Bugfix: Deadlock in zlog_fini() while entering pthread_rwlock_wrlock() in multithreaded environment#184
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BoehserWolf wants to merge 1 commit intoHardySimpson:masterfrom
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Bugfix: Deadlock in zlog_fini() while entering pthread_rwlock_wrlock() in multithreaded environment#184BoehserWolf wants to merge 1 commit intoHardySimpson:masterfrom
BoehserWolf wants to merge 1 commit intoHardySimpson:masterfrom
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…) in multithreaded environment
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The freeze happened in zlog_fini() while entering the final pthread_rwlock_wrlock(). This happens to me in a multithreaded binary.
Had a hard time to identify this deadlock. However, I did not find the root cause since all trace messages regarding entering/leaving the lock did not lead to a root cause problem.
Was initially thinking that this glibc bug could have been the root cause but the problem described there was not exactly the problem I was facing.
However the the inital pthread_rwlock_trywrlock() is mandatory to not run into the deadlock. Additionally EDEADLK and EBUSY needs to be handled correctly to prevent the lock.
With this fix it was possible for me to stop/start my application for around 26000 times over the weekend without any deadlock.