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  1. JBoss Enterprise Application Platform
  2. JBEAP-24481

[GSS](7.4.z) WFLY-17552 - MDC from 'default task' Thread copied to 'Batch Thread' on creation but not cleared

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: Major Major
    • 7.4.11.CR1, 7.4.11.GA
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    • Batch
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      In case there's a MDC set on the current thread that is initiating a batch job, on creation of a new Batch Thread this MDC is copied to the the new thread. This context is not being cleared at any stage.

      See the attached example project [^jberet-mdc-reproducer.zip].

      This is the output of the example project when limiting the batch thread-pool to 4 and calling the REST service 6 times:

      15:50:02,811 INFO  [org.jboss.gss.batch.Endpoint] (default task-1) Endpoint.start(); Thread: default task-1; MDC: {qwq=jberet-mdc-reproducer}
      15:50:02,849 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 1) readItem(); Thread: Batch Thread - 1; MDC: {qwq=jberet-mdc-reproducer}
      15:50:02,849 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 1) readItem(); Thread: Batch Thread - 1; MDC: {qwq=jberet-mdc-reproducer}
      15:50:02,849 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 1) readItem(); Thread: Batch Thread - 1; MDC: {qwq=jberet-mdc-reproducer}
      15:50:02,850 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 1) writeItems([A, B, C]); Thread: Batch Thread - 1; MDC: {qwq=jberet-mdc-reproducer}
      15:50:02,850 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 1) readItem(); Thread: Batch Thread - 1; MDC: {qwq=jberet-mdc-reproducer}
      15:50:03,846 INFO  [org.jboss.gss.batch.Endpoint] (default task-1) Endpoint.start(); Thread: default task-1; MDC: {sbo=jberet-mdc-reproducer}
      15:50:03,849 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 2) readItem(); Thread: Batch Thread - 2; MDC: {sbo=jberet-mdc-reproducer}
      15:50:03,849 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 2) readItem(); Thread: Batch Thread - 2; MDC: {sbo=jberet-mdc-reproducer}
      15:50:03,849 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 2) readItem(); Thread: Batch Thread - 2; MDC: {sbo=jberet-mdc-reproducer}
      15:50:03,849 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 2) writeItems([A, B, C]); Thread: Batch Thread - 2; MDC: {sbo=jberet-mdc-reproducer}
      15:50:03,849 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 2) readItem(); Thread: Batch Thread - 2; MDC: {sbo=jberet-mdc-reproducer}
      15:50:04,501 INFO  [org.jboss.gss.batch.Endpoint] (default task-1) Endpoint.start(); Thread: default task-1; MDC: {ynq=jberet-mdc-reproducer}
      15:50:04,504 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 3) readItem(); Thread: Batch Thread - 3; MDC: {ynq=jberet-mdc-reproducer}
      15:50:04,504 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 3) readItem(); Thread: Batch Thread - 3; MDC: {ynq=jberet-mdc-reproducer}
      15:50:04,504 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 3) readItem(); Thread: Batch Thread - 3; MDC: {ynq=jberet-mdc-reproducer}
      15:50:04,504 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 3) writeItems([A, B, C]); Thread: Batch Thread - 3; MDC: {ynq=jberet-mdc-reproducer}
      15:50:04,504 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 3) readItem(); Thread: Batch Thread - 3; MDC: {ynq=jberet-mdc-reproducer}
      15:50:05,150 INFO  [org.jboss.gss.batch.Endpoint] (default task-1) Endpoint.start(); Thread: default task-1; MDC: {zot=jberet-mdc-reproducer}
      15:50:05,154 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 4) readItem(); Thread: Batch Thread - 4; MDC: {zot=jberet-mdc-reproducer}
      15:50:05,154 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 4) readItem(); Thread: Batch Thread - 4; MDC: {zot=jberet-mdc-reproducer}
      15:50:05,154 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 4) readItem(); Thread: Batch Thread - 4; MDC: {zot=jberet-mdc-reproducer}
      15:50:05,154 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 4) writeItems([A, B, C]); Thread: Batch Thread - 4; MDC: {zot=jberet-mdc-reproducer}
      15:50:05,154 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 4) readItem(); Thread: Batch Thread - 4; MDC: {zot=jberet-mdc-reproducer}
      15:50:05,820 INFO  [org.jboss.gss.batch.Endpoint] (default task-1) Endpoint.start(); Thread: default task-1; MDC: {zhb=jberet-mdc-reproducer}
      15:50:05,822 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 1) readItem(); Thread: Batch Thread - 1; MDC: {qwq=jberet-mdc-reproducer}
      15:50:05,822 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 1) readItem(); Thread: Batch Thread - 1; MDC: {qwq=jberet-mdc-reproducer}
      15:50:05,822 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 1) readItem(); Thread: Batch Thread - 1; MDC: {qwq=jberet-mdc-reproducer}
      15:50:05,822 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 1) writeItems([A, B, C]); Thread: Batch Thread - 1; MDC: {qwq=jberet-mdc-reproducer}
      15:50:05,822 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 1) readItem(); Thread: Batch Thread - 1; MDC: {qwq=jberet-mdc-reproducer}
      15:50:06,569 INFO  [org.jboss.gss.batch.Endpoint] (default task-1) Endpoint.start(); Thread: default task-1; MDC: {ajc=jberet-mdc-reproducer}
      15:50:06,571 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 2) readItem(); Thread: Batch Thread - 2; MDC: {sbo=jberet-mdc-reproducer}
      15:50:06,571 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 2) readItem(); Thread: Batch Thread - 2; MDC: {sbo=jberet-mdc-reproducer}
      15:50:06,571 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 2) readItem(); Thread: Batch Thread - 2; MDC: {sbo=jberet-mdc-reproducer}
      15:50:06,571 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 2) writeItems([A, B, C]); Thread: Batch Thread - 2; MDC: {sbo=jberet-mdc-reproducer}
      15:50:06,572 INFO  [org.jboss.gss.batch.DummyReader] (Batch Thread - 2) readItem(); Thread: Batch Thread - 2; MDC: {sbo=jberet-mdc-reproducer}
      

              rchakrab Ranabir Chakraborty
              cfang@redhat.com Cheng Fang
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