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  1. Camel
  2. CAMEL-11352

duplicated/missing logs when camel-paxlogging work with pax-logging-log4j2

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.17.6, 2.19.0
    • Fix Version/s: 2.19.1, 2.20.0
    • Component/s: None
    • Labels:
      None
    • Estimated Complexity:
      Unknown

      Description

      This problem is found after switch to the karaf 4.1.x, which using pax-logging-log4j2 insteadof pax-logging-service.

      I created a small test case project for reproduce this issue. https://github.com/xldai/test/tree/master/test-paxlogging-camel

      The findings from me is that, when PaxLoggingConsumer class [1] work together with pax-logging-service (karaf 4.0.x), it creates new threads to process the incoming PaxLoggingEvent and using MDC to filter the possible duplicated logs from PaxAppenderProxy class [2].

      but when PaxLoggingConsumer class work together with pax-logging-log4j2, the multi thread mechanism for processing the PaxLoggingEvent will lead to duplicated/missing logs output to the camel Exchange.

      Since the L63 from [3] fixed the possible duplicated logs come from PaxAppenderProxy class, I found that the multi thread mechanism and MDC checking can be removed from PaxLoggingConsumer class, then it works again as expected from my test result.

      [1] https://github.com/apache/camel/blob/master/components/camel-paxlogging/src/main/java/org/apache/camel/component/paxlogging/PaxLoggingConsumer.java#L58
      [2] https://github.com/ops4j/org.ops4j.pax.logging/blob/logging-1.9.1/pax-logging-service/src/main/java/org/ops4j/pax/logging/service/internal/PaxAppenderProxy.java#L63
      [3] https://github.com/ops4j/org.ops4j.pax.logging/blob/logging-1.9.1/pax-logging-log4j2/src/main/java/org/ops4j/pax/logging/log4j2/internal/PaxAppenderProxy.java#L63

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              • Assignee:
                davsclaus Claus Ibsen
                Reporter:
                xldai Xilai Dai
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                • Created:
                  Updated:
                  Resolved: