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POResuming an application from sleep causes 'Communications link failure'
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2012-09-11T12:56:22.203
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I have a CloudBees Run@cloud instance configured that runs fine, but after a while of inactivity it gets de-activated, and then seems the connection pool is not properly refreshed. When I return to the site, the first few requests time out with: <pre><code>com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 4,746,680 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago. sun.reflect.GeneratedConstructorAccessor86.newInstance(Unknown Source) sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) java.lang.reflect.Constructor.newInstance(Constructor.java:513) com.mysql.jdbc.Util.handleNewInstance(Util.java:407) com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1116) com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3092) com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2978) com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3526) com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1989) com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2150) com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2620) com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:5022) org.apache.tomcat.dbcp.dbcp.DelegatingConnection.setAutoCommit(DelegatingConnection.java:371) org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.setAutoCommit(PoolingDataSource.java:328) org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:87) org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1473) </code></pre> I am connecting via JNDI using a datasource configured in the cloudbees-web.xml file as such: <pre><code> <resource name="jdbc/myapp" auth="Container" type="javax.sql.DataSource"> <param name="username" value="myuser" /> <param name="password" value="mypass" /> <param name="url" value="jdbc:cloudbees://myurl /> </resource> </code></pre> Is there some configuration I'm missing, or is this a bug with the connection pool configuration in the server?
Tags
<mysql><timeout><connection-pooling><cloudbees>
Title
Resuming an application from sleep causes 'Communications link failure'
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