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From Phil Steitz <phil.ste...@gmail.com>
Subject Re: GenericObjectPool.borrowObject() hangs
Date Thu, 05 Mar 2009 10:34:44 GMT
Hi Arun,

You should post questions like this to the commons user list 
(http://commons.apache.org/mail-lists.html).  Put [dbcp] at the 
beginning of the subject line so people know what component the question 
is about.  The issues list is for automated notifications from the bug 
tracking and source repository systems.

Please also include information on how you have dbcp configured.  
Finally, when posting info from thread dumps, look through the entire 
dump to see if there is a thread that is active.  In the case below, you 
should look for a thread that is waiting on response from the database.

Phil

Arun Karthik wrote:
> Hi,
>
> Occasionally when the DB is taken down for maintenance my server hangs with jmap similar
to below:
> I am not able to reproduce the same when I try to unplug the DB machine's network cable
or any other way I could think ok.
> Could someone please guide me as to what the problem may  be.
>
> I am using
>
> 1.       commons-dbcp-1.2.1
>
> 2.       quartz scheduler
>
> 3.       commons-pool-1.2
>
> 4.       oracle DB with thin client
>
> 5.       ojdbc14.jar
>
> Thread 19804: (state = BLOCKED)
>  - java.lang.Object.wait(long) @bci=0 (Compiled frame; information may be imprecise)
>  - java.lang.Object.wait() @bci=2, line=485 (Interpreted frame)
>  - org.apache.commons.pool.impl.GenericObjectPool.borrowObject() @bci=121, line=748 (Interpreted
frame)
>  - org.apache.commons.dbcp.PoolingDataSource.getConnection() @bci=4, line=95 (Interpreted
frame)
>  - org.apache.commons.dbcp.BasicDataSource.getConnection() @bci=4, line=540 (Interpreted
frame)
>  - org.quartz.utils.PoolingConnectionProvider.getConnection() @bci=4, line=197 (Interpreted
frame)
>  - org.quartz.utils.DBConnectionManager.getConnection(java.lang.String) @bci=49, line=112
(Interpreted frame)
>  - com.abcd.jobs.utils.ABCDJobSchedulerUtil.getDBConnection() @bci=6, line=291 (Interpreted
frame)
>  - com.abcd.jobs.utils.ABCDJobSchedulerUtil.getJobs(javax.servlet.http.HttpServletRequest)
@bci=35, line=306 (Interpreted frame)
>  - org.apache.jsp.jobs_jsp._jspService(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
@bci=121, line=110 (Interpreted frame)
>  - org.apache.jasper.runtime.HttpJspBase.service(javax.servlet.http.HttpServletRequest,
javax.servlet.http.HttpServletResponse) @bci=3, line=70 (Interpreted frame)
>  - javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
@bci=30, line=803 (Interpreted frame)
>  - org.apache.jasper.servlet.JspServletWrapper.service(javax.servlet.http.HttpServletRequest,
javax.servlet.http.HttpServletResponse, boolean) @bci=395, line=393 (Interpreted frame)
>  - org.apache.jasper.servlet.JspServlet.serviceJspFile(javax.servlet.http.HttpServletRequest,
javax.servlet.http.HttpServletResponse, java.lang.String, java.lang.Throwable, boolean) @bci=134,
line=320 (Interpreted frame)
>  - org.apache.jasper.servlet.JspServlet.service(javax.servlet.http.HttpServletRequest,
javax.servlet.http.HttpServletResponse) @bci=436, line=266 (Interpreted frame)
>  - javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
@bci=30, line=803 (Interpreted frame)
>  - org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(javax.servlet.ServletRequest,
javax.servlet.ServletResponse) @bci=374, line=290 (Interpreted frame)
>  - org.apache.catalina.core.ApplicationFilterChain.doFilter(javax.servlet.ServletRequest,
javax.servlet.ServletResponse) @bci=101, line=206 (Interpreted frame)
>  - com.abcd.jobs.filters.SessionCheckFilter.doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse,
javax.servlet.FilterChain) @bci=179, line=87 (Interpreted frame)
>  - org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(javax.servlet.ServletRequest,
javax.servlet.ServletResponse) @bci=117, line=235 (Interpreted frame)
>  - org.apache.catalina.core.ApplicationFilterChain.doFilter(javax.servlet.ServletRequest,
javax.servlet.ServletResponse) @bci=101, line=206 (Interpreted frame)
>  - org.apache.catalina.core.StandardWrapperValve.invoke(org.apache.catalina.connector.Request,
org.apache.catalina.connector.Response) @bci=804, line=233 (Interpreted frame)
>  - org.apache.catalina.core.StandardContextValve.invoke(org.apache.catalina.connector.Request,
org.apache.catalina.connector.Response) @bci=285, line=175 (Interpreted frame)
>  - org.apache.catalina.core.StandardHostValve.invoke(org.apache.catalina.connector.Request,
org.apache.catalina.connector.Response) @bci=64, line=128 (Interpreted frame)
>  - org.apache.catalina.valves.ErrorReportValve.invoke(org.apache.catalina.connector.Request,
org.apache.catalina.connector.Response) @bci=6, line=102 (Interpreted frame)
>  - org.apache.catalina.core.StandardEngineValve.invoke(org.apache.catalina.connector.Request,
org.apache.catalina.connector.Response) @bci=42, line=109 (Interpreted frame)
>  - org.apache.catalina.connector.CoyoteAdapter.service(org.apache.coyote.Request, org.apache.coyote.Response)
@bci=157, line=263 (Interpreted frame)
>  - org.apache.coyote.http11.Http11Processor.process(java.net.Socket) @bci=432, line=844
(Interpreted frame)
>  - org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(java.net.Socket)
@bci=82, line=584 (Interpreted frame)
>  - org.apache.tomcat.util.net.JIoEndpoint$Worker.run() @bci=41, line=447 (Interpreted
frame)
>  - java.lang.Thread.run() @bci=11, line=619 (Interpreted frame)
>
> Regards,
> Arun
>
>
>   


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