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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-678) hbase needs a 'safe-mode'
Date Tue, 10 Jun 2008 22:19:45 GMT
hbase needs a 'safe-mode'

                 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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