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From Ken Bowen <kbo...@als.com>
Subject Closed connection exception with validationQuery="select 1"
Date Sat, 12 Jul 2008 13:52:47 GMT
Hi All,

Using: Tomcat 5.5.26 ; Java 1.5 ; MySQL 5.0.51 running on CentOs 5.0  
hosted in a Virtuozzo container.

The problem: With MySQL connect_timeout = 5, I'm getting timeout  
exceptions (below)  even though I have a
validation query set; Here's my app's META-INF/context-xml:

<Context path="" debug="5" reloadable="true" crossContext="true">
    <Resource name="jdbc/sb_data" auth="Container"  
type="javax.sql.DataSource"
              maxActive="100" maxIdle="30" maxWait="10000"
              username="xxxxxx" password="xxxxxx"
              driverClassName="com.mysql.jdbc.Driver"
              url="jdbc:mysql://localhost:3306/sb_data"
              validationQuery="select 1"/>
    <Resource name="jdbc/sb_users" auth="Container"  
type="javax.sql.DataSource"
              maxActive="100" maxIdle="30" maxWait="10000"
              username="xxxxxx" password="xxxxxx"
              driverClassName="com.mysql.jdbc.Driver"
              url="jdbc:mysql://localhost:3306/sb_users"
              validationQuery="select 1"/>
</Context>


The exception trace is below.  Any guidance would be greatly  
appreciated.
Thanks in advance,
Ken Bowen

-------------------------
javax.servlet.ServletException: No operations allowed after connection  
closed.Connection was implicitly closed due to underlying exception/ 
error:


** BEGIN NESTED EXCEPTION **

com.mysql.jdbc.CommunicationsException
MESSAGE: 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:1934)
         at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2380)
         at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2909)
         at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1600)
         at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1695)
         at com.mysql.jdbc.Connection.execSQL(Connection.java:3020)
         at com.mysql.jdbc.Connection.execSQL(Connection.java:2949)
         at com.mysql.jdbc.Statement.executeQuery(Statement.java:959)
         at  
com.mysql.jdbc.DatabaseMetaData.getUserName(DatabaseMetaData.java:5986)
         at  
org 
.apache 
.tomcat 
.dbcp.dbcp.DelegatingConnection.toString(DelegatingConnection.java:104)
         at org.apache.tomcat.dbcp.dbcp.PoolingDataSource 
$PoolGuardConnectionWrapper.toString(PoolingDataSourc
e.java:344)
         at java.lang.String.valueOf(String.java:2615)
         at java.lang.StringBuilder.append(StringBuilder.java:116)
         at  
com.strongbrain.database.DAOBaseUsers.getConnection(DAOBaseUsers.java: 
38)
         at  
com.strongbrain.database.UserManager.getUserFromLogin(UserManager.java: 
276)
         at  
com.strongbrain.auth.LoggedInUser.loggedInFromCookie(LoggedInUser.java: 
59)
         at com.strongbrain.actions.BaseAction.execute(BaseAction.java: 
105)
         at  
org 
.apache 
.struts 
.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
         at  
org 
.apache.struts.action.RequestProcessor.process(RequestProcessor.java: 
224)
         at  
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
         at  
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
         at  
org 
.apache 
.catalina 
.core 
.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 
269)
         at  
org 
.apache 
.catalina 
.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at  
org 
.tuckey 
.web 
.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)
         at  
org 
.apache 
.catalina 
.core 
.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 
215)
         at  
org 
.apache 
.catalina 
.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at  
org 
.apache 
.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java: 
679)
         at  
org 
.apache 
.catalina 
.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java: 
461)
         at  
org 
.apache 
.catalina 
.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:399)
         at  
org 
.apache 
.catalina 
.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at  
org 
.tuckey 
.web.filters.urlrewrite.RewrittenUrl.doRewrite(RewrittenUrl.java:176)
         at  
org 
.tuckey 
.web 
.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:728)
         at  
org 
.apache 
.catalina 
.core 
.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 
215)
         at  
org 
.apache 
.catalina 
.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at  
com 
.strongbrain 
.DisableUrlSessionFilter.doFilter(DisableUrlSessionFilter.java:42)
         at  
org 
.apache 
.catalina 
.core 
.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 
215)
         at  
org 
.apache 
.catalina 
.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at  
org 
.apache 
.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java: 
213)
         at  
org 
.apache 
.catalina.core.StandardContextValve.invoke(StandardContextValve.java: 
174)
         at  
org 
.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java: 
127)
         at  
org 
.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java: 
117)
         at  
org 
.apache 
.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
         at  
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java: 
174)
         at  
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
         at  
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283)
         at  
org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:773)
         at  
org 
.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java: 
703)
         at org.apache.jk.common.ChannelSocket 
$SocketConnection.runIt(ChannelSocket.java:895)
         at org.apache.tomcat.util.threads.ThreadPool 
$ControlRunnable.run(ThreadPool.java:689)
         at java.lang.Thread.run(Thread.java:595)


