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From "Tyler Hobbs (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-5769) Not all STATUS_CHANGE UP events reported via the native protocol
Date Wed, 17 Jul 2013 18:41:46 GMT


Tyler Hobbs commented on CASSANDRA-5769:

Yes, I can reliably reproduce the issue (through the python driver) with those steps using
> Not all STATUS_CHANGE UP events reported via the native protocol
> ----------------------------------------------------------------
>                 Key: CASSANDRA-5769
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.2.5, 1.2.6
>         Environment: Uubuntu 12.04, x86, 64 bit
>            Reporter: Duncan Sands
>            Assignee: Tyler Hobbs
>            Priority: Minor
> Not all gossip UP events are pushed to native protocol users who have registered for
them.  This seems to be a native protocol issue because nodes themselves get the UP event
(as seen in their logs).  I can consistently reproduce this issue as follows:
> 1) connect a client to a cluster node ("node1") using the native protocol, register for
TOPOLOGY_CHANGE and STATUS_CHANGE events.  (Probably you only need to register for STATUS_CHANGE
to see this, however my client registers for both).
> 2) on another node ("node2"), send SIGSTOP to the Cassandra process.
> 3) after about 30 seconds the client gets pushed a STATUS_CHANGE DOWN event for the stopped
> 4) on node2, send SIGCONT to the the Cassandra process.
> 5) wait forever to get a STATUS_CHANGE UP event.  This is failure: no event is ever received.
> Observe that node1 does know that node2 is back up: in its system log I see for example
>   INFO [GossipStage:1] 2013-07-17 14:27:41,238 (line 771) InetAddress /
is now UP
> shortly after sending SIGCONT to the stopped process.
> To eliminate the possibility that my client is at fault, I performed the following sanity
> 2') on node2, stopped Cassandra nicely using: sudo service cassandra stop
> 4') on node2, restarted Cassandra using: sudo service cassandra start
> In this case the client soon after gets a STATUS_CHANGE DOWN event followed by a STATUS_CHANGE
UP event for node2.

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