Re: GenericObjectPool.borrowObject() hangs

Thu, 05 Mar 2009 02:35:20 -0800 

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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