[jboss-jira] [JBoss JIRA] Closed: (JGRP-417) ConnectionTable.run / ClassCastException with IBM Java 1.5

[Yves Martin (JIRA)]

     [ http://jira.jboss.com/jira/browse/JGRP-417?page=all ]

Yves Martin closed JGRP-417.
----------------------------

    Fix Version/s: 2.x
                       (was: 2.5)
       Resolution: Out of Date

A big mistake. Sorry.

> 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
>             Fix For: 2.x
>
>
> 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

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