HBase troubleshooting
In this recipe, we will look at HBase troubleshooting and how to identify some of the common issues in the HBase cluster.
Getting ready
Make sure that the user has completed the Setting up multi-node HBase cluster recipe in Chapter 9, HBase Administration for this section, and the assumption is that HDFS and YARN are working fine. Refer to previous recipes to troubleshoot any issues with the Hadoop cluster, before starting troubleshooting of HBase.
How to do it...
- Connect to the
master1.cyrus.com
master node and switch to userhadoop
. - Firstly, make sure ZooKeeper is up and the ensemble is healthy, as shown in the following screenshot — this is only if an external ZooKeeper is used:
- Rather than starting the entire cluster in one go, start each component one-by-one. Start
hbase
master using the following command:$ hbase-daemon.sh start master
- Quickly check which nodes and services the HBase master is talking to. In the following screenshot, we can see connections to...