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https://issues.apache.org/jira/browse/CASSANDRA-5565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13657165#comment-13657165
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Rick Branson edited comment on CASSANDRA-5565 at 5/14/13 4:11 PM:
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After thinking about this a bit, I think the right approach is to have the rest
of the cluster reject nodes that try to connect with an existing broadcast
address and a different hostID / token set. I tried to think through the
various scenarios, and I can't think of any legitimate reason you'd need to do
this. An ERROR-level log should be spit out on the nodes that rejected the
connection with something like: "/<IP> attempted to join with different host ID
/ token(s). If this is intentional, please use 'nodetool removenode <hostID>'
to safely remove the previous host ID from the cluster."
I can work up a patch for this if others think this is a solid approach.
Maybe we also need a -force option on nodetool removenode to provide access to
the previous behavior?
was (Author: rbranson):
After thinking about this a bit, I think the right approach is to have the
rest of the cluster reject nodes that try to connect with an existing broadcast
address and a different hostID / token set. I tried to think through the
various scenarios, and I can't think of any legitimate reason you'd need to do
this. An ERROR-level log should be spit out on the nodes that rejected the
connection with something like: "/{IP} attempted to join with different host ID
/ token(s). If this is intentional, please use 'nodetool removenode {hostID}'
to safely remove the previous host ID from the cluster."
I can work up a patch for this if others think this is a solid approach.
Maybe we also need a -force option on nodetool removenode to provide access to
the previous behavior?
> Peer entry drops from system table silently when bootstrapping a node with an
> existing IP.
> ------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-5565
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5565
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.2.4
> Reporter: Rick Branson
>
> It looks like CASSANDRA-5167 introduced a bit of a regression. I needed to
> rebuild the data on a malfunctioning node by rebootstrapping it. I did this
> by cleaning the host and restarting Cassandra. My plan was to remove the old
> hostID once it had successfully bootstrapped.
> No errors were encountered, but the old host ID of the node before the wipe
> was completely dropped from the peers table because they had the same IP
> address, and therefore the data ranges were moved around. This resulted in a
> large number of CL.ONE reads coming back empty.
> There might be a better approach to this rebootstrap process, but it seems
> like it's dangerous to just drop the peer from the table, especially without
> any kind of log message.
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