Bug 335850

Description Tim 2011-01-31 09:55:36 EST

Build Identifier: 20100218-1602

Hi,

we have the BIRT report engine embedded in our RCP application. Our customers are facing random errors:

java.lang.OutOfMemoryError: unable to create new native thread 
at java.lang.Thread.start0(Native Method)
at java.lang.Thread.start(Thread.java:597)
at org.eclipse.birt.data.engine.executor.DataSource$ShutdownListener.dataEngineShutdown(DataSource.java:92)
at org.eclipse.birt.data.engine.impl.DataEngineImpl.shutdown(DataEngineImpl.java:566)
at org.eclipse.birt.report.data.adapter.impl.DatRequestSessionImpl.shutdown(DataRequestSessionImpl.java:455)
at org.eclipse.birt.report.engine.data.dte.AbstractDataEngine.shutdown(AbstractDataEngine.java:348)
at org.eclipse.birt.report.engine.executor.ExecutionContext.closeDataEngine(ExecutionContext.java:874)
at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.doRun(RunAndRenderTask.java:175)
at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.run(RunAndRenderTask.java:75)
at de.micronova.exam.reportmanager.job.ExportPDFReportJob.run(ExportPDFReportJob.java:236)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

when running a report.
I had a short look into it and saw that hundreds of org.eclipse.birt.data.engine.executor.DataSource instances are created through org.eclipse.birt.data.engine.executor.DataSourceFactory.getDataSource(String, Map, DataEngineSession). Each of those instances registers a org.eclipse.birt.data.engine.executor.DataSource.ShutdownListener with the same instance of the org.eclipse.birt.data.engine.api.DataEngine.
When the engine finally is shut down, each of those listeners tries to create a new thread which sometimes produces the error above (heavily depends on timing - I wasn't able to reproduce the error but I saw that hundreds of shutdown listeners are being registered).
Is this a general issue or is it just us doing something wrong?

Cheers,
Tim

Few more facts:
Birt Version 2.5.2.v20090925-7l9V7YFT0z0-DX3kf8ShK8
We are using a scripted data source.
We are using the org.eclipse.birt.report.engine.api.IRunAndRenderTask to run/render the design.
Output format is PDF. 

Reproducible: Couldn't Reproduce