.4.1:compile - omitted for duplicate)
[INFO] | +- (com.fasterxml.jackson.core:jackson-databind:jar:2.4.1:compile - omitted for duplicate)
[INFO] | \- com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.4.1:compile
[INFO] | +- (com.fasterxml.jackson.core:jackson-core:jar:2.4.1:compile - omitted for duplicate)
[INFO] | \- (com.fasterxml.jackson.core:jackson-databind:jar:2.4.1:compile - omitted for duplicate)
[INFO] +- com.fasterxml.jackson.core:jackson-core:jar:2.4.1:compile
[INFO] +- com.fasterxml.jackson.core:jackson-databind:jar:2.4.1:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-annotations:jar:2.4.0:compile
[INFO] | \- (com.fasterxml.jackson.core:jackson-core:jar:2.4.1:compile - omitted for duplicate)
[INFO] | +- com.google.http-client:google-http-client-jackson2:jar:1.19.0:compile
[INFO] | | \- (com.fasterxml.jackson.core:jackson-core:jar:2.1.3:compile - omitted for conflict with 2.4.1)
[INFO] +- org.codehaus.jackson:jackson-mapper-asl:jar:1.9.13:test
[INFO] | \- org.codehaus.jackson:jackson-core-asl:jar:1.9.13:test
Exception trace:
java.lang.NoSuchMethodError: com.fasterxml.jackson.core.JsonFactory.requiresPropertyOrdering()Z
at com.fasterxml.jackson.databind.ObjectMapper.<init>(ObjectMapper.java:458)
at com.fasterxml.jackson.databind.ObjectMapper.<init>(ObjectMapper.java:379)
at com.fasterxml.jackson.jaxrs.json.JsonMapperConfigurator.getDefaultMapper(JsonMapperConfigurator.java:44)
at com.fasterxml.jackson.jaxrs.base.ProviderBase.locateMapper(ProviderBase.java:856)
at com.fasterxml.jackson.jaxrs.base.ProviderBase.writeTo(ProviderBase.java:588)
at org.jboss.resteasy.core.interception.AbstractWriterInterceptorContext.writeTo(AbstractWriterInterceptorContext.java:129)
at org.jboss.resteasy.core.interception.ServerWriterInterceptorContext.writeTo(ServerWriterInterceptorContext.java:62)
at org.jboss.resteasy.core.interception.AbstractWriterInterceptorContext.proceed(AbstractWriterInterceptorContext.java:118)
at org.jboss.resteasy.plugins.interceptors.encoding.GZIPEncodingInterceptor.aroundWriteTo(GZIPEncodingInterceptor.java:100)
at org.jboss.resteasy.core.interception.AbstractWriterInterceptorContext.proceed(AbstractWriterInterceptorContext.java:122)
at org.jboss.resteasy.core.ServerResponseWriter.writeNomapResponse(ServerResponseWriter.java:99)
at org.jboss.resteasy.core.SynchronousDispatcher.writeResponse(SynchronousDispatcher.java:427)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:376)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:179)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:220)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:127)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:491)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
My pom.xml
:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<groupId>org.mygroupid</groupId>
<artifactId>myproject-server-war</artifactId>
<parent>
<groupId>org.mygroupid</groupId>
<artifactId>myproject-server</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<properties>
<appengine.app.version>1-war</appengine.app.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<!-- Compile/runtime dependencies -->
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-1.0-sdk</artifactId>
<version>${appengine.target.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.31</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.jaxrs</groupId>
<artifactId>jackson-jaxrs-json-provider</artifactId>
<version>2.4.1</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.4.1</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.4.1</version>
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>2.3</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.2.8.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate.common</groupId>
<artifactId>hibernate-commons-annotations</artifactId>
<version>4.0.4.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>3.0.8.Final</version>
</dependency>
<dependency>
<groupId>com.google.api-client</groupId>
<artifactId>google-api-client</artifactId>
<version>1.19.0</version>
</dependency>
<dependency>
<groupId>com.google.api-client</groupId>
<artifactId>google-api-client-gson</artifactId>
<version>1.19.0</version>
</dependency>
<!-- Our custom common jar. -->
<dependency>
<groupId>groupid</groupId>
<artifactId>myproject-common</artifactId>
<version>0.1-SNAPSHOT</version>
</dependency>
<!-- Test Dependencies -->
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-testing</artifactId>
<version>${appengine.target.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-stubs</artifactId>
<version>${appengine.target.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.9.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>groupdId</groupId>
<artifactId>myproject-common</artifactId>
<version>0.1-SNAPSHOT</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.easytesting</groupId>
<artifactId>fest-assert-core</artifactId>
<version>2.0M10</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<outputDirectory>target/${project.artifactId}-${project.version}/WEB-INF/classes</outputDirectory>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<archiveClasses>true</archiveClasses>
<webResources>
<!-- in order to interpolate version from pom into appengine-web.xml -->
<resource>
<directory>${basedir}/src/main/webapp/WEB-INF</directory>
<filtering>true</filtering>
<targetPath>WEB-INF</targetPath>
</resource>
</webResources>
</configuration>
</plugin>
</plugins>
</build>
This is what is working for me with GAE 1.9.7
Properties
Dependency Management
Dependencies
Works for me :
First , check and remove any libraries with these names in your project:
because you may have some of them repeated in your java proyect ..
Second, go here http://mvnrepository.com/artifact/com.fasterxml.jackson.core and Download the 3 jars with this specific versions (that 28/04/2016 is the last version) :
Third, imports for your controller
and dont forget your Object with
-Rebuild/Redeploy(and debug because maybe you will get a different error and may confused with the previous one)