On 12/02/2013 18:42, Cool Techi wrote:
> I am not logging to database, these are my appenders,
You posted the below in a previous message. It was in a single
unintelligible line. Perhaps you could clarify what you intended to
post and try again?
org.apache.log4j.Category.callAppenders
com.mysql.jdbc.SingleByteCharsetConverter.getInstance
org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.borrorObject()
org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.addObjectToPool()
ogr.apache.tomcat.dbcp.pool.impl.GenericObjectPool.getNumIdle
p
> <appender name="errorfile" class="org.apache.log4j.DailyRollingFileAppender">
> <param name="File" value="D:/Logs/errorVer.log" />
> <param name="threshold" value="error" />
> <layout class="org.apache.log4j.PatternLayout">
> <param name="ConversionPattern" value="%d{yyyy-MMM-dd
> HH:mm:ss,SSS} %5p %c{1}:%L - %m%n" />
> </layout>
> </appender>
>
> <appender name="debugfile"
> class="org.apache.log4j.DailyRollingFileAppender">
> <param name="File" value="D:/Logs/debugVer.log" />
> <layout class="org.apache.log4j.PatternLayout">
> <param name="ConversionPattern" value="%d{yyyy-MMM-dd
> HH:mm:ss,SSS} %5p %c{1}:%L - %m%n" />
> </layout>
> <filter class="org.apache.log4j.varia.LevelRangeFilter">
> <param name="LevelMin" value="debug" />
> <param name="LevelMax" value="debug" />
> </filter>
> </appender>
>
> regards,
> Ayush
>
>> Date: Tue, 12 Feb 2013 18:38:24 +0000
>> From: [email protected]
>> To: [email protected]
>> Subject: Re: Tomcat hanging unexpectedly [URGENT]
>>
>> On 12/02/2013 17:53, Cool Techi wrote:
>>>
>>>
>>>
>>> I am new to this, I have just installed YourKit and see a lot of threads
>>> blocked,but currently my response are fine, the blocked thread are showing
>>> the following
>>>
>>> Blocker Thread QuartzSchedular_Worker-6 native ID ..
>>>
>>> On clicking on the Blocker thread it shows me the following,
>>>
>>>
>>>
>>> org.apache.log4j.Category.callAppenderscom.mysql.jdbc.SingleByteCharsetConverter.getInstanceorg.apache.tomcat.dbcp.pool.impl.GenericObjectPool.borrorObject()org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.addObjectToPool()ogr.apache.tomcat.dbcp.pool.impl.GenericObjectPool.getNumIdle
>>> Does any of these sound like reason. It would be great to get pointed in
>>> the right direction.
>>> Regards,Ayush
>>
>>
>> Oh dear.
>>
>> Are you doing your app logging to a database?
>>
>> Is it the same database that your app uses?
>>
>> Is it the same connection pool that your app uses?
>>
>>
>> p
>>
>>
>>>> Date: Tue, 12 Feb 2013 15:35:40 -0200
>>>> From: [email protected]
>>>> To: [email protected]
>>>> Subject: Re: Tomcat hanging unexpectedly [URGENT]
>>>>
>>>> There is a similar thread published a week ago.
>>>> It can be caused by almost anything, and my last suspect would be Tomcat
>>>> it self.
>>>> Most of time, the cause is some programming error, like:
>>>> - missing step out of recursive loop
>>>> - loading too many objects is memory (for example, when using JPA where
>>>> graph of objects are all connected - so, when you load one object, all
>>>> database is read into memory)
>>>> - some deadlock in multi-threaded application...
>>>>
>>>> How to discover:
>>>>
>>>> 1) Try to get a memory dump and check how your memory is being used
>>>> 2) Get a heap dump (stack trace, as well) or currently running
>>>> application when it is hang, and check for deadlocks
>>>> 3) Use VisualVM to get a big picture of what the virtual machine is doing
>>>> 4) Put the application running under profiler (like JRockit Mission
>>>> Control, or NetBeans profiler)
>>>>
>>>> These are some ideas...
>>>>
>>>> Regards,
>>>>
>>>> Edson
>>>>
>>>>
>>>> Em 12/02/2013 15:27, Cool Techi escreveu:
>>>>> Hi,
>>>>>
>>>>> We are using tomcat 6.0.26 on windows 2008 web server, with Jdk 1.6.32
>>>>> installed on the server.
>>>>>
>>>>> The
>>>>> server seems to be running smoothly most of the time, but suddenly the
>>>>> memory used goes very high and tomcat stops responding, the logs don't
>>>>> show any out of memory or thread exceptions.
>>>>>
>>>>> What could be causing this?
>>>>>
>>>>> Regards,
>>>>> Ayush
>>>>
>>>>
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>>>
>>>
>>>
>>
>>
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>>
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