Hello all,

Since yesterday all of our loadbalanced tomcat servers have been refusing
further connection intermittently. During our internal stress testing,
we’ve managed to reproduce  the issue where maximum number of
threads/connections to Catalina were reached for one server, but then the
rest were loadbalanced to others. Eventually, everyone starts failing
health checks the Citrix network health monitor on port 80 and 8443.
Because all of them were eventually running out.

We wanted to pinpoint the time of the first hit observers  with Catalina
logs to see when max connections are reached or maxThreads are used. Is
there any log level for Catalina/localhost logs which we can use to see
this message ? If so which level should we be using ?

Also, we are using 8.5.37 with our own TSL cipher suites etc. this started
happening only since last few days. We would need to find out whether any
application threads are doubling up and exhausting the APR connectors
capacity for max threads/connections by holding them indefinitely.

Any suggestion/help you can give here would be appreciated.

Thanks,

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