** END NESTED EXCEPTION **



Last packet sent to the server was 1 ms ago.

STACKTRACE:

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:1934)
         at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2380)
         at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2909)
         at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1600)
         at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1695)
         at com.mysql.jdbc.Connection.execSQL(Connection.java:3020)
         at com.mysql.jdbc.Connection.execSQL(Connection.java:2949)
         at com.mysql.jdbc.Statement.executeQuery(Statement.java:959)
         at  
com.mysql.jdbc.DatabaseMetaData.getUserName(DatabaseMetaData.java:5986)
         at  
org 
.apache 
.tomcat 
.dbcp.dbcp.DelegatingConnection.toString(DelegatingConnection.java:104)
         at org.apache.tomcat.dbcp.dbcp.PoolingDataSource 
$PoolGuardConnectionWrapper.toString(PoolingDataSource.java:344)
         at java.lang.String.valueOf(String.java:2615)
         at java.lang.StringBuilder.append(StringBuilder.java:116)
         at  
com.strongbrain.database.DAOBaseUsers.getConnection(DAOBaseUsers.java: 
38)
         at  
com.strongbrain.database.UserManager.getUserFromLogin(UserManager.java: 
276)
         at  
com.strongbrain.auth.LoggedInUser.loggedInFromCookie(LoggedInUser.java: 
59)
         at com.strongbrain.actions.BaseAction.execute(BaseAction.java: 
105)
         at  
org 
.apache 
.struts 
.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
         at  
org 
.apache.struts.action.RequestProcessor.process(RequestProcessor.java: 
224)
         at  
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
         at  
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
         at  
org 
.apache 
.catalina 
.core 
.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 
269)
         at  
org 
.apache 
.catalina 
.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at  
org 
.tuckey 
.web 
.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)
         at  
org 
.apache 
.catalina 
.core 
.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 
215)
         at  
org 
.apache 
.catalina 
.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at  
org 
.apache 
.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java: 
679)
         at  
org 
.apache 
.catalina 
.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java: 
461)
         at  
org 
.apache 
.catalina 
.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:399)
         at  
org 
.apache 
.catalina 
.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at  
org 
.tuckey 
.web.filters.urlrewrite.RewrittenUrl.doRewrite(RewrittenUrl.java:176)
         at  
org 
.tuckey 
.web 
.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:728)
         at  
org 
.apache 
.catalina 
.core 
.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 
215)
         at  
org 
.apache 
.catalina 
.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at  
com 
.strongbrain 
.DisableUrlSessionFilter.doFilter(DisableUrlSessionFilter.java:42)
         at  
org 
.apache 
.catalina 
.core 
.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 
215)
         at  
org 
.apache 
.catalina 
.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at  
org 
.apache 
.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java: 
213)
         at  
org 
.apache 
.catalina.core.StandardContextValve.invoke(StandardContextValve.java: 
174)
         at  
org 
.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java: 
127)
         at  
org 
.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java: 
117)
         at  
org 
.apache 
.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
         at  
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java: 
174)
         at  
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
         at  
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283)
         at  
org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:773)
         at  
org 
.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java: 
703)
         at org.apache.jk.common.ChannelSocket 
$SocketConnection.runIt(ChannelSocket.java:895)
         at org.apache.tomcat.util.threads.ThreadPool 
$ControlRunnable.run(ThreadPool.java:689)
         at java.lang.Thread.run(Thread.java:595)


