Tomcat9 - unresponsive

[Ramesh B R]

Hello team,

Need your help to resolve the unresponsive behaviour of tomcat9 very
frequently which made us to restart the server to fix the issue which is
not a right thing.

Tomcat 9
Java8
Linux 8

Please let me know if you need any other details.

Regards,
Ramesh

Re: Tomcat9 - unresponsive

[Ramesh B R]

Hi Mark,

Thank you for your response.

Have few more questions.
1.  What would be the idle heap memory  in production, we have 32 GB RAM
2.  Calling system very frequently see this error "Connect to
gte-onesource.wip.its.hpecorp.net:8080 failed: NIECONN_REFUSED(-10)", how
to fix this one?
3. How to restart the server without impacting current transactions.

Regards,
Ramesh





Regards,
Ramesh

On Tue, Dec 17, 2024 at 6:06 PM Mark Thomas  wrote:

> On 17/12/2024 11:36, Ramesh B R wrote:
> > Hello team,
> >
> > Need your help to resolve the unresponsive behaviour of tomcat9 very
> > frequently which made us to restart the server to fix the issue which is
> > not a right thing.
> >
> > Tomcat 9
> > Java8
> > Linux 8
> >
> > Please let me know if you need any other details.
>
> Next time it happens take 3 thread dumps each ~5 seconds apart. A 3-way
> diff between those thread dumps is likely to show you where/why things
> are backed up. If you need help interpreting that data, post the thread
> dumps somewhere we can download them and send the links to this list.
>
> Mark
>
>
> -
> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
> For additional commands, e-mail: users-h...@tomcat.apache.org
>
>

Best practices to set heap memory

[Ramesh B R]

Hello team,

How to decide on heap memory size?
is it 25% of total memory? or 50% total memory?

What is the ideal value (in %) for heap memory ?

Regards,
Ramesh

tomcat9 - Connection refused/closed and parse error

[Ramesh B R]

Hell all,

The application hosted on tomcat9 exposes soap api which is consumed by SAP.
On a daily basis we are getting 200 thousands transactions and out of that
we could see around 1000 to 2000 failed transactions due to CONNECTION
REFUSED, CONNECTION CLOSED and PARSE ERROR.

The application is running on 6 VM's and each VM had 12 CPU and 36 GB RAM

Any suggestions to avoid these failures.

Regards,
Ramesh

ThreadDump_p1lg512486.txt

[Ramesh B R]

Hello team,

We are using tomcat 9 version in RHEL 8 and application gets into hung
status very often.

Have captured the thread dump  to find the route cause.

Could you please help here to see what is issue and how to fix it.

Regards,
Ramesh