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  1. JGroups
  2. JGRP-1963

TCP_NIO2 starts dropping messages

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Details

    • Bug
    • Status: Resolved (View Workflow)
    • Critical
    • Resolution: Done
    • 3.6.5
    • 3.6.6
    • None

    Description

      At some point, TCP_NIO2 starts dropping messages, at either the send or receive direction (still need to find out). This shows itself when e.g. a JOIN fails: the joiner sends a lot of JOIN-REQ messages and gets JOIN-RSP msgs from the coord, but doesn't receive them.
      If GMS.max_join_attempts="0", then this goes on forever, or until the joiner doesn't discover any nodes anymore.
      probe.sh jmx=UNICAST3.printConnections shows that messages are sent but no acks are received.
      Clearing the connection table in TCP_NIO2 fixes the problem: probe.sh op=TCP_NIO2.clearConnections.
      This shows that the issue is indeed in TCP_NIO2. Also, TCP and UDP work.

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              Created:
              Updated:
              Resolved: