[jboss-jira] [JBoss JIRA] (JGRP-1502) NAKACK / NAKACK2: modifying header of copy can still lead to side effects

[Bela Ban (JIRA)]

Bela Ban created JGRP-1502:
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             Summary: NAKACK / NAKACK2: modifying header of copy can still lead to side effects
                 Key: JGRP-1502
                 URL: https://issues.jboss.org/browse/JGRP-1502
             Project: JGroups
          Issue Type: Bug
            Reporter: Bela Ban
            Assignee: Bela Ban
             Fix For: 3.0.12, 3.2


NAKACK and NAKACK2 copy a message (e.g. for retransmission) and then modify the NakackHeader of the copy *in place*. However, as Message.copy() does *not* copy the headers themselves, only the array holding the references to the headers, the modification of NakackHeader will also modify the original message !
SOLUTION:
Create a new header off of the exitsing header and call Message.putHeader(), overwriting the old header. 

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