ConnectionTable.run / ClassCastException with IBM Java 1.5 ---------------------------------------------------------- Key: JGRP-417 URL: http://jira.jboss.com/jira/browse/JGRP-417 Project: JGroups Issue Type: Bug Affects Versions: 2.2.9 SP4 Environment: $ java -version java version "1.5.0" Java(TM) 2 Runtime Environment, Standard Edition (build pxi32devifx-20061107 (iFix 111765: SR3 + 111700) ) IBM J9 VM (build 2.3, J2RE 1.5.0 IBM J9 2.3 Linux x86-32 j9vmxi3223-20061001 (JIT enabled) J9VM - 20060915_08260_lHdSMR JIT - 20060908_1811_r8 GC - 20060906_AA) JCL - 20061107 Reporter: Yves Martin Assigned To: Bela Ban Priority: Critical When migrating a project to IBM Java 1.5, I get the following warning from ConnectionTable: ConnectionTable.run(): exception is java.lang.ClassCastException: IpAddress.compareTo(): comparison between different classes And communication times out. The same code works perfectly well with Sun Java 1.5.0_07 The drop stack trace show it comes from Hashtable.contains. After comparison between Sun src.zip and IBM src.jar for Hashtable, . Sun does entry.equals(value) . IBM does value.equals(entry) As a result, JGroups happens to do a IpAddress.equals(Connection) with IBM JVM and fails. Whereas Connection.equals(IpAddress) is properly handled in case of Sun JVM. Patch is trivial but the bug analysis was difficult !! Here is a valid IpAddress.equals method. public boolean equals(Object obj) { if (obj == null || !(obj instanceof IpAddress)) return false; return compareTo(obj) == 0 ? true : false; } Thank you in advance to include this patch in JGroups 2.2.9 so that JBoss 4.0.x may work one day with IBM Java 1.5 -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira