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  1. WildFly
  2. WFLY-5023

Intermittent NPE when removing data sources

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Details

    • Bug
    • Resolution: Obsolete
    • Major
    • None
    • 10.0.0.Alpha6
    • JCA
    • None
    • Hide

      It is easy to reproduce it if you create and delete many data sources at once.
      Attaching two CLI scripts, one for adding 300 datasources, one for removing all of them.
      Run bin/jboss-cli.sh -c --file=many-datasources.cli and then bin/jboss-cli.sh -c --file=remove-datasources.cli and watch the server log.

      For 300 data sources, I get about 4 to 6 NPEs.

      Show
      It is easy to reproduce it if you create and delete many data sources at once. Attaching two CLI scripts, one for adding 300 datasources, one for removing all of them. Run bin/jboss-cli.sh -c --file=many-datasources.cli and then bin/jboss-cli.sh -c --file=remove-datasources.cli and watch the server log. For 300 data sources, I get about 4 to 6 NPEs.

    Description

      When removing a datasource, sporadically this exception appears in the log:

      12:49:58,224 WARN  [org.jboss.msc.service.fail] (MSC service thread 1-8) MSC000004: Failure during stop of service org.wildfly.data-source.ds51: java.lang.NullPointerException
	at org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService.stop(AbstractDataSourceService.java:161)
	at org.jboss.msc.service.ServiceControllerImpl$StopTask.stopService(ServiceControllerImpl.java:2056)
	at org.jboss.msc.service.ServiceControllerImpl$StopTask.run(ServiceControllerImpl.java:2017)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

      This doesn't seem to happen on WildFly 9.x, only on recent master.
      I suspect that this could lead to some resource leaks, but didn't study it further.

      From git history, it looks like this might be caused by the fix for https://issues.jboss.org/browse/WFLY-4429

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          is caused by

          Task - Represents a small unit of work that is not end-user facing. WFLY-4429 Refactor JCA subsystems

          • Critical - To be worked on immediately following BLOCKER issues.
          • Closed
          is cloned by

          Bug - A problem that impairs or prevents the functions of the product. JBEAP-534 Intermittent NPE when removing data sources

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Closed
          relates to

          Bug - A problem that impairs or prevents the functions of the product. WFLY-5030 Intermittent failure of deployment containing two datasources in -ds.xml

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Closed

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            People

              smaestri@redhat.com Stefano Maestri
              jmartisk@redhat.com Jan Martiska
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                Updated:
                Resolved: