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Posted to users@tomcat.apache.org by Christopher Schultz <ch...@christopherschultz.net> on 2007/09/04 22:34:57 UTC
Re: Tomcat freeze after some times
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Ice,
Ice72 wrote:
> Hi Cris,
>
> thanks for your reply. Yes: I checked the process via top/netstat/lsof and I
> haven't detect any
> strange situation. The super-strange thing is that the other webapps, on the
> same tomcat-instance,
> continue to work when the single-app fail.
Sounds like a db connection pool exhaustion.
- -chris
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Re: Tomcat freeze after some times
Posted by Lionel Crine <lc...@linagora.com>.
Hi,
I had this situation once few years ago.
I was working and I discovered that the pool was exhausted to access
Oracle and the application stucked.
It was really tricky to find the error because nothing indicates a problem.
The explanation was this one : A dynamic query (created in java) doing
some imbricated requests froze the database access.
So the query was never ending, waiting for a new connection to continue
requesting ... and so on.
Lionel
Ice72 wrote:
> Yes ... in theory. But if was this case, in the jstack dump, we should view
> the incoming http-req
> which waiting for a pooled connection (I have a ConnPool.getConnection()
> class/method).
>
> But ... on the dump there is anything ... P-(
>
>
>
> Christopher Schultz-2 wrote:
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>>
>> Ice,
>>
>> Ice72 wrote:
>>> Hi Cris,
>>>
>>> thanks for your reply. Yes: I checked the process via top/netstat/lsof
>>> and I
>>> haven't detect any
>>> strange situation. The super-strange thing is that the other webapps, on
>>> the
>>> same tomcat-instance,
>>> continue to work when the single-app fail.
>> Sounds like a db connection pool exhaustion.
>>
>> - -chris
>>
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>> iD8DBQFG3cFx9CaO5/Lv0PARAqwEAJ9G2/L/Id9b3igPx/F4AVWfqxfAMQCfTlBy
>> g8sHhqlF2PBWGDhx0ZSmwq4=
>> =j3zb
>> -----END PGP SIGNATURE-----
>>
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>
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Re: Tomcat freeze after some times
Posted by Ice72 <rc...@tiscali.it>.
Yes ... in theory. But if was this case, in the jstack dump, we should view
the incoming http-req
which waiting for a pooled connection (I have a ConnPool.getConnection()
class/method).
But ... on the dump there is anything ... P-(
Christopher Schultz-2 wrote:
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Ice,
>
> Ice72 wrote:
>> Hi Cris,
>>
>> thanks for your reply. Yes: I checked the process via top/netstat/lsof
>> and I
>> haven't detect any
>> strange situation. The super-strange thing is that the other webapps, on
>> the
>> same tomcat-instance,
>> continue to work when the single-app fail.
>
> Sounds like a db connection pool exhaustion.
>
> - -chris
>
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> Version: GnuPG v1.4.7 (MingW32)
> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
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> iD8DBQFG3cFx9CaO5/Lv0PARAqwEAJ9G2/L/Id9b3igPx/F4AVWfqxfAMQCfTlBy
> g8sHhqlF2PBWGDhx0ZSmwq4=
> =j3zb
> -----END PGP SIGNATURE-----
>
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