No data received

[kandr-zg]

Issue description

I transmitted two pictures on a frame of data,the size of each image is 900K.But I can only receive one image, the other can't receive data.zmq_send return value of send is correct,zmq_recv return value of recv is 1.

Environment

• libzmq version (commit hash if unreleased): 4.3.3
• OS: Ubuntu16.04

[stale[bot]]

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