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sspbond007
 Post subject: Communications link failure due to underlying exception:
PostPosted: Wed Dec 12, 2007 9:08 am 
Newbie

Joined: Mon Dec 03, 2007 11:24 am
Posts: 9
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:

** BEGIN NESTED EXCEPTION **

java.io.EOFException

STACKTRACE:

I am using struts and hibernate. After few hours I recieved error below.

java.io.EOFException
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1865)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2256)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2756)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1536)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1626)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3025)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2954)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1009)
at com.mchange.v2.c3p0.impl.NewProxyStatement.executeQuery(NewProxyStatement.java:35)
at com.dbydx.speechwriters.services.persistence.dao.hibernate.GeoipDataDAO.getCountryCode(GeoipDataDAO.java:42)
at com.dbydx.speechwriters.web.webui.open.LocationMapper.resolve(LocationMapper.java:113)
at com.dbydx.speechwriters.web.webui.open.LocationMapper.resolve(LocationMapper.java:86)
at com.dbydx.speechwriters.web.webui.open.OpenBean.mapLocation(OpenBean.java:382)
at com.dbydx.speechwriters.web.webui.open.OpenBean.check(OpenBean.java:273)
at org.apache.jsp.index_htm._jspService(index_htm.java:84)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:595)


** END NESTED EXCEPTION **



Last packet sent to the server was 6 ms ago.
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2467)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2756)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1536)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1626)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3025)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2954)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1009)
at com.mchange.v2.c3p0.impl.NewProxyStatement.executeQuery(NewProxyStatement.java:35)
at com.dbydx.speechwriters.services.persistence.dao.hibernate.GeoipDataDAO.getCountryCode(GeoipDataDAO.java:42)
at com.dbydx.speechwriters.web.webui.open.LocationMapper.resolve(LocationMapper.java:113)
at com.dbydx.speechwriters.web.webui.open.LocationMapper.resolve(LocationMapper.java:86)
at com.dbydx.speechwriters.web.webui.open.OpenBean.mapLocation(OpenBean.java:382)
at com.dbydx.speechwriters.web.webui.open.OpenBean.check(OpenBean.java:273)
at org.apache.jsp.index_htm._jspService(index_htm.java:84)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:595)
04:37:04,933 DEBUG SqlUtils:85 - Attempted to convert SQLException to SQLException. Leaving it alone. [SQLState: 08S01; errorCode: 0]
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:

** BEGIN NESTED EXCEPTION **

java.io.EOFException

STACKTRACE:

java.io.EOFException
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1865)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2256)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2756)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1536)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1626)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3025)
at com.mysql.jdbc.Connection.execSQL(Connection.java:2954)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1009)
at com.mchange.v2.c3p0.impl.NewProxyStatement.executeQuery(NewProxyStatement.java:35)
at com.dbydx.speechwriters.services.persistence.dao.hibernate.GeoipDataDAO.getCountryCode(GeoipDataDAO.java:42)
at com.dbydx.speechwriters.web.webui.open.LocationMapper.resolve(LocationMapper.java:113)
at com.dbydx.speechwriters.web.webui.open.LocationMapper.resolve(LocationMapper.java:86)
at com.dbydx.speechwriters.web.webui.open.OpenBean.mapLocation(OpenBean.java:382)
at com.dbydx.speechwriters.web.webui.open.OpenBean.check(OpenBean.java:273)
at org.apache.jsp.index_htm._jspService(index_htm.java:84)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:595)


** END NESTED EXCEPTION **
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farzad
 Post subject: Re: Communications link failure due to underlying exception:
PostPosted: Wed Dec 12, 2007 10:55 am 
Expert
Expert

Joined: Wed Apr 11, 2007 11:39 am
Posts: 735
Location: Montreal, QC
Most mysql installations drop idle connections by default. Are you using a connection pool?



Farzad-
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sspbond007
 Post subject: Re: Communications link failure due to underlying exception:
PostPosted: Fri Dec 14, 2007 10:24 am 
Newbie

Joined: Mon Dec 03, 2007 11:24 am
Posts: 9
yaa I am using connection pool.
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emmanuel
 Post subject:
PostPosted: Sat Dec 15, 2007 9:52 pm 
Hibernate Team
Hibernate Team

Joined: Sun Sep 14, 2003 3:54 am
Posts: 7256
Location: Paris, France
your connection pool does not check for broken connections then, check its documentation to enable it.

_________________
Emmanuel

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