[HDFS-7121] For JournalNode operations that must succeed on all nodes, execute a pre-check to verify that the operation can succeed.

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: journal-node
• Assignee: Chris Nauroth
• Reporter: Chris Nauroth
• Created: 22/Sep/14 18:15
• Updated: 06/Jan/17 22:04

Description

Several JournalNode operations are not satisfied by a quorum. They must succeed on every JournalNode in the cluster. If the operation succeeds on some nodes, but fails on others, then this may leave the nodes in an inconsistent state and require operations to do manual recovery steps. For example, if doPreUpgrade succeeds on 2 nodes and fails on 1 node, then the operator will need to correct the problem on the failed node and also manually restore the previous.tmp directory to current on the 2 successful nodes before reattempting the upgrade.