Fix timeout of send thread in Async client for v5 #1457
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When the outgoing packets fails to be sent due to hitting the limitation of the inflight maximum, it will wait on send_cond/send_sem. Send thread should be woken up on PUBACK message received. So it does not need to wait until timeout (1 second). Signed-off-by: Tiejun Zhou <tizho@microsoft.com>
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If this solution is correct (I want to check), then it will apply to PUBCOMP too, in case the QoS of the message being sent is 2. |
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Thanks for your suggestion! I run the test, and the same issue exists in QoS2 too. The test is modified from sample MQTTAsync_publish.c and attached. To run it, simply start a mosquitto broker in localhost. Before fix, you will see random stuck for 1 second. It does not always reproducible since it is a race condition. Run multiple times and the issue will eventually be reproduced. |
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When the outgoing packets fails to be sent due to hitting the limitation of the inflight maximum, it will wait on send_cond/send_sem. Send thread should be woken up on PUBACK message received. So it does not need to wait until timeout (1 second).