On 2/18/21 12:53 PM, Shawn Heisey wrote:
On 2/18/2021 12:11 PM, Niranjan Rao wrote:
Thank you the response. This is not a web application, but a
standalone java program. Hence I said it's not a tomcat question, but
a generic JVM question. I have been researching about this a lot and
based on many mails on this list, lot of people here know about
internal behavior of JVM and specs lot better than I do.
Apologies for getting that wrong.
Is it a custom app or something that you downloaded and installed?
Talk to whoever wrote it. They will hopefully know what information
is needed to troubleshoot further.
Is Java 15 required for the application to function? If you can
successfully use Java 11 or even Java 8, you'll be dealing with a far
more stable platform. Major show-stopper bugs in Java are rare, but
they do happen. I will warn you that although I do recommend
downgrading Java for stability purposes, I do not hold out a lot of
hope that it will solve this problem.
Which garbage collector are you using? I would recommend one of the
really stable collectors, like G1. I wrote this wiki page a long time
ago that includes garbage collection information for Solr ... I think
it would apply well to any application where latency is important than
throughput:
https://cwiki.apache.org/confluence/display/SOLR/ShawnHeisey
Thanks,
Shawn
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I tried talking to the author, myself - but not much luck. Anyways
talking with self does not help with new ideas much ;)
We added lot of logging and wrote a simple throw away tool to analyze
the logs. Even though task counts are similar, there were some time out
errors that could be causing the leaks. Currently a patch is deployed
and we are waiting to see if it has made any impact.
Interesting point was why is one machine getting brunt of bad things.
May be we will drop the box and spawn another VM with the assumption
that host could be heavily loaded or something similar not easily
visible things going on.
Your blog entry is very informative. Thank you.
Regards,
Niranjan
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