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From Alessandro Bahgat <ale.bah...@gmail.com>
Subject Re: Tomcat 6.0.16 + mod_jk 1.2.19 - request threads hanging up
Date Wed, 09 Dec 2009 11:00:01 GMT
Nishant,
that didn't quite work, actually.

After some struggle with our outsourcers, we added a new machine
running Tomcat 6.0.20 *without tcnative* (they misplaced the .so
files).

That eventually resulted in a worse behaviour: within a few minutes
from startup all the TP-Processor threads on that machine get stuck on
the java.net.SocketInputStream.socketRead0 method.

We are about to test the same server using
- Tomcat 6.0.20 + tcnative 1.1.18
- Tomcat 6.0.16 + tcnative 1.1.18

(Our original configuration runs on Tomcat 6.0.16 + tcnative 1.1.10)

In the meanwhile, we found out these lines in the mod_jk log:

 [Thu Dec 03 16:58:52 2009][31539:42688] [info]
service::jk_lb_worker.c (873): unrecoverable error 200, request
failed. Client failed in the middle of request, we can't recover to
another instance.

Could that be related to a firewall not working properly between
Apache and Tomcat?

Regards,
Alessandro

On Mon, Dec 7, 2009 at 8:20 AM, Nishant Hadole
<Nishant.Hadole@siemens.com> wrote:
>
> Dear Ale,
>
> I am interested in solution of issue mentioned, as we are having similar
> one. Did the upgrade resolves the issue?
>
>
> Alessandro Bahgat wrote:
>>
>> On Wed, Nov 18, 2009 at 3:26 PM, Caldarale, Charles R
>> <Chuck.Caldarale@unisys.com> wrote:
>>>> From: Alessandro Bahgat [mailto:ale.bahgat@gmail.com]
>>>> Subject: Tomcat 6.0.16 + mod_jk 1.2.19 - request threads hanging up
>>>>
>>>> Our Tomcat (6.0.16) servers have many ajp threads that are stuck
>>>> executing the the native sendbb method of the class
>>>> org.apache.tomcat.jni.Socket.
>>>
>>> Try upgrading to the current Tomcat version (6.0.20), or at least using
>>> the latest version of tcnative (1.1.16).  The symptoms you describe have
>>> been observed in older versions.  Alternatively, turn off APR by removing
>>> or renaming the .so file in Tomcat's bin directory.
>>>
>>>  - Chuck
>>
>> Thank you, I will do that.
>> I just managed to persuade our customer to upgrade tcnative (now
>> 1.1.10) on one of the production systems to see if it makes any
>> difference. We'll probably plan a Tomcat upgrade in the next weeks as
>> well.
>>
>> - Ale
>>
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>>
>
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