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subscriptions fail in impala


We have been having an issue with "Impala" in the environment where sometimes the connections between impala daemons get refused and throw an error causing the queries to fail.
This issue has been happening intermittently in the cluster at random times during the day.

After some research, I reconfigured impala as below in all the 13 data nodes


echo 2000000 > /proc/sys/kernel/pid_max
echo 2097152 > /proc/sys/vm/max_map_count


--Adding below values to increase the process for impala in the limits.conf:

impala soft nproc 262144
impala hard nproc 262144

sender timeout.PNG

--Adding below values in the sysctl.conf to make to permanent change.


kernel.pid_max = 2000000


--After editing the file execute the below command to load it.

$ sudo sysctl -p


But I am still getting the sender timeout issue. Can anyone please assist?

I have attached the screenshot.