Shawn Walker created ACCUMULO-4353: -------------------------------------- Summary: Stabilize tablet assignment Key: ACCUMULO-4353 URL: https://issues.apache.org/jira/browse/ACCUMULO-4353 Project: Accumulo Issue Type: Improvement Reporter: Shawn Walker Assignee: Shawn Walker Priority: Minor
When a tablet server dies, Accumulo attempts to reassign the tablets it was hosting as quickly as possible to maintain availability. If multiple tablet servers die in quick succession, such as from a rolling restart of the Accumulo cluster or a network partition, this behavior can cause a storm of reassignment and rebalancing, placing significant load on the master. To avert such load, Accumulo should be capable of maintaining a steady tablet assignment state in the face of transient tablet server loss. Instead of reassigning tablets as quickly as possible, Accumulo should be await the return of a temporarily downed tablet server (for some configurable duration) before assigning its tablets to other tablet servers. -- This message was sent by Atlassian JIRA (v6.3.4#6332)