[GitHub] [incubator-brpc] stdpain commented on issue #1741: bthread dead lock when yield with a lock

[GitBox <gi...@apache.org>]

stdpain commented on issue #1741:
URL: https://github.com/apache/incubator-brpc/issues/1741#issuecomment-1098850059

   It looks like this, assuming there is only one worker.
   The worker schedules bthread1 to get the lock on the pthread and then performs a yield.
   The worker schedules bthread2 to try to get the pthread lock, and then blocks.
   
   Since worker is blocked, it cannot schedule bthread1, so bthread1 cannot release the lock, resulting in a deadlock.
   
   The main reason is not that the bthread_setconcurrency is too small. Because even if the worker is large, it will still get stuck, but the probability is very low.


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