hbase needs a 'safe-mode'
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Key: HBASE-678
URL: https://issues.apache.org/jira/browse/HBASE-678
Project: Hadoop HBase
Issue Type: Improvement
Reporter: stack
Priority: Minor
Internally we have a cluster of thousands of regions. We just did a hbase
restart w/ master on new node. Just so happened that one of the regionservers
was running extra slow (was downloaded by other processes). Meant that its
portion of the assigments was taking a long time to come up... While these
regions were stuck in deploy mode, the cluster is not useable.
We need a sort of 'safe-mode' in hbase where clients fail if they try to attach
to a cluster not yet fully up. UI should show when all assignments have been
successfully made so admin can at least see when they have a problematic
regionserver in their midst.
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