Shawn Walker created ACCUMULO-4353:
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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.
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