https://bz.apache.org/bugzilla/show_bug.cgi?id=65455

Mark Thomas <ma...@apache.org> changed:

           What    |Removed                     |Added
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                 OS|                            |All
             Status|NEW                         |NEEDINFO

--- Comment #1 from Mark Thomas <ma...@apache.org> ---
It looks like Tomcat is reaching the maxConnections limit. Given the low usage
of the system, it looks like some connection closures are being missed. If this
analysis is correct, the finding the root cause is going to be a lot easier if
we can recreate the issue.

The default value for maxConnections is 10000. Can you try reducing, the lower
the better, and then try reproducing the issue? That should trigger the issue
faster and may provide some clues as to which connection closures are being
missed.

What is the nature of the web application where this is observed? Does is use
the Servlet async API? Does it use the Servlet non-blocking API? Does it use
WebSocket?

Try switching to the NIO connector. The performance of NIO and NIO2 is very
similar is most circumstances.

Testing with the latest 8.5.x release would also be helpful.

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