Check the service status for Hadoop HDFS / HBase / OpenTSDB

To execute these procedures described in this page is required to be connected to *dev* or *prod* through *vnc*.

## Check Hadoop HDFS Status

Visit the URL: http://192.168.30.81:50070/dfshealth.html

Restart this service may corrupt the HBase data.

## Check HBase Status

Visit: http://192.168.30.83:16010/master-status

The URL above must show at least one *Region Server*. If the page is not available, the HBase is off-line.

### Maintainance

* Restart the *Master* connected on the *dev* server:

“`
$ lxc-attach -n hb-node3 — /etc/init.d/hbase-master restart
“`

* Restart the *Region-server* connected on the *dev* server:

“`
$ lxc-attach -n hb-node4 — /etc/init.d/hbase-regionserver restart
“`

## Check OpenTSDB Status

Visit: http://192.168.30.80:4242

### Maintainance

OpenTSDB may create a large cache over long periods of use. Restarting it may free 90% of its memory used

* Restart OpenTSDB servers:

“`
$ for i in 3 4; do lxc-attach -n hb-node$i — /etc/init.d/opentsdb restart && sleep 10 ; done
“`