raft block on accquiring lock

[kikimo]

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raft sometimes block on accquiring lock when exiting, and hand there forever, only kill -9 can stop the instance.

Describe the bug (must be provided)

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Your Environments (must be provided)

• OS: uname -a
• Compliler: g++ --version or clang++ --version
• CPU: lscpu
• Commit id (e.g. a3ffc7d8)

How To Reproduce(must be provided)

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1. Step 1
2. Step 2
3. Step 3

Expected behavior

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Additional context

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[critical27]

Will check later