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https://issues.apache.org/jira/browse/CASSANDRA-7122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14347250#comment-14347250
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Tianqiang Liu commented on CASSANDRA-7122:
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The bug still happens. After running "nodetool removenode ip_address", the
corespondent record in "system.peers" has not been deleted. So I deleted the
record manually using cqlsh but the c++ driver still connected to that node.
Then I noticed the contents in "system.peers" tables of different nodes are
different, meaning we should delete the records in all nodes respectively.
After doing this, c++ driver never connected to the deleted node.
> Replacement nodes have null entries in system.peers
> ---------------------------------------------------
>
> Key: CASSANDRA-7122
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7122
> Project: Cassandra
> Issue Type: Bug
> Reporter: Richard Low
> Assignee: Brandon Williams
> Fix For: 1.2.17, 2.0.9, 2.1 rc1
>
> Attachments: 7122.txt
>
>
> If a node is replaced with -Dcassandra.replace_address, the new node has
> mostly null entries in system.peers:
> {code}
> > select * from system.peers;
> peer | data_center | host_id | rack | release_version | rpc_address |
> schema_version | tokens
> -----------+-------------+---------+------+-----------------+-------------+----------------+--------------------------
> 127.0.0.3 | null | null | null | null | null |
> null | {'-3074457345618258602'}
> {code}
> To reproduce, simply kill a node and replace it. The entries are correctly
> populated if the replacement node is restarted but they are never populated
> if it isn't.
> I can think of at least two bad consequences of this:
> 1. Drivers like Datastax java-driver use the peers table to find the
> rpc_address and location info of a node. If the entires are null it assumes
> rpc_address=ip and the node is in the local DC.
> 2. When using GossipingPropertyFileSnitch and node won't persist the DC/rack
> of another node so may not be able to locate it during restarts.
> I reproduced in 1.2.15 but from inspection it looks to be present in 1.2.16
> and 2.0.7.
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