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Posted to users@tomcat.apache.org by Kapilan A <ka...@triviumsys.com> on 2016/05/02 09:33:12 UTC
Apache Tomcat8 blocked once reached max thread(s) count
Hi Folks
I am facing one issue with Apache Tomcat 8.
In 32 GB machine, four instances of tomcat is running and every tomcat has
memory as 512-1024.
In the SQl server, a particular table called "MetaData".
Third party engine will post a http request through tomcat. it accepts max
thread as 150. Savings will happen in MetaData table which is around 8
million records.
After 12 hours continuously posting, then one of the tomcat is freeze. Its
not accepting any more connections from third party
and not creating sql connections too.
What kind of optimum configurations should i follow up in production machine
?
Please guide me to solve this problem soon.
Thanks & Regards
Kapilan A
Re: Apache Tomcat8 blocked once reached max thread(s) count
Posted by Christopher Schultz <ch...@christopherschultz.net>.
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David,
On 5/2/16 7:29 AM, David kerber wrote:
> On 5/2/2016 3:33 AM, Kapilan A wrote:
>> Hi Folks
>>
>> I am facing one issue with Apache Tomcat 8.
>>
>>
>>
>> In 32 GB machine, four instances of tomcat is running and every
>> tomcat has memory as 512-1024.
>>
>>
>>
>> In the SQl server, a particular table called "MetaData".
>>
>>
>>
>> Third party engine will post a http request through tomcat. it
>> accepts max thread as 150. Savings will happen in MetaData table
>> which is around 8 million records.
>>
>>
>>
>> After 12 hours continuously posting, then one of the tomcat is
>> freeze. Its not accepting any more connections from third party
>
> Without knowing anything about your app, I'd guess you have a
> statement or connection leak, causing the db to not accept any more
> connections.
+1
Enable "abandoned connection logging" and see what comes out.
- -chris
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Re: Apache Tomcat8 blocked once reached max thread(s) count
Posted by David kerber <dc...@verizon.net>.
On 5/2/2016 3:33 AM, Kapilan A wrote:
> Hi Folks
>
> I am facing one issue with Apache Tomcat 8.
>
>
>
> In 32 GB machine, four instances of tomcat is running and every tomcat has
> memory as 512-1024.
>
>
>
> In the SQl server, a particular table called "MetaData".
>
>
>
> Third party engine will post a http request through tomcat. it accepts max
> thread as 150. Savings will happen in MetaData table which is around 8
> million records.
>
>
>
> After 12 hours continuously posting, then one of the tomcat is freeze. Its
> not accepting any more connections from third party
Without knowing anything about your app, I'd guess you have a statement
or connection leak, causing the db to not accept any more connections.
>
> and not creating sql connections too.
>
>
>
> What kind of optimum configurations should i follow up in production machine
> ?
>
>
>
> Please guide me to solve this problem soon.
>
>
>
>
>
> Thanks & Regards
>
>
>
> Kapilan A
>
>
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Re: Apache Tomcat8 blocked once reached max thread(s) count
Posted by Mark Thomas <ma...@apache.org>.
On 02/05/2016 08:33, Kapilan A wrote:
> I am facing one issue with Apache Tomcat 8.
Which version?
<snip/>
> After 12 hours continuously posting, then one of the tomcat is freeze. Its
> not accepting any more connections from third party
What do the logs show?
What about a thread dump? Ideally, you should take 3 thread dumps ~15s
apart and compare them.
Mark
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