Region Split is executed when the system is down or the Region file in HDFS has been deleted.
The status of Region is tracked by master, including the following status.
|Offline||Region is offline|
|Pending Open||A request to open the region was sent to the server|
|Opening||The server has started opening the region|
|Open||The region is open and is fully operational|
|Pending Close||A request to close the region has been sent to the server|
|Closing||The server has started closing the region|
|Closed||The region is closed|
|Splitting||The server started splitting the region|
|Split||The region has been split by the serve|
Region migration (transition) between these states can be triggered either by the master or by the region server.
2.1 Use hbase hbck to find out which Region has Error
2.2 Remove the failed Region using the following command
2.3 restart hbase
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