Zookeeper’s connection limit causing 'AskTimeout' exception

[jichmi]

After adding a new cluster, we found that the "AskTimeout" exception was consistently reported when viewing the new cluster, and it still did not return to normal after multiple restarts.
We noticed through Netstat that there are quite a few connections to Zookeeper. We suspect that the number of connections to zk is limited. At this time, we found a large number of "Too many connections from/xxxxxx - max is 60" records in zk's logs.
And then we increased the maxClientCnxns from the default(60) to 120 and restarted the service.
The cluster information display is normal!!!