[HBASE-9468] Previous active master can still serves RPC request when it is trying recovering expired zk session

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.98.0, 0.94.12, 0.96.0
• Hadoop Flags: Reviewed
• Release Note: Adds option to disable master's attempt at recovering zookeeper session: i.e. just fail. Set the fail-fast option when you have a backup master running that you can fail to.
• Assignee: Honghua Feng
• Reporter: Honghua Feng
• Created: 09/Sep/13 13:49
• Updated: 24/Sep/13 20:32
• Resolved: 11/Sep/13 18:01

Description

When the active master's zk session expires, it'll try to recover zk session, but without turn off its RpcServer. What if a previous backup master has already become the now active master, and some client tries to send request to this expired master by using the cached master info? Any problem here?