[jira] [Created] (CAMEL-11352) duplicated/missing logs when camel-paxlogging work with pax-logging-log4j2

["Xilai Dai (JIRA)" <ji...@apache.org>]

Xilai Dai created CAMEL-11352:
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             Summary: duplicated/missing logs when camel-paxlogging work with pax-logging-log4j2
                 Key: CAMEL-11352
                 URL: https://issues.apache.org/jira/browse/CAMEL-11352
             Project: Camel
          Issue Type: Bug
    Affects Versions: 2.19.0, 2.17.6
            Reporter: Xilai Dai


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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