[CASSANDRA-8175] Extend existing endpoint check to also check when restarting normally

• Type: Improvement
• Status: Open
• Priority: Normal
• Resolution: Unresolved
• Fix Version/s: 2.1.x
• Assignee: Brandon Williams
• Reporter: Brandon Williams

Authors

Brandon Williams

• Created: 23/Oct/14 16:14
• Updated: 16/Apr/19 09:31

Description

In CASSANDRA-5571 we added a check in shadow gossip to see if there was an existing node in gossip, but only if we bootstrap. The scenario I want to prevent here is similar, but slightly different. If someone restores a node to their development environment for whatever reason, they have a good chance of accidentally joining that node to the production cluster since it will know about the production cluster from the system table, and now this node will also have a higher generation than the existing one, causing a host id collision and knocking it out of the ring (except in its own view.) Instead what I'd like to do is always do a shadow gossip round at startup, and check for conflicting host ids. Obviously we'll want to bypass this for replacement.

Issue Links

• depends upon: CASSANDRA-8072 Exception during startup: Unable to gossip with any seeds