[jboss-jira] [JBoss JIRA] Created: (JGRP-1251) NAKACK: overwriteDigest() doesn't adjust sequence number

[Bela Ban (JIRA)]

NAKACK: overwriteDigest() doesn't adjust sequence number
--------------------------------------------------------

                 Key: JGRP-1251
                 URL: https://jira.jboss.org/browse/JGRP-1251
             Project: JGroups
          Issue Type: Bug
            Reporter: Bela Ban
            Assignee: Bela Ban
             Fix For: 2.12


NAKACK.overwriteDigest() is used by the 2 state transfer protocols (STATE_TRANSFER and STREAMING_STATE_TRANSFER).

When A has a digest A:250,B:10,C:160, and gets the state (as a result of calling JChannel.getState() with a digest of A:230,B:10,C:160, it'll set its own digest to A:230 (from A:250). 

However, A's sequence number (seqno) will remain at 250 ! This means, when A sends the next message, it'll send A:251, but because we set the digest to A:230, A will ask itself to retransmit messages A:230-250 !

SOLUTION: when receiving digest A:230, A should set its seqno to 230
WORKAROUND: use FLUSH, which doesn't ship digests on state transfer

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira