Synchronisation issue when rootLogger is DEBUG and Karaf is started afresh
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Key: KARAF-986
URL: https://issues.apache.org/jira/browse/KARAF-986
Project: Karaf
Issue Type: Bug
Affects Versions: 2.2.4
Reporter: Raul Kripalani
When working in development mode, you will many times set your rootLogger's
level to DEBUG.
If you delete the $KARAF_HOME/data dir and start afresh while your rootLogger
remains on DEBUG, Karaf will likely block during bundle startup if you have
large number of boot features (e.g. ServiceMix) defined in the {{featuresBoot}}
property under {{org.apache.karaf.features.cfg}}.
Changing the log level back to INFO avoids the issue.
Looks like it only happens if a large number of threads is emitting log
statements simultaneously, as seen in [1] & [2]. Thread dump looks exactly the
same as the one submitted in [1].
Not sure if there's much we can do on the Karaf side of things, but I guess
it's worth raising.
[1] https://issues.apache.org/bugzilla/show_bug.cgi?id=50213
[2] https://issues.apache.org/bugzilla/show_bug.cgi?id=51047
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