GlenGeng commented on pull request #2184:
URL: https://github.com/apache/ozone/pull/2184#issuecomment-827405218
@bharatviswa504 After installSnapshot, the lifecycle of follower's
SCMStateMachine is in PAUSED state.
```
stateMachine.followerEvent().notifyInstallSnapshotFromLeader(roleInfoProto,
firstAvailableLogTermIndex)
.whenComplete((reply, exception) -> {
if (exception != null) {
LOG.warn("{}: Failed to notify StateMachine to
InstallSnapshot. Exception: {}",
getMemberId(), exception.getMessage());
inProgressInstallSnapshotRequest.compareAndSet(firstAvailableLogTermIndex,
null);
return;
}
if (reply != null) {
LOG.info("{}: StateMachine successfully installed snapshot
index {}. Reloading the StateMachine.",
getMemberId(), reply.getIndex());
stateMachine.pause();
state.updateInstalledSnapshotIndex(reply);
state.reloadStateMachine(reply.getIndex());
}
inProgressInstallSnapshotRequest.compareAndSet(firstAvailableLogTermIndex,
null);
});
}
```
The reason is, after `notifyInstallSnapshotFromLeader ` is called, ratis
call ` stateMachine.pause();` again.
I am checking it.
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