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Regarding a Communication Link Failure Error

Perumal Sundar raj
Greenhorn

Joined: Feb 05, 2007
Posts: 1
Hi
I develpoed a Web applicaton by using the JSP and MySql.That comes a Communication Link Failure Error.I tried up to my Knowledge, yet i didn't solve.Kindly help him and give the soluation.

Developed Details:-
Platform : windows2000
S/w : java 1.5.0_07
Server : apache tomcat 5.5.17
DB : MySql 5.0.23
IDE : Netbeans5.0

Uploaded Details:-
Platform : Linux
S/w : java 1.5.0
Server : apache tomcat 5.5.9
DB : MySql 4.1.17

Error Details:-
HTTP Status 500 -

type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.

exception javax.servlet.ServletException: Communication link failure: java.io.EOFException, underlying cause: null** BEGIN NESTED EXCEPTION ** java.io.EOFExceptionSTACKTRACE:java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1394) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1538) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1929) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1167) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1278) at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1224) at com.mysql.jdbc.Connection.execSQL(Connection.java:2244) at com.mysql.jdbc.Connection.execSQL(Connection.java:2192) at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163) at PharmaCollection.DataBaseConnection.ExecuteQuery(DataBaseConnection.java:52) at org.apache.jsp.stock_jsp._jspService(org.apache.jsp.stock_jsp:286) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595)** END NESTED EXCEPTION ** org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:848) org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781) org.apache.jsp.stock_jsp._jspService(org.apache.jsp.stock_jsp:410) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241) javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause java.sql.SQLException: Communication link failure: java.io.EOFException, underlying cause: null** BEGIN NESTED EXCEPTION ** java.io.EOFExceptionSTACKTRACE:java.io.EOFException at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1394) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1538) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1929) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1167) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1278) at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1224) at com.mysql.jdbc.Connection.execSQL(Connection.java:2244) at com.mysql.jdbc.Connection.execSQL(Connection.java:2192) at com.mysql.jdbc.Statement.executeQuery(Statement.java:1163) at PharmaCollection.DataBaseConnection.ExecuteQuery(DataBaseConnection.java:52) at org.apache.jsp.stock_jsp._jspService(org.apache.jsp.stock_jsp:286) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595)** END NESTED EXCEPTION ** com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1713) com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1929) com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1167) com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1278) com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1224) com.mysql.jdbc.Connection.execSQL(Connection.java:2244) com.mysql.jdbc.Connection.execSQL(Connection.java:2192) com.mysql.jdbc.Statement.executeQuery(Statement.java:1163) PharmaCollection.DataBaseConnection.ExecuteQuery(DataBaseConnection.java:52) org.apache.jsp.stock_jsp._jspService(org.apache.jsp.stock_jsp:286) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241) javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs.
Apache Tomcat/5.5.9

Taken Steps:-
1.To change the configuration with lower versions and checked.
Platform : windowsXP Server : apache tomcat 5.5.17
DB : MySql 4.1.22
We can't find any communication link failure error.It is working properly.
2.To check the connection String and query fulfillment.
3.To change the MySql connector 3.1 to Mysql connector 5.0.4
4.To change the MySql global variable wait_timeout value to 2 times of default value.
5.To configure the local PC hosts file( include the IP Address).

Thanks & Regards
Perumal S
Adeel Ansari
Ranch Hand

Joined: Aug 15, 2004
Posts: 2874
Was it running fine under windows?
Looks like a driver error to me. Just a guess.
Milan Jagatiya
Ranch Hand

Joined: Jan 01, 2007
Posts: 164
i think adeel is right...looks like a driver error
it may possible that you are using mysql 4.1.
there are lots of changes comes in mysql 5.
check it out with mysql 5 with specific driver.


Milan.<br />I can because I think I can...
 
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