[JBoss-user] [Persistence & CMP/JBoss] - DB connection can't be found after JBoss has been running fo

[AlexM <nu...@jb...>]

Hi All,

I am using JBoss 3.2.5 with MySQL 4.0.20. Since I am still debugging and testing my application, I frequently redeploy it. Sometimes, I get exceptions related to MySQL like the one below, which occurred this morning although when I left last night everything worked fine. I have to restart JBoss to work around this. Isn't there a more elegant way to deal with this?

Thanks,
Alex

2004-10-14 10:08:14,178 WARN  [org.jboss.resource.connectionmanager.JBossManagedConnectionPool] Throwable while attempting to get a new connection: null
org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (java.sql.SQLException: Could not create socket factory 'com.mysql.jdbc.StandardSocketFactory' due to underlying exception: java.lang.NullPointerException
                                                                                             
** BEGIN NESTED EXCEPTION **
                                                                                             
java.lang.NullPointerException
STACKTRACE:
                                                                                             
java.lang.NullPointerException
        at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:143)
        at org.jboss.mx.loading.UnifiedClassLoader3.loadClassImpl(UnifiedClassLoader3.java:178)
        at org.jboss.mx.loading.UnifiedClassLoader3.loadClass(UnifiedClassLoader3.java:132)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
        at sun.misc.Unsafe.defineClass(Native Method)
        at sun.reflect.ClassDefiner.defineClass(ClassDefiner.java:45)
        at sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:381)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.reflect.MethodAccessorGenerator.generate(MethodAccessorGenerator.java:377)
        at sun.reflect.MethodAccessorGenerator.generateConstructor(MethodAccessorGenerator.java:76)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:30)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
        at java.lang.Class.newInstance0(Class.java:308)
        at java.lang.Class.newIn        at com.mysql.jdbc.MysqlIO.createSocketFactory(MysqlIO.java:2209)
        at com.mysql.jdbc.MysqlIO.(MysqlIO.java:219)
        at com.mysql.jdbc.Connection.createNewIO(Connection.java:1768)
        at com.mysql.jdbc.Connection.(Connection.java:440)
        at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:400)
        at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:158)
        at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.createConnectionEventListener(InternalManagedConnectionPool.java:504)
        at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:214)
        at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:534)
        at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:444)
        at org.jboss.resource.connectionmanager.TxConnectionManager.getManagedConnection(TxConnectionManager.java:312)
        at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:496)
        at org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManager2.java:887)
        at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:102)
stance(Class.java:261)



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