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Posted to users@tomcat.apache.org by Karthik Nanjangude <ka...@xius-bcgi.com> on 2010/12/08 08:40:21 UTC
TOMCAT be in Hung state?
Hi
Spec
a) JDK 1.6
b) 2 Web Server Tomcat 5.0.20 (on same O/s with different Startup /shutdown ports & share the same RAM / CPU Processor]
c) O/s Linux Red hat [ Linux DTVMS1 2.6.18-128.1.10.el5PAE #1 SMP Wed Apr 29 14:24:53 EDT 2009 i686 i686 i386 GNU/Linux ]
1. RHEL AS 4U6
2. 8*2 GB RAM
3. 4 Processors
JAVA_OPTS="-Xms256m -Xmx512m"
Problem: Tomcat is not responding every 45 days
1) Stops writing Catalina.out,
2) Not responding with any of the jsp pages of the Application,
3) No exceptions raised.
and needs restart to over come the situation.
Can any body tell me under what circumstances can a TOMCAT be in Hung state?
with regards
N.S.Karthik
RE: TOMCAT be in Hung state?
Posted by Karthik Nanjangude <ka...@xius-bcgi.com>.
Hi
>> do you have some scheduled process that deletes the catalina.out every 45
days?
No we do not have any other application doing the same.
>> such as permgenspace out of memory, you will not anything in catalina.out
Since the Catalina.out file is not being generated we do not know if the same has happened. [ There is no Console view on Linux Os/ for Tomcat to validate the same. ]
With regards
karthik
-----Original Message-----
From: Daniel Baktiar [mailto:dbaktiar@gmail.com]
Sent: Wednesday, December 08, 2010 3:34 PM
To: Tomcat Users List
Subject: Re: TOMCAT be in Hung state?
1) do you have some scheduled process that deletes the catalina.out every 45
days? usually in linux, when logger open a file and some other process
deleted the file, it will not create new file, which i suspect the case in
catalina.out
2) probably combined with some part of code swallowing fatal error like
such as permgenspace out of memory, you will not anything in catalina.out
---
daniel baktiar
http://savinggaia.tritiumapps.com - saving the planet is everyone's
business!
On 8 December 2010 15:40, Karthik Nanjangude <
karthik.nanjangude@xius-bcgi.com> wrote:
> Hi
>
> Spec
>
> a) JDK 1.6
>
> b) 2 Web Server Tomcat 5.0.20 (on same O/s with different Startup /shutdown
> ports & share the same RAM / CPU Processor]
>
> c) O/s Linux Red hat [ Linux DTVMS1 2.6.18-128.1.10.el5PAE #1 SMP Wed Apr
> 29 14:24:53 EDT 2009 i686 i686 i386 GNU/Linux ]
>
>
> 1. RHEL AS 4U6
>
> 2. 8*2 GB RAM
>
> 3. 4 Processors
>
>
> JAVA_OPTS="-Xms256m -Xmx512m"
>
> Problem: Tomcat is not responding every 45 days
> 1) Stops writing Catalina.out,
> 2) Not responding with any of the jsp pages of the Application,
> 3) No exceptions raised.
>
> and needs restart to over come the situation.
>
> Can any body tell me under what circumstances can a TOMCAT be in Hung
> state?
>
>
> with regards
>
> N.S.Karthik
>
>
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Re: TOMCAT be in Hung state?
Posted by Daniel Baktiar <db...@gmail.com>.
1) do you have some scheduled process that deletes the catalina.out every 45
days? usually in linux, when logger open a file and some other process
deleted the file, it will not create new file, which i suspect the case in
catalina.out
2) probably combined with some part of code swallowing fatal error like
such as permgenspace out of memory, you will not anything in catalina.out
---
daniel baktiar
http://savinggaia.tritiumapps.com - saving the planet is everyone's
business!
On 8 December 2010 15:40, Karthik Nanjangude <
karthik.nanjangude@xius-bcgi.com> wrote:
> Hi
>
> Spec
>
> a) JDK 1.6
>
> b) 2 Web Server Tomcat 5.0.20 (on same O/s with different Startup /shutdown
> ports & share the same RAM / CPU Processor]
>
> c) O/s Linux Red hat [ Linux DTVMS1 2.6.18-128.1.10.el5PAE #1 SMP Wed Apr
> 29 14:24:53 EDT 2009 i686 i686 i386 GNU/Linux ]
>
>
> 1. RHEL AS 4U6
>
> 2. 8*2 GB RAM
>
> 3. 4 Processors
>
>
> JAVA_OPTS="-Xms256m -Xmx512m"
>
> Problem: Tomcat is not responding every 45 days
> 1) Stops writing Catalina.out,
> 2) Not responding with any of the jsp pages of the Application,
> 3) No exceptions raised.
>
> and needs restart to over come the situation.
>
> Can any body tell me under what circumstances can a TOMCAT be in Hung
> state?
>
>
> with regards
>
> N.S.Karthik
>
>
Re: TOMCAT be in Hung state?
Posted by Felix Schumacher <fe...@internetallee.de>.
Am Mittwoch, den 08.12.2010, 13:10 +0530 schrieb Karthik Nanjangude:
> Hi
>
> Spec
>
> a) JDK 1.6
>
> b) 2 Web Server Tomcat 5.0.20 (on same O/s with different Startup /shutdown ports & share the same RAM / CPU Processor]
>
> c) O/s Linux Red hat [ Linux DTVMS1 2.6.18-128.1.10.el5PAE #1 SMP Wed Apr 29 14:24:53 EDT 2009 i686 i686 i386 GNU/Linux ]
>
>
> 1. RHEL AS 4U6
>
> 2. 8*2 GB RAM
>
> 3. 4 Processors
>
>
> JAVA_OPTS="-Xms256m -Xmx512m"
That is a low setting compared to the ram of the machines. But if your
application needs only that much, it should be fine.
>
> Problem: Tomcat is not responding every 45 days
> 1) Stops writing Catalina.out,
> 2) Not responding with any of the jsp pages of the Application,
> 3) No exceptions raised.
>
> and needs restart to over come the situation.
>
> Can any body tell me under what circumstances can a TOMCAT be in Hung state?
You could try yourself by taking threaddumps at such times:
http://wiki.apache.org/tomcat/HowTo#How_do_I_obtain_a_thread_dump_of_my_running_webapp_.3F
hth
Felix
>
>
> with regards
>
> N.S.Karthik
>
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