opendev/system-config
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Add info on running jstack against gerrit to docs

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This is meant to help debug gerrit in some circumstances particularly
now that the Java Melody plugin is not installed.

Change-Id: Ifedb7abd08c7fe1281ac510c6872fe8d9fe700a1
This commit is contained in:
Clark Boylan 2022-01-31 12:00:34 -08:00
parent 0520fc3856
commit bdeef4e4ce
1 changed files with 15 additions and 0 deletions
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doc/source/gerrit.rst
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@ -567,3 +567,18 @@ must follow that steps:
a change, you can delete them with following query::
delete from change_messages where author_id={account-id} and change_id={change-id};
Generating a Thread Dump for Debugging
--------------------------------------
We removed the Java Melody plugin the wake of the Log4Shell vulnerability.
This removed an easy way to acquire a thread dump but dumping threads is
still possible with java command line tools. You may find yourself wanting
to do this if Gerrit is suffering from poor performance or you are trying to
debug odd Gerrit behavior.
To run jstack and produce a thread dump do::
review02# docker exec -it gerrit-compose_gerrit_1 bash
gerrit@review02:/$ ps -ef | grep java # find the Gerrit java process PID
gerrit@review02:/$ jstack $PID > /tmp/dump.yearmonthday