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Posted to users@tomcat.apache.org by "Rengaswamy, Nagarajan" <Na...@biworldwide.com.INVALID> on 2022/03/01 13:49:11 UTC
RE: java.lang.OutOfMemoryError: Metaspace while deploying application
Hi Team,
Currently we are running 6 applications in Tomcat version 8.5.70
Our Linux Infra - memory size allocated like Entire memory 3GB, In that 1.5 GB as Heap size and 512 is for XX:MaxMetaspaceSize. Java version as 11.
No performance related issue while application runs in peak load. But when we deploy the any one of the application while running tomcat, first deploy get success and next deploy is throwing like "Exception in thread "<app-name>_Worker-3" java.lang.OutOfMemoryError: Metaspace"
Based on our investigation, heap dump shows _3_ instances of the ParallelWebappClassLoader consuming more memory which is causing this issue.
Currently we are doing server restart before deploy as workaround now.
Kindly suggest is there any open issue which needs to be addressed by Apache Software Foundation? or provide solution to overcome this issue.
Thanks!
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Re: java.lang.OutOfMemoryError: Metaspace while deploying application
Posted by Christopher Schultz <ch...@christopherschultz.net>.
Nagarajan,
On 3/1/22 08:49, Rengaswamy, Nagarajan wrote:
> Currently we are running 6 applications in Tomcat version 8.5.70
>
> Our Linux Infra - memory size allocated like Entire memory 3GB, In
> that 1.5 GB as Heap size and 512 is for XX:MaxMetaspaceSize.
The numbers above are confusing to me. If you have 1.5GiB heap and .5GiB
metaspace then what is 3GiB? Please post your actual memory-related JVM
launch options.
> Java version as 11. No performance related issue while application
> runs in peak load. But when we deploy the any one of the application
> while running tomcat, first deploy get success and next deploy is
> throwing like "Exception in thread "<app-name>_Worker-3"
> java.lang.OutOfMemoryError: Metaspace"
Do you get this error when you deploy the application the first time,
re-deploying an existing (already-deployed) application?
> Based on our investigation, heap dump shows _3_ instances of the
> ParallelWebappClassLoader consuming more memory which is causing this
> issue.
I would expect that you would have 6 ParallelWebappClassLoader instances
in the heap if you have 6 applications deployed. Are you saying that you
have 6 + 3 "extra" instances of that class in the heap?
If so, you have a classloader-pinning leak in /your web application/
that must be fixed. Mark posted a presentation in reply that should be
very helpful in diagnosing what's happening with your application.
> Currently we are doing server restart before deploy as workaround
> now.
>
> Kindly suggest is there any open issue which needs to be addressed by
> Apache Software Foundation? or provide solution to overcome this
> issue.
This is likely to be a problem with your application, not Apache Tomcat.
-chris
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Re: java.lang.OutOfMemoryError: Metaspace while deploying application
Posted by Mark Thomas <ma...@apache.org>.
https://home.apache.org/~markt/presentations/2010-08-05-Memory-Leaks-JavaOne-60mins.pdf
Written for Java 7 but applies equally later versions of Tomcat.
Mark
On 01/03/2022 13:49, Rengaswamy, Nagarajan wrote:
> Hi Team,
>
> Currently we are running 6 applications in Tomcat version 8.5.70
>
>
> Our Linux Infra - memory size allocated like Entire memory 3GB, In that 1.5 GB as Heap size and 512 is for XX:MaxMetaspaceSize. Java version as 11.
> No performance related issue while application runs in peak load. But when we deploy the any one of the application while running tomcat, first deploy get success and next deploy is throwing like "Exception in thread "<app-name>_Worker-3" java.lang.OutOfMemoryError: Metaspace"
>
>
>
> Based on our investigation, heap dump shows _3_ instances of the ParallelWebappClassLoader consuming more memory which is causing this issue.
>
> Currently we are doing server restart before deploy as workaround now.
>
> Kindly suggest is there any open issue which needs to be addressed by Apache Software Foundation? or provide solution to overcome this issue.
>
>
>
> Thanks!
>
> Disclaimer
>
> This e-mail message is being sent solely for use by the intended recipient(s) and may contain confidential information. Any unauthorized review, use, disclosure or distribution is prohibited.
> If you are not the intended recipient, please contact the sender by phone or reply by e-mail, delete the original message and destroy all copies. Thank you.
>
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