Don't use that ... it still throws an error, reconnecting only after the exception is thrown. If using the db pooling in tomcat, it's better to include a validationQuery attribute in the <Resource ... /> element in your app's context.xml file. If on the other hand you are directly connecting the database on your own then just trap the exception, open a new connection and try again.
--David On 5/30/2010 1:53 PM, Yucca Nel wrote: > Ok I need to keep connection open to avoid exceeption but have found this is > deprecated .... > autoReconnect=true > can someone provide up to date strategy for dealing with this? > > -------------------------------------------------- > From: "Jeff" <jwi...@cox.net> > Sent: Sunday, May 30, 2010 5:54 PM > To: "Tomcat Users List" <users@tomcat.apache.org> > Subject: Re: problems at thejarbar.org > > >> would this help? >> >> http://tomcat.apache.org/tomcat-6.0-doc/jndi-datasource-examples-howto.html#Common%20Problems >> >> >> On 5/30/2010 10:08 AM, Yucca Nel wrote: >> >>> The following is becoming a common and serious problem and I am unable to >>> find a google solution for it... >>> I have never seen sych an error and it does not appear to be common >>> enough to get many google hits but when it happens, no one is able to >>> register at my site... >>> >>> Stck trace: >>> >>> Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: >>> Communications link failure >>> >>> The last packet successfully received from the server was 4,290,127 >>> milliseconds ago. The last packet sent successfully to the server was 0 >>> milliseconds ago. >>> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) >>> at >>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) >>> at >>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) >>> at java.lang.reflect.Constructor.newInstance(Constructor.java:513) >>> at com.mysql.jdbc.Util.handleNewInstance(Util.java:406) >>> at >>> com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074) >>> at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3052) >>> at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2938) >>> at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3481) >>> at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1959) >>> at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2109) >>> at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2648) >>> at >>> com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2077) >>> at >>> com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2228) >>> at org.apache.catalina.realm.JDBCRealm.getPassword(JDBCRealm.java:550) >>> ... 15 more >>> Caused by: java.io.EOFException: Can not read response from server. >>> Expected to read 4 bytes, read 0 bytes before connection was unexpectedly >>> lost. >>> at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2497) >>> at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2949) >>> ... 23 more >>> ERROR TP-Processor6 org.hibernate.util.JDBCExceptionReporter - >>> Communications link failure >>> >>> The last packet successfully received from the server was 4,299,820 >>> milliseconds ago. The last packet sent successfully to the server was 0 >>> milliseconds ago. >>> ERROR TP-Processor6 org.hibernate.util.JDBCExceptionReporter - No >>> operations allowed after connection closed.Connection was implicitly >>> closed by the driver. >>> ERROR TP-Processor6 org.hibernate.util.JDBCExceptionReporter - No >>> operations allowed after connection closed.Connection was implicitly >>> closed by the driver. >>> ERROR TP-Processor6 org.hibernate.util.JDBCExceptionReporter - No >>> operations allowed after connection closed.Connection was implicitly >>> closed by the driver. >>> ERROR TP-Processor6 org.hibernate.util.JDBCExceptionReporter - No >>> operations allowed after connection closed.Connection was implicitly >>> closed by the driver. >>> ERROR TP-Processor6 org.hibernate.util.JDBCExceptionReporter - No >>> operations allowed after connection closed.Connection was implicitly >>> closed by the driver. >>> ERROR TP-Processor6 org.hibernate.util.JDBCExceptionReporter - No >>> operations allowed after connection closed.Connection was implicitly >>> closed by the driver. >>> ERROR TP-Processor6 org.hibernate.util.JDBCExceptionReporter - No >>> operations allowed after connection closed.Connection was implicitly >>> closed by the driver. >>> ERROR TP-Processor6 org.hibernate.util.JDBCExceptionReporter - No >>> operations allowed after connection closed.Connection was implicitly >>> closed by the driver. >>> ERROR TP-Processor6 >>> org.apache.catalina.core.ContainerBase.