Bug #8498 ExceptionInInitializerError
Submitted: 14 Feb 2005 13:57 Modified: 14 Feb 2005 15:22
Reporter: Francois Guillemette Email Updates:
Status: Closed Impact on me:
Category:Connector / J Severity:S1 (Critical)
Version:3.1.16 OS:Windows (Windows XP SP2)
Assigned to: CPU Architecture:Any

[14 Feb 2005 13:57] Francois Guillemette
	at com.mysql.jdbc.SQLError.<clinit>(SQLError.java:89)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2834)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1534)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1625)
	at com.mysql.jdbc.Connection.execSQL(Connection.java:2291)
	at com.mysql.jdbc.Connection.execSQL(Connection.java:2226)
	at com.mysql.jdbc.Statement.executeQuery(Statement.java:1159)
	at org.apache.commons.dbcp.DelegatingStatement.executeQuery(DelegatingStatement.java:162)
	at org.apache.commons.dbcp.PoolableConnectionFactory.validateObject(PoolableConnectionFactory.java:221)
	at org.apache.commons.pool.impl.GenericObjectPool.returnObject(Unknown Source)
Caused by: java.lang.NullPointerException
	at com.mysql.jdbc.Messages.getString(Messages.java:70)
	at com.mysql.jdbc.Util.stackTraceToString(Util.java:118)
	at com.mysql.jdbc.Messages.<clinit>(Messages.java:50)
	... 48 more

I'm using Java 1.4.1_06, Tomcat 4.0. The Message.class.getClassLoader() method may return null. (Javadoc for getClassLoader() : Some implementations may use null to represent the bootstrap class loader.).  The method getBundle() of ResourceBundle class must not have any null value for parameter.

How to repeat:
Use an implementation that return null when calling the method getClassLoader().

Suggested fix:
static {
		try {
		  ClassLoader cl = Messages.class.getClassLoader();
		  if (cl != null) {
				RESOURCE_BUNDLE = ResourceBundle.getBundle(BUNDLE_NAME, 
			else {
				RESOURCE_BUNDLE = ResourceBundle.getBundle(BUNDLE_NAME, 
		} catch (Throwable t) {
			throw new RuntimeException("Can't load resource bundle due to underlying exception " + t.toString() + "\n\nStack Tace:\n\n" + Util.stackTraceToString(t));
[14 Feb 2005 15:19] Mark Matthews
Thank you for your bug report. This issue has been committed to our
source repository of that product and will be incorporated into the
next release.

If necessary, you can access the source repository and build the latest
available version, including the bugfix, yourself. More information 
about accessing the source trees is available at
[14 Feb 2005 15:22] Mark Matthews
This was a known issue, which was already fixed for 3.1.7. You can test it via a nightly snapshot from http://downloads.mysql.com/snapshots.php#connector-j