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Subject: NullPointerException when building ant projects on remote build
 agent (continuum 1.3.2 beta)
From: Iain Jackson <iain.jackson@memex.com>
To: users@continuum.apache.org
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Date: Thu, 09 Apr 2009 18:18:31 +0100
Message-Id: <1239297511.1358.7.camel@mercury>
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For a project I work on we build it on a list of platforms, so I've been
looking at the using continuum's distributed builds to manage all these.
I've been playing with the beta to see how we could get this working.

The project is built using an ant script.

Looks like there is an issue when building ant projects on a remote
build agent.

I setup a master continuum server (Ubuntu 8.04) and a
build-agent (Solaris 10 SPARC). Ant and maven are installed on the build
agent and continuum server. 

When I build the project however, I get a NullPointerException in the
build agent's log when its checking whether to build it or not. I've
attached the log. 

Is there anything I can do to get round this? Or is this something that
will be fixed in a later release?

Thanks,

Iain

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2009-04-09 17:41:01,166 [btpool0-5] INFO  org.apache.continuum.distributed.transport.slave.SlaveBuildAgentTransportServer  - Building projects.
2009-04-09 17:41:01,167 [pool-2-thread-1] INFO  org.apache.continuum.buildagent.taskqueue.execution.PrepareBuildProjectsTaskExecutor  - Check scm root state
2009-04-09 17:41:01,167 [pool-2-thread-1] INFO  org.apache.continuum.buildagent.taskqueue.execution.PrepareBuildProjectsTaskExecutor  - Starting prepare build
2009-04-09 17:41:01,191 [pool-2-thread-1] INFO  org.apache.continuum.distributed.transport.master.MasterBuildAgentTransportClient  - Started prepare build
2009-04-09 17:41:01,191 [pool-2-thread-1] INFO  org.apache.continuum.buildagent.taskqueue.execution.PrepareBuildProjectsTaskExecutor  - Initializing prepare build
2009-04-09 17:41:01,192 [pool-2-thread-1] INFO  org.apache.continuum.buildagent.taskqueue.execution.PrepareBuildProjectsTaskExecutor  - Updating working directory
2009-04-09 17:41:01,192 [pool-2-thread-1] INFO  org.apache.continuum.buildagent.taskqueue.execution.PrepareBuildProjectsTaskExecutor  - Performing action check-agent-working-directory
2009-04-09 17:41:01,194 [pool-2-thread-1] INFO  org.apache.continuum.buildagent.taskqueue.execution.PrepareBuildProjectsTaskExecutor  - Performing action update-agent-working-directory
2009-04-09 17:41:01,194 [pool-2-thread-1] INFO  action#update-agent-working-directory  - Updating project: PROJECT-SOLARIS', id: '2' to '/opt/apache-continuum-buildagent-1.3.2/data/working-directory/2'.
2009-04-09 17:41:01,405 [pool-2-thread-1] INFO  scmManager  - Executing: /bin/sh -c cd /opt/apache-continuum-buildagent-1.3.2/data/working-directory/2 && svn --username autobuild --non-interactive update
2009-04-09 17:41:01,406 [pool-2-thread-1] INFO  scmManager  - Working directory: /opt/apache-continuum-buildagent-1.3.2/data/working-directory/2
2009-04-09 17:41:03,118 [pool-2-thread-1] INFO  org.apache.continuum.buildagent.taskqueue.execution.PrepareBuildProjectsTaskExecutor  - Performing action changelog-agent-project
2009-04-09 17:41:03,120 [pool-2-thread-1] INFO  action#changelog-agent-project  - Getting changeLog of project: PROJECT-SOLARIS
2009-04-09 17:41:03,180 [pool-2-thread-1] INFO  scmManager  - Executing: /bin/sh -c cd /opt/apache-continuum-buildagent-1.3.2/data/working-directory/2 && svn --username ######## --non-interactive log -v svn://#############
2009-04-09 17:41:03,182 [pool-2-thread-1] INFO  scmManager  - Working directory: /opt/apache-continuum-buildagent-1.3.2/data/working-directory/2
2009-04-09 17:41:03,891 [pool-2-thread-1] INFO  org.apache.continuum.buildagent.taskqueue.execution.PrepareBuildProjectsTaskExecutor  - Merging SCM results
2009-04-09 17:41:03,935 [pool-2-thread-1] INFO  org.apache.continuum.distributed.transport.master.MasterBuildAgentTransportClient  - Prepare build finished.
2009-04-09 17:41:03,936 [pool-2-thread-1] INFO  org.apache.continuum.buildagent.taskqueue.execution.PrepareBuildProjectsTaskExecutor  - Performing action create-agent-build-project-task
2009-04-09 17:41:03,938 [pool-1-thread-1] INFO  org.apache.continuum.buildagent.taskqueue.execution.BuildProjectTaskExecutor  - Initializing build
2009-04-09 17:41:03,984 [pool-1-thread-1] INFO  org.apache.continuum.distributed.transport.master.MasterBuildAgentTransportClient  - Retrieved environments
2009-04-09 17:41:03,985 [pool-1-thread-1] INFO  org.apache.continuum.buildagent.taskqueue.execution.BuildProjectTaskExecutor  - Checking if project 'PROJECT-SOLARIS' should build
2009-04-09 17:41:03,986 [Thread-15] ERROR taskQueueExecutor#build-agent  - Error executing task
edu.emory.mathcs.backport.java.util.concurrent.ExecutionException: java.lang.NullPointerException
	at edu.emory.mathcs.backport.java.util.concurrent.FutureTask.getResult(FutureTask.java:299)
	at edu.emory.mathcs.backport.java.util.concurrent.FutureTask.get(FutureTask.java:128)
	at org.codehaus.plexus.taskqueue.execution.ThreadedTaskQueueExecutor$ExecutorRunnable.waitForTask(ThreadedTaskQueueExecutor.java:165)
	at org.codehaus.plexus.taskqueue.execution.ThreadedTaskQueueExecutor$ExecutorRunnable.run(ThreadedTaskQueueExecutor.java:127)
Caused by: java.lang.NullPointerException
	at org.apache.continuum.buildagent.taskqueue.execution.BuildProjectTaskExecutor.getMavenProject(BuildProjectTaskExecutor.java:518)
	at org.apache.continuum.buildagent.taskqueue.execution.BuildProjectTaskExecutor.shouldBuild(BuildProjectTaskExecutor.java:406)
	at org.apache.continuum.buildagent.taskqueue.execution.BuildProjectTaskExecutor.executeTask(BuildProjectTaskExecutor.java:117)
	at org.codehaus.plexus.taskqueue.execution.ThreadedTaskQueueExecutor$ExecutorRunnable$1.run(ThreadedTaskQueueExecutor.java:116)
	at edu.emory.mathcs.backport.java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:442)
	at edu.emory.mathcs.backport.java.util.concurrent.FutureTask.run(FutureTask.java:176)
	at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:987)
	at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:528)
	at java.lang.Thread.run(Thread.java:619)

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