Comments (1)
This sounds like a bug that should be reported to libzmq, since it's not related to pyzmq. I guess ipc messages can drop when sockets close, apparently ignoring LINGER. You don't need to specify LINGER, either, since even with the default of waiting forever, messages are dropped. I don't know at what stage that's happening, but since adding sleep before sender.close results in delivered messages, it does sound like LINGER is just not implemented correctly for ipc senders. Setting SNDHWM to 1 also further accentuates the issue.
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