[jboss-jira] [JBoss JIRA] (JGRP-1710) Messages get too large due to big headers (in large clusters)

[Bela Ban (JIRA)]

Bela Ban created JGRP-1710:
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             Summary: Messages get too large due to big headers (in large clusters)
                 Key: JGRP-1710
                 URL: https://issues.jboss.org/browse/JGRP-1710
             Project: JGroups
          Issue Type: Bug
            Reporter: Bela Ban
            Assignee: Bela Ban
             Fix For: 3.4


In some cases, messages get bigger than the max bundling size because of large headers:
{noformat}
ERROR Sep 30 17:33:08,096 | Timer-5,c0,172.29.189.9-svc9-ZM26S32728-59135 | [TP.java:1335] | (org) | 172.29.189.9-svc9-ZM26S32728-59135: failed sending message to 172.29.190.181-svc2-00832091-31665 (70850 bytes): java.lang.Exception: message size (70850) is greater than max bundling size (64000). Set the fragmentation/bundle size in FRAG and TP correctly, headers: GMS: GmsHeader[INSTALL_MERGE_VIEW]: view=MergeView::[172.29.190.174-svc6-00832251-874|27] (1479) ...
{noformat}

In the case of INSTALL_MERGE_VIEW, we send the full view (*not* the DeltaView) and the digest in the header. With 1479 members (as shown the the example above), this increases the message size beyond the max bundling size.

Possible SOLUTION
* Place the header fields in the message's buffer instead
* Move FRAG2 *under* GMS
** Investigate impact on flow control etc

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