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sofastack / sofa-jraft

A production-grade java implementation of RAFT consensus algorithm.
https://www.sofastack.tech/projects/sofa-jraft/
Apache License 2.0
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fix: ThreadId miss unlock(#1107) #1108

Closed ye-xiaowei closed 3 weeks ago

ye-xiaowei commented 3 weeks ago

Motivation:

在 ThreadId lock 和 destroy ThreadId 并发情况下，可能导致 ThreadId 锁不释放

Modification:

取消判断 ThreadId 是否 destroy 来释放锁，而是只要持有就释放。因为在 onError 中可能释放锁，需要判断 isHeldByCurrentThread() 是否持有来释放锁

Result:

Fixes #1107

Summary by CodeRabbit

coderabbitai[bot] commented 3 weeks ago

Walkthrough

The changes address potential deadlock issues in the ThreadId.java file by ensuring that the lock is only unlocked if held by the current thread. Additionally, the test assertion delta in ThreadIdTest.java has been adjusted from 10 to 20.

Changes

File Path Change Summary
jraft-core/src/main/java/com/alipay/sofa/jraft/util/ThreadId.java Updated the finally block to check if the lock is held by the current thread before unlocking it.
jraft-core/src/test/java/com/alipay/sofa/jraft/util/ThreadIdTest.java Modified the assertion delta in a test method from 10 to 20.

Assessment against linked issues

Objective (Issue #1107) Addressed Explanation
Ensure no deadlock occurs when FSMCaller-Disruptor thread destroys Replicator while other threads wait on the lock. ✅
Validate the lock is only unlocked if held by the current thread. ✅

Poem

In the realm of code so bright,
Threads dance through day and night,
Locks now held with care,
No deadlocks to ensnare,
Tests adjusted, all set right.
🎉🐇

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fengjiachun commented 3 weeks ago

@killme2008 Please take a look, and I wonder if we can just use ThreadId.unlock() to instead this.lock.unlock()?