[zeromq-dev] zmq thread mutex problem

[guolisen]

 Hello,

        I write a echo server like the picture(email accessory), but it often assert at mutex.hpp:90,  this line is pthread_mutex_destory, I don't know why, I think my thread is detach thread, so maybe thread data release before zmq pipe process 'close' command. and I add some delay before my thread exit, but the problem is not  resolved. who can give me some advice, thank u.
ps. error message is "Device or resource busy (mutex.hpp:90)"
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