** END NESTED EXCEPTION **



Last packet sent to the server was 1 ms ago.
         at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2592)
         at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2909)
         at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1600)
         at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1695)
         at com.mysql.jdbc.Connection.execSQL(Connection.java:3020)
         at com.mysql.jdbc.Connection.execSQL(Connection.java:2949)
         at com.mysql.jdbc.Statement.executeQuery(Statement.java:959)
         at  
com.mysql.jdbc.DatabaseMetaData.getUserName(DatabaseMetaData.java:5986)
         at  
org 
.apache 
.tomcat 
.dbcp.dbcp.DelegatingConnection.toString(DelegatingConnection.java:104)
         at org.apache.tomcat.dbcp.dbcp.PoolingDataSource 
$PoolGuardConnectionWrapper.toString(PoolingDataSource.java:344)
         at java.lang.String.valueOf(String.java:2615)
         at java.lang.StringBuilder.append(StringBuilder.java:116)
         at  
com.strongbrain.database.DAOBaseUsers.getConnection(DAOBaseUsers.java: 
38)
         at  
com.strongbrain.database.UserManager.getUserFromLogin(UserManager.java: 
276)
         at  
com.strongbrain.auth.LoggedInUser.loggedInFromCookie(LoggedInUser.java: 
59)
         at com.strongbrain.actions.BaseAction.execute(BaseAction.java: 
105)
         at  
org 
.apache 
.struts 
.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
         at  
org 
.apache.struts.action.RequestProcessor.process(RequestProcessor.java: 
224)
         at  
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
         at  
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at  
org 
.apache 
.catalina 
.core 
.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 
269)
         at  
org 
.apache 
.catalina 
.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at  
org 
.tuckey 
.web 
.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)
         at  
org 
.apache 
.catalina 
.core 
.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 
215)
         at  
org 
.apache 
.catalina 
.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at  
org 
.apache 
.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java: 
679)
         at  
org 
.apache 
.catalina 
.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java: 
461)
         at  
org 
.apache 
.catalina 
.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:399)
         at  
org 
.apache 
.catalina 
.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
         at  
org 
.tuckey 
.web.filters.urlrewrite.RewrittenUrl.doRewrite(RewrittenUrl.java:176)
         at  
org 
.tuckey 
.web 
.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:728)
         at  
org 
.apache 
.catalina 
.core 
.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 
215)
         at  
org 
.apache 
.catalina 
.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at  
com 
.strongbrain 
.DisableUrlSessionFilter.doFilter(DisableUrlSessionFilter.java: 
42)        at  
org 
.apache 
.catalina 
.core 
.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 
215)
         at  
org 
.apache 
.catalina 
.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
         at  
org 
.apache 
.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java: 
213)
         at  
org 
.apache 
.catalina.core.StandardContextValve.invoke(StandardContextValve.java: 
174)
         at  
org 
.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java: 
127)
         at  
org 
.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java: 
117)
         at  
org 
.apache 
.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
         at  
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java: 
174)
         at  
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
         at  
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283)
         at  
org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:773)
         at  
org 
.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java: 
703)
         at org.apache.jk.common.ChannelSocket 
$SocketConnection.runIt(ChannelSocket.java:895)
         at org.apache.tomcat.util.threads.ThreadPool 
$ControlRunnable.run(ThreadPool.java:689)
         at java.lang.Thread.run(Thread.java:595)


** END NESTED EXCEPTION **


          
org 
.apache 
.struts.action.RequestProcessor.processException(RequestProcessor.java: 
523)
          
org 
.apache 
.struts 
.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
          
org 
.apache.struts.action.RequestProcessor.process(RequestProcessor.java: 
224)
          
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
          
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
         javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
         javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
          
org 
.tuckey 
.web 
.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)
          
org 
.tuckey 
.web.filters.urlrewrite.RewrittenUrl.doRewrite(RewrittenUrl.java:176)
          
org 
.tuckey 
.web 
.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:728)
          
com 
.strongbrain 
.DisableUrlSessionFilter.doFilter(DisableUrlSessionFilter.java:42)





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