ZMQ Options Error

[in3rsha]

I am trying to enable ZMQ by adding the following options to my bitcoin.conf:

zmqpubrawblock=tcp://127.0.0.1:28332
zmqpubrawtx=tcp://127.0.0.1:28333

However, when I start bitcoind with these options I get the following error:

bitcoind: zmq/zmqpublishnotifier.cpp:104: virtual void CZMQAbstractPublishNotifier::Shutdown(): Assertion `psocket' failed.

For what it's worth, this only seems to happen when I have both zmqpubrawblock and zmqpubrawtx enabled as options, but individually they work fine. For example:

bitcoind --testnet -zmqpubrawblock=tcp://127.0.0.1:28332 # this works
bitcoind --testnet -zmqpubrawtx=tcp://127.0.0.1:28333 # this works
bitcoind --testnet -zmqpubrawblock=tcp://127.0.0.1:28332 -zmqpubrawtx=tcp://127.0.0.1:28333 # error

I've been following the guide at https://github.com/bitcoin/bitcoin/blob/master/doc/zmq.md, but it doesn't seem to explain why this is happening.

What could be causing this error? Thanks in advance for any advice.

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EDIT: I tried to recreate this error on a different computer and the config works without error. I believe there may be an issue with the bitcoin.conf on the other computer. I will compare the two bitcoin.conf files to see if I can spot what may be causing this error.

Nonetheless, I'd still be very interested in understanding what this particular error message indicates.

EDIT 2: I believe this error may be caused due to multiple ZMQs using the same port at the same time (e.g. running bitcoind and bitcoind -testnet at the same time, and both are using the same bitcoin.conf with the same ZMQ ports set).

Will check the ports on the other computer with ss -lntp to see if they're in use.

[benthecarman]

You can't have mainnet and a testnet node using the same zmq port. You can use network specific options to differentiate the two.