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Chris LuandGitHub
6f036c7015
* fix(master): skip redundant DoJoinCommand on resumeState to prevent deadlock When fastResume is active (single-master + resumeState + non-empty log), the raft server becomes leader within ~1ms. DoJoinCommand then enters the leaderLoop's processCommand path, which calls setCommitIndex to commit all pending entries. The goraft setCommitIndex implementation returns early when it encounters a JoinCommand entry (to recalculate quorum), which can prevent the new entry's event channel from being notified — leaving DoJoinCommand blocked forever. Each restart appends a new raft:join entry to the log, while the conf file's commitIndex (only persisted on AddPeer) lags behind. After 3-4 restarts the uncommitted range contains old JoinCommand entries that trigger the early return before the new entry is reached. Fix: skip DoJoinCommand when the raft log already has entries (the server was already joined in a previous run). The fastResume mechanism handles leader election independently. * fix(master): handle Hashicorp Raft in HasExistingState Add Hashicorp Raft support to HasExistingState by checking AppliedIndex, consistent with how other RaftServer methods handle both raft implementations. * fix(master): use LastIndex() instead of AppliedIndex() for Hashicorp Raft AppliedIndex() reflects in-memory FSM state which starts at 0 before log replay completes. LastIndex() reads from persisted stable storage, correctly mirroring the non-Hashicorp IsLogEmpty() check.