Frédéric Déléchamp

The stack traces indicate it is happening in I/O thread. Would you provide more context about when it is happening (what are the sockets used by your app, the frequency...

Out of curiosity, what is the pattern of your closing/recreate operations? YQueue is mainly untouched since... very long time (present in 3.3 at least, minus formatting), I expect something like...

If you are sharing zsocket with a couple of user-threads, you should change your code, [ZMQ sockets are not thread-safe](http://zguide.zeromq.org/page:all#Multithreading-with-ZeroMQ).

I fail to follow the causal relationship, but feel free to propose a PR for your fix, it may be useful for others.

I don't remember this particular test coming from czmq. Maybe I was overcautious. Feel free to change it back.

But yes, zmq package carries the java equivalent of libzmq, while org.zeromq is inspired from czmq. Both packages are java-native.

It is only for inproc transport that the number of messages able to be sent without hanging is equal to send HWM + receive HWM. As it is ipc transport,...

If you are looking for local endpoints, please have a look on the ZMonitor: https://github.com/zeromq/jeromq/blob/master/src/test/java/org/zeromq/ZMonitorTest.java or more low-level: https://github.com/zeromq/jeromq/blob/master/src/test/java/org/zeromq/TestEvents.java

There seems to be a misunderstanding. In which way are they different from the addresses your code is supplying for the connect operation?

The referenced commit is quite old (2012), if I interpret this in current implementation, I understand that code should stick to the [latest libzmq format of monitor messages, which consist...