Build sometimes throws a CRJAZ1247I error

Using :-

Jazz Build Engine as a windows service
Rational Team Concert 3.0.1

More often than not, the Jazz Build Engine will complete a build as required, however there are occasions that the build will fail after 20 seconds or so as it has failed to download the source files.

The error shows up as below in the Jazz Build Log. The file name changes per failed build, but the structure of the failure is the same.

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com.ibm.team.build.internal.scm.SourceControlUtility$2: Status ERROR: com.ibm.team.filesystem.client code=0 There were errors during download.  It is recommended that components be reloaded.  The reload will be incremental, loading only the missing items.  You can further reduce the reload time by reloading just the projects out of sync. null children=[Status ERROR: com.ibm.team.filesystem.client code=0 Failed to download <FILENAME>
com.ibm.team.repository.common.transport.TeamServiceException: CRJAZ1247I The request to the server failed.  The server returned the http error 500 with error text "Internal Server Error".  Examine any further details here or look in the server log files for more information on how to resolve the issue.]
 at com.ibm.team.build.internal.scm.SourceControlUtility.updateFileCopyArea(SourceControlUtility.java:625)
 at com.ibm.team.build.internal.engine.JazzScmPreBuildParticipant.preBuild(JazzScmPreBuildParticipant.java:238)
 at com.ibm.team.build.internal.engine.BuildLoop.invokePreBuildParticipants(BuildLoop.java:844)
 at com.ibm.team.build.internal.engine.BuildLoop$2.run(BuildLoop.java:650)
 at java.lang.Thread.run(Thread.java:619)
Contains : 0 Failed to download <FILENAME>
com.ibm.team.repository.common.transport.TeamServiceException: CRJAZ1247I The request to the server failed.  The server returned the http error 500 with error text "Internal Server Error".  Examine any further details here or look in the server log files for more information on how to resolve the issue.
 at com.ibm.team.repository.transport.client.ClientHttpUtil.throwHttpClientError(ClientHttpUtil.java:1267)
 at com.ibm.team.repository.transport.client.ClientHttpUtil.executeHttpMethod(ClientHttpUtil.java:471)
 at com.ibm.team.repository.transport.client.ClientHttpUtil.executeHttpMethod(ClientHttpUtil.java:290)
 at com.ibm.team.repository.transport.client.ClientHttpUtil.executeHttpMethod(ClientHttpUtil.java:204)
 at com.ibm.team.scm.client.content.BasicVersionedContentManager.executeMethod(BasicVersionedContentManager.java:446)
 at com.ibm.team.scm.client.content.BasicVersionedContentManager.invokeContentGet(BasicVersionedContentManager.java:1230)
 at com.ibm.team.scm.client.content.BasicVersionedContentManager$6.run(BasicVersionedContentManager.java:1006)
 at com.ibm.team.scm.client.content.BasicVersionedContentManager$6.run(BasicVersionedContentManager.java:1)
 at com.ibm.team.repository.client.internal.TeamRepository$3.run(TeamRepository.java:1261)
 at com.ibm.team.repository.common.transport.CancelableCaller.call(CancelableCaller.java:79)
 at com.ibm.team.repository.client.internal.TeamRepository.callCancelableService(TeamRepository.java:1254)
 at com.ibm.team.scm.client.internal.ScmClientLibraryContext.callCancelableService(ScmClientLibraryContext.java:70)
 at com.ibm.team.scm.client.content.BasicVersionedContentManager.internalRetrieveContentStream(BasicVersionedContentManager.java:997)
 at com.ibm.team.filesystem.client.internal.content.FileContentManager.internalRetrieveContentStream(FileContentManager.java:90)
 at com.ibm.team.filesystem.client.internal.content.FileContentManager.internalRetrieveContentStream(FileContentManager.java:1)
 at com.ibm.team.scm.client.content.BasicVersionedContentManager.retrieveContentStream(BasicVersionedContentManager.java:978)
 at com.ibm.team.scm.client.content.BasicAsyncVersionedContentManagerSession.getInputStream(BasicAsyncVersionedContentManagerSession.java:88)
 at com.ibm.team.scm.client.content.BasicAsyncVersionedContentManagerSession.internalDoRetrieveContent(BasicAsyncVersionedContentManagerSession.java:108)
 at com.ibm.team.scm.client.content.BasicAsyncVersionedContentManagerSession$1.run(BasicAsyncVersionedContentManagerSession.java:190)
 at com.ibm.team.repository.client.util.ThreadPool$PoolJob.run(ThreadPool.java:129)
 at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Caused by: com.ibm.team.repository.common.TeamRepositoryException: HTTP/1.1 500 Internal Server Error
Server: Apache-Coyote/1.1
Content-Type: text/html;charset=utf-8
Content-Length: 2754
Date: Wed, 11 Dec 2013 06:47:32 GMT
Connection: close

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