[HDFS-5773] NN may reject formerly dead DNs

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Not A Problem
• Affects Version/s: 2.0.0-alpha, 0.23.10, 3.0.0-alpha1
• Target Version/s: 2.0.0-alpha
• Assignee: Rushabh Shah
• Reporter: Daryn Sharp
• Created: 14/Jan/14 23:08
• Updated: 12/May/16 18:16
• Resolved: 23/Apr/14 16:14

Description

If the heartbeat monitor declares a node dead, it may never allow a DN to rejoin. The NN will generate messages like "Got blockReceivedDeleted message from unregistered or dead node".

There appears to be a bug where the the isAlive flag is not set to true when a formerly known DN attempts to rejoin.