In UBUNTU system, PUB end continuous outward message (interval 30s), lasted one and a half days, before the program with the following exception, what is the problem causes it,how do I solve
Exception in thread "iothread-2" java.lang.NullPointerException at zmq.Utils.tune_tcp_socket(Utils.java:41) at zmq.TcpListener.accept_event(TcpListener.java:84) at zmq.IOObject.accept_event(IOObject.java:116) at zmq.Poller.run(Poller.java:235) at java.lang.Thread.run(Thread.java:724)
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