RATIS-889. Fix TestRaftSnapshotWithGrpc and TestRaftSnapshotWithSimulatedRpc #81
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What changes were proposed in this pull request?
Fix TestRaftSnapshotWithGrpc and TestRaftSnapshotWithSimulatedRpc:
StateMachineUpdater
unregisters metrics from the registry during stop, so the timer after restart is not the same instance as before. Thus, to verify that snapshot is taken during stop, we need to obtain the pre-stop timer.Also verify the metric right after snapshot file is created.
https://issues.apache.org/jira/browse/RATIS-889
How was this patch tested?
Executed
TestRaftSnapshot*
multiple times. Also passed in CI:https://github.com/adoroszlai/incubator-ratis/runs/633049769