hbase Rolling Restarts

1. Unpack your release, make sure of its configuration, and then rsync it across
the cluster. If you are using version 0.90.2, patch it with HBASE-3744 and
HBASE-3756.
2. Run hbck to ensure the cluster is consistent:
$ ./bin/hbase hbck
Effect repairs if inconsistent.
3. Restart the master:
$ ./bin/hbase-daemon.sh stop master; ./bin/hbase-daemon.sh start master
4. Disable the region balancer:
$ echo "balance_switch false" | ./bin/hbase shell
5. Run the graceful_stop.sh script per region server. For example:
$ for i in `cat conf/regionservers|sort`; do ./bin/graceful_stop.sh \
--restart --reload --debug $i; done &> /tmp/log.txt &
If you are running Thrift or REST servers on the region server, pass the --thrift
or --rest option, as per the script’s usage instructions, shown earlier (i.e., run it
without any commandline options to get the instructions).
6. Restart the master again. This will clear out the dead servers list and reenable the
balancer.
7. Run hbck to ensure the cluster is consistent.