[MB-4592] Node stuck in a compatible master election mode Created: 27/Dec/11  Updated: 07/Jan/12  Resolved: 28/Dec/11

Status: Resolved
Project: Couchbase Server
Component/s: ns_server
Affects Version/s: 1.8.0
Fix Version/s: 1.8.0
Security Level: Public

Type: Bug Priority: Major
Reporter: Aliaksey Artamonau Assignee: Aliaksey Artamonau
Resolution: Fixed Votes: 0
Labels: 1.8.0-release-notes
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified


 Description   
https://s3.amazonaws.com/bugdb/jira/MB-4584/node_26.log.gz

This node stuck forever in compatible mode of master election. This means that it does not sent its version in heartbeats. And also it ignores versions sent with heartbeats from other nodes. Thus in unfortunate case if this is a master it will be impossible for the newer node to take over the mastership.

Unfortunately the reason why the node stuck in this state is not completely clear. It removed itself from the list of nodes supporting versioning when it apparently received a notification about the node list change. And the list did not contain the node itself. But the cause of such notification is not known.

 Comments   
Comment by Aleksey Kondratenko [ 28/Dec/11 ]
fixed in http://review.couchbase.org/11904 that's already merged
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