title: tomcat 6.0.24 Exception: Could not load com.mysql.jdbc.SQLError
body: <p>My tomcat 5 server running on centos frequently (several times / day) produces the following error:</p>
  
  <pre><code>Apr 7, 2011 11:02:30 PM org.apache.catalina.loader.WebappClassLoader loadClass
  INFO: Illegal access: this web application instance has been stopped already.  Could not load com.mysql.jdbc.SQLError.  The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
  java.lang.IllegalStateException
          at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1370)
          at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1329)
          at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3291)
          at com.mysql.jdbc.MysqlIO.quit(MysqlIO.java:1665)
          at com.mysql.jdbc.ConnectionImpl.realClose(ConnectionImpl.java:4411)
          at com.mysql.jdbc.ConnectionImpl.cleanup(ConnectionImpl.java:1315)
          at com.mysql.jdbc.ConnectionImpl.finalize(ConnectionImpl.java:2761)
          at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
          at java.lang.ref.Finalizer.runFinalizer(Unknown Source)
          at java.lang.ref.Finalizer.access$100(Unknown Source)
          at java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)
  </code></pre>
  
  <p>tomcat's lib directory contains mysql-connector-java-5.1.8-bin.jar and mysql-connector-java-5.1.6-bin.jar, while the WEB-INF/lib directory only contains mysql-connector-java-5.1.8-bin.jar.  All three jar files contain the SQLError class.</p>
  
  <p>I'd like to eliminate this exception.  Could tomcat be looking somewhere else to try to find this class?</p>