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https://issues.apache.org/jira/browse/ACCUMULO-4353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15347266#comment-15347266
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marco polo edited comment on ACCUMULO-4353 at 6/23/16 9:46 PM:
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Are you attempting to design a mechanism that could be used to avoid
re-balancing and have the master keep assignments where they were previously,
knowing that servers will come back into operation?
I only ask because I question why the load on the master is a problem. You will
cause load since clients will persist for that length of time. Wont' you
increase the number of thrift connections waiting since you may not re-balance
for some time?
was (Author: phrocker):
Are you attempting to design a mechanism that could be used to avoid
re-balancing and have the master keep assignments where they were previously,
knowing that servers will come back into operation?
> Stabilize tablet assignment during transient failure
> ----------------------------------------------------
>
> 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
> Time Spent: 10m
> Remaining Estimate: 0h
>
> 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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