tree c62d083b0c550ccee7981aadfee7e63b4863fadb
parent 61993b4780919f283feff8e33f6ef05dce91ad5b
author Luca Milanesio <luca.milanesio@gmail.com> 1763476556 +0000
committer Luca Milanesio <luca.milanesio@gmail.com> 1763496108 +0000

Enable metrics for the high-availability executors' queues

Allow the Gerrit admin to track the activity of the thread pools and
queues status of the executors used by the plugin which also allows to
detect forwarding lags and highlight issues.

The use of queue metrics requires to change the reload mode of
the plugin to 'restart' because the new and old version of the plugin
won't be able to cohexist as they share the same namespace for the
generated metrics.

Also add the missing listeners' registration of the executors which
prevented the existing thread pools to be shutdown and released
upon plugin unload / reload or Gerrit shutdown.

Change-Id: Ic3845971cdd803e0e8701222ec1d844aafbdcf43