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Posted to users@tomcat.apache.org by Anuroop <an...@galaxyintelligentia.com> on 2012/11/19 12:52:21 UTC
My app stop respoding after 3 to 5 days in my Redhat server
Hi,
I am new for tomcat and linux.
I have hosted my application on my redhat server, from last 1 week I am
observing that its suddenly stops working after continuously running after 2
to 3days.
Observation:
Whenever my app stops responding I use to check port running or not using
fuser 80/tcp command. I see that tomcat 80 port will be running fine.
If I kill this port fuser 80/tcp -k and run tomcat once again my web app
start working properly for again 2 to 3 days.
I wanted to know whether is there any configuration issue in my tomcat,
because of more request coming from the client machine it is stop working?
Thanks and Regards,
Anuroop
Re: My app stop respoding after 3 to 5 days in my Redhat server
Posted by Christopher Schultz <ch...@christopherschultz.net>.
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Chuck,
On 11/19/12 9:13 AM, Caldarale, Charles R wrote:
>> From: Daniel Mikusa [mailto:dmikusa@vmware.com] Subject: Re: My
>> app stop respoding after 3 to 5 days in my Redhat server
>
>>> I wanted to know whether is there any configuration issue in my
>>> tomcat, because of more request coming from the client machine
>>> it is stop working?
>
>> Take some thread dumps when the application is no longer
>> responding.
>> https://wiki.apache.org/tomcat/HowTo#How_do_I_obtain_a_thread_dump_of_my_running_webapp_.3F
>
>>
> I would also recommend enabling GC logging or monitoring via JMX,
> since the symptoms are typical of heap exhaustion. For
> simplicity's sake, setting -verbose:gc is likely the easiest thing
> to do for those unfamiliar with Java. This link provides a
> reasonable description of how:
>
> http://freddyandersen.wordpress.com/2009/07/14/how-to-enable-verbose-gc-in-tomcat/
>
> JMX monitoring via VisualVM or JConsole will also provide a lot of
> information in a more palatable format, but can be trickier to set
> up.
Also, anything suspicious in logs/* is a good place to start.
- -chris
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RE: My app stop respoding after 3 to 5 days in my Redhat server
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Daniel Mikusa [mailto:dmikusa@vmware.com]
> Subject: Re: My app stop respoding after 3 to 5 days in my Redhat server
> > I wanted to know whether is there any configuration issue in my tomcat,
> > because of more request coming from the client machine it is stop working?
> Take some thread dumps when the application is no longer responding.
> https://wiki.apache.org/tomcat/HowTo#How_do_I_obtain_a_thread_dump_of_my_running_webapp_.3F
I would also recommend enabling GC logging or monitoring via JMX, since the symptoms are typical of heap exhaustion. For simplicity's sake, setting -verbose:gc is likely the easiest thing to do for those unfamiliar with Java. This link provides a reasonable description of how:
http://freddyandersen.wordpress.com/2009/07/14/how-to-enable-verbose-gc-in-tomcat/
JMX monitoring via VisualVM or JConsole will also provide a lot of information in a more palatable format, but can be trickier to set up.
- Chuck
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Re: My app stop respoding after 3 to 5 days in my Redhat server
Posted by Daniel Mikusa <dm...@vmware.com>.
On Nov 19, 2012, at 6:52 AM, Anuroop wrote:
> Hi,
>
>
>
> I am new for tomcat and linux.
>
>
>
> I have hosted my application on my redhat server, from last 1 week I am
> observing that its suddenly stops working after continuously running after 2
> to 3days.
>
>
>
> Observation:
>
>
>
> Whenever my app stops responding I use to check port running or not using
> fuser 80/tcp command. I see that tomcat 80 port will be running fine.
>
>
>
> If I kill this port fuser 80/tcp -k and run tomcat once again my web app
> start working properly for again 2 to 3 days.
>
>
>
> I wanted to know whether is there any configuration issue in my tomcat,
> because of more request coming from the client machine it is stop working?
>
Take some thread dumps when the application is no longer responding. This will tell you what is happening in the application once it has stopped responding to requests. Ideally you'd want three or more thread dumps, spread out with 15 - 20 seconds in between each thread dump.
https://wiki.apache.org/tomcat/HowTo#How_do_I_obtain_a_thread_dump_of_my_running_webapp_.3F
Dan
>
>
>
>
> Thanks and Regards,
>
> Anuroop
>
>
>
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