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https://issues.apache.org/jira/browse/HADOOP-2251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12545242
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Jim Kellerman commented on HADOOP-2251:
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This should be corrected with the latest commit for HADOOP-2139
> [hbase] master won't go down if root region was not found
> ---------------------------------------------------------
>
> Key: HADOOP-2251
> URL: https://issues.apache.org/jira/browse/HADOOP-2251
> Project: Hadoop
> Issue Type: Bug
> Components: contrib/hbase
> Reporter: stack
> Assignee: Jim Kellerman
> Priority: Minor
>
> psaab couldn't shut down his master... was getting reams of the below:
> {code}
> 2007-11-21 13:45:30,421 INFO hbase.HMaster - process shutdown of server
> 38.99.76.15:60020: logSplit: true, rootChecked: true, rootRescanned: false,
> numberOfMetaRegions: 0, onlineMetaRegions.size(): 0
> 2007-11-21 13:45:30,421 DEBUG hbase.HMaster - process server shutdown
> scanning root region cancelled because rootRegionLocation is null
> 2007-11-21 13:45:30,421 DEBUG hbase.HMaster - Put PendingServerShutdown of
> 38.99.76.15:60020 back on queue
> 2007-11-21 13:45:30,421 DEBUG hbase.HMaster - Main processing loop:
> PendingServerShutdown of 38.99.76.21:60020
> 2007-11-21 13:45:30,422 INFO hbase.HMaster - process shutdown of server
> 38.99.76.21:60020: logSplit: true, rootChecked: true, rootRescanned: false,
> numberOfMetaRegions: 0, onlineMetaRegions.size(): 0
> 2007-11-21 13:45:30,422 DEBUG hbase.HMaster - process server shutdown
> scanning root region cancelled because rootRegionLocation is null
> 2007-11-21 13:45:30,422 DEBUG hbase.HMaster - Put PendingServerShutdown of
> 38.99.76.21:60020 back on queue
> 2007-11-21 13:45:30,422 DEBUG hbase.HMaster - Main processing loop:
> PendingServerShutdown of 38.99.76.31:60020
> 2007-11-21 13:45:30,422 INFO hbase.HMaster - process shutdown of server
> 38.99.76.31:60020: logSplit: true, rootChecked: true, rootRescanned: false,
> numberOfMetaRegions: 0, onlineMetaRegions.size(): 0
> 2007-11-21 13:45:30,422 DEBUG hbase.HMaster - process server shutdown
> scanning root region cancelled because rootRegionLocation is null
> 2007-11-21 13:45:30,422 DEBUG hbase.HMaster - Put PendingServerShutdown of
> 38.99.76.31:60020 back on queue
> 2007-11-21 13:45:30,422 DEBUG hbase.HMaster - Main processing loop:
> PendingServerShutdown of 38.99.76.17:60020
> ..
> {code}
> Looks like a shutdown soon after startup so should be reproducible.
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