[Catalina].[thejarbar.org].[/].[Faces >>> >>> Servlet]The registration code that leads to error is as follows: >>> Form:<!--Created by IntelliJ IDEA.User: ownerDate: 02.mai.2010Time: >>> 14:07:31To change this template use File | Settings | File >>> Templates.--><%...@page contentType="text/html" language="java" >>> %><%...@page >>> pageEncoding="UTF-8"%><%...@taglib uri="http://java.sun.com/jsf/core"; >>> prefix="f" %><%@ taglib prefix="h" uri="http://java.sun.com/jsf/html"; >>> %><html><head> <meta http-equiv="Content-Type" content="text/html; >>> charset=UTF-8" /> <title>The jar bar:: >>> register</title></head><f:view> <body >>> style="background-color:#7b68ee;margin:auto"> <div align="center"> >>> <div align="center" id="header"><jsp:include page="/header.jsp"/></div> >>> <div align="center" id="centred-content"style="border-width:3px; >>> border-style: solid; border-color: #7fffd4;width:800px"> <div >>> id="h1" align="center"> <h:outputText >>> value="#{registerMsg.h1}" style="color:white; >>> font-family:fantasy;font-size:x-large;"/> <div id="p1" >>> align="center"> <h:outputText >>> value="#{registerMsg.p1}" >>> style="font-size:large;margin-bottom:5em;color:white;"/> >>> <h:form> </h:form> </div> >>> <h:form> <h:panelGrid columns="2"> >>> <h:outputText value="*#{registerMsg.name}:" style="color:yellow;"/> >>> <h:inputText id="name" value="#{user.entity.firstName}" >>> title="#{registerMsg.nameTitle}"required="true"> >>> <f:validateLength minimum="3"maximum="30"/> >>> <h:message for="name"style="color:red;"/> >>> </h:inputText> <h:outputText >>> value="#{registerMsg.surname}:" style="color:yellow;"/> >>> <h:inputText id="surname" value="#{user.entity.lastName}" >>> title="#{registerMsg.surnameTitle}" required="false"> >>> <f:validateLength minimum="3"maximum="30"/> >>> <h:message for="surname" style="color:red;" /> >>> </h:inputText> <h:outputText >>> value="*#{registerMsg.email}:" style="color:yellow;"/> >>> <h:inputText id="email" value="#{user.entity.userEmail}" >>> title="#{registerMsg.emailTitle}"required="true"> >>> <f:validator validatorId="emailEValidate"/> >>> <f:validator validatorId="emailPValidate"/> >>> <h:message for="email" style="color:red;"/> >>> </h:inputText> <h:outputText >>> value="*#{registerMsg.userName}:" style="color:yellow;"/> >>> <h:inputText id="uName" value="#{user.entity.userName}" >>> title="#{registerMsg.userNameTitle}"required="true"> >>> <f:validator validatorId="uNameEValidate"/> >>> <f:validateLength maximum="20" minimum="6"/> >>> <h:message for="uName" style="color:red;"/></h:inputText> >>> <h:outputText value="*#{registerMsg.password}:" style="color:yellow;"/> >>> <h:inputSecret id="pass" value="#{user.entity.userPass}" >>> title="#{registerMsg.passwordTitle}*"required="true"> >>> <f:validateLength minimum="6"maximum="20" /> >>> <h:message for="pass" style="color:red;"/> >>> </h:inputSecret> </h:panelGrid> >>> <h:commandButton action="#{user.create}" >>> value="#{registerMsg.register}"style="color:#20b2aa;" /> >>> <br> </h:form> </div> <div >>> id="footer" align="center"> <jsp:include >>> page="/Footer.jsp"/> </div> </div> </div> >>> </body></f:view></html> Anyone have any thoughts as to why this is >>> happening? >>> >>> >>> >>> >>> No virus found in this incoming message. >>> Checked by AVG - www.avg.com >>> Version: 9.0.819 / Virus Database: 271.1.1/2904 - Release Date: 05/29/10 >>> 13:25:00 >>> >>> >>> >> > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
