[jbossts-issues] [JBoss JIRA] (JBTM-1989) Uid comparison fails for max uid

Michael Musgrove (JIRA) jira-events at lists.jboss.org
Thu Oct 17 13:14:02 EDT 2013

Michael Musgrove created JBTM-1989:

             Summary: Uid comparison fails for max uid
                 Key: JBTM-1989
                 URL: https://issues.jboss.org/browse/JBTM-1989
             Project: JBoss Transaction Manager
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Common
    Affects Versions: 5.0.0.M6
            Reporter: Michael Musgrove
            Assignee: Michael Musgrove
             Fix For: 4.17.14, 5.0.0.Final

The largest Uid (Uid.MAX_UID) is defined to have the string form 7fffffff:7fffffff:7fffffff:7fffffff:7fffffff
The first 2 components are hex values corresponding to Integer.MAX_INT but these two fields end up being converted into 2 longs to populate the field long[] hostAddr hostAddr. Consequently most Uids will end up being greater than MAX_UID (which causes problems when trying to order last resources last in the intentions list.

The fix is to use "7fffffffffffffff:7fffffffffffffff:7fffffff:7fffffff:7fffffff" for MAX_UID

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