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  1. JBoss Enterprise Application Platform 4 and 5
  2. JBPAPP-7463 Upgrade JGroups to 2.6.22
  3. JBPAPP-9344

NAKACK retransmission request for message 0

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Details

    • Sub-task
    • Resolution: Done
    • Major
    • EAP_EWP 5.2.0
    • EAP_EWP 5.1.2
    • Clustering
    • None
    • Release Notes
    • Hide
      When requesting missing messages to be retransmitted, a node sometimes requested the latest received message instead of the missing one. If if had not previously received any messages from the member in these cases, it requested message 0 (which is invalid). This behaviour caused unnecessary retransmission requests and the following warning messages were logged:

      <screen>
      WARN [org.jgroups.protocols.pbcast.NAKACK] (OOB-19,10.1.1.1:55200) (requester=10.1.1.2:55200, local_addr=10.1.1.1:55200) message 10.1.1.1:55200::0 not found in retransmission table of 10.1.1.1:55200:
      [0 : 7 (7) (size=7, missing=0, highest stability=0)]
      </screen>

      With this update, JGroups do not request retransmission of message 0 or a message it already has received. As a result, no redundant retransmission requests are sent and the above mentioned warning messages are not logged.
      Show
      When requesting missing messages to be retransmitted, a node sometimes requested the latest received message instead of the missing one. If if had not previously received any messages from the member in these cases, it requested message 0 (which is invalid). This behaviour caused unnecessary retransmission requests and the following warning messages were logged: <screen> WARN [org.jgroups.protocols.pbcast.NAKACK] (OOB-19,10.1.1.1:55200) (requester=10.1.1.2:55200, local_addr=10.1.1.1:55200) message 10.1.1.1:55200::0 not found in retransmission table of 10.1.1.1:55200: [0 : 7 (7) (size=7, missing=0, highest stability=0)] </screen> With this update, JGroups do not request retransmission of message 0 or a message it already has received. As a result, no redundant retransmission requests are sent and the above mentioned warning messages are not logged.
    • Documented as Resolved Issue
    • NEW

    Description

      The following warning is logged. Since there is no message with ID 0, it should not be requested for retransmission.

      WARN [org.jgroups.protocols.pbcast.NAKACK] (OOB-19,10.1.1.1:55200) (requester=10.1.1.2:55200, local_addr=10.1.1.1:55200) message 10.1.1.1:55200::0 not found in retransmission table of 10.1.1.1:55200:
      [0 : 7 (7) (size=7, missing=0, highest stability=0)]

      It occurred during a FLUSH when a node is trying to join the cluster, in a network that is dropping some multicast packets.

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          is blocked by

          Bug - A problem that impairs or prevents the functions of the product. JGRP-1480 NAKACK retransmission request for message 0

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Resolved

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              rhn-support-dereed Dennis Reed
              rhn-support-dereed Dennis Reed
              Petr Penicka Petr Penicka (Inactive)
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                Created:
                Updated:
                Resolved: