Improve slow logging in MasterService#45241
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DaveCTurner merged 2 commits intoelastic:7.xfrom Aug 6, 2019
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Adds a tighter threshold for logging a warning about slowness in the `MasterService` instead of relying on the cluster service's 30-second warning threshold. This new threshold applies to the computation of the cluster state update in isolation, so we get a warning if computing a new cluster state update takes longer than 10 seconds even if it is subsequently applied quickly. It also applies independently to the length of time it takes to notify the cluster state tasks on completion of publication, in case any of these notifications holds up the master thread for too long. Relates elastic#45007
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Adds a tighter threshold for logging a warning about slowness in the
MasterServiceinstead of relying on the cluster service's 30-second warningthreshold. This new threshold applies to the computation of the cluster state
update in isolation, so we get a warning if computing a new cluster state
update takes longer than 10 seconds even if it is subsequently applied quickly.
It also applies independently to the length of time it takes to notify the
cluster state tasks on completion of publication, in case any of these
notifications holds up the master thread for too long.
Relates #45007
Backport of #45086