I am not completely sure of the meaning or the interplay between slowClientQueueLimit and messageQueueLimit.
As per the documentation, they both should ideally be set to the same value, https://ignite.apache.org/releases/2.4.0/javadoc/org/apache/ignite/spi/communication/tcp/TcpCommunicationSpi.html#setSlowClientQueueLimit-int-
However when i do set that i see this in the logs, is it a minor bug in the check or should i change this?
[WARN ] 2018-06-27 22:32:18.429 [main] org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi - Slow client queue limit is set to a value greater than message queue limit (slow client queue limit will have no effect) [msgQueueLimit=1024, slowClientQueueLimit=1024]
Thanks
From code the warning is correct, but javadoc is not. slowClientQueueLimit has to be less than msgQueueLimit, because when message is being prepared to sending, first are checked back pressure limits, and only then slowClientQueueLimit. If these two numbers are equal, sender thread will be blocked by back pressure before it could go to slow client check. What means client would not be dropped.
Set slowClientQueueLimit to msgQueueLimit - 1 or less, and I'll suggest community to fix the docs.