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Brandon Williams edited comment on CASSANDRA-16718 at 9/7/21, 8:31 PM:
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-This issue boils down to CASSANDRA-10134 loading the ring state, which
includes preferred_ip.- OTC then queries this directly if it exists and uses
it before any changes can be learned. Given this, I'm not sure it even makes
sense to store the preferred_ip, since if we try to use it eagerly we'll never
be able to learn of the change to it, as this issue exemplifies. I think the
best plan is just to remove this optimization and do the reconnection dance
every time, which still shouldn't be super-often. WDYT, [~samt]?
-In the meantime, operators may add {{-Dcassandra.load_ring_state=false}} if
that's an acceptable workaround.-
was (Author: brandon.williams):
-This issue boils down to CASSANDRA-10134 loading the ring state, which
includes preferred_ip.- OTC then queries this directly if it exists and uses
it before any changes can be learned. Given this, I'm not sure it even makes
sense to store the preferred_ip, since if we try to use it eagerly we'll never
be able to learn of the change to it, as this issue exemplifies. I think the
best plan is just to remove this optimization and do the reconnection dance
every time, which still shouldn't be super-often. WDYT, [~samt]?
In the meantime, operators may add {{-Dcassandra.load_ring_state=false}} if
that's an acceptable workaround.
> Changing listen_address with prefer_local may lead to issues
> ------------------------------------------------------------
>
> Key: CASSANDRA-16718
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16718
> Project: Cassandra
> Issue Type: Bug
> Components: Local/Config
> Reporter: Jan Karlsson
> Assignee: Brandon Williams
> Priority: Normal
> Fix For: 3.11.x, 4.0.x
>
>
> Many container based solution function by assigning new listen_addresses when
> nodes are stopped. Changing the listen_address is usually as simple as
> turning off the node and changing the yaml file.
> However, if prefer_local is enabled, I observed that nodes were unable to
> join the cluster and fail with 'Unable to gossip with any seeds'.
> Trace shows that the changing node will try to communicate with the existing
> node but the response is never received. I assume it is because the existing
> node attempts to communicate with the local address during the shadow round.
>
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