[HBASE-16209] Provide an ExponentialBackOffPolicy sleep between failed region open requests

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.4.0, 2.0.0
• Hadoop Flags: Reviewed
• Assignee: Ashu Pachauri
• Reporter: Joseph
• Created: 11/Jul/16 17:58
• Updated: 02/Dec/16 06:21
• Resolved: 02/Dec/16 02:34

Description

Related to HBASE-16138. As of now we currently have no pause between retrying failed region open requests. And with a low maximumAttempt default, we can quickly use up all our regionOpen retries if the server is in a bad state. I added in a ExponentialBackOffPolicy so that we spread out the timing of our open region retries in AssignmentManager. Review board at https://reviews.apache.org/r/50011/