Ensuring ZooKeeper watchdog process is started in the available data center

When there is an unplanned data center outage, you must ensure that the ZooKeeper watchdog processes are started in the data center that is online.

About this task

To ensure ZooKeeper watchdog process is started in the data center that is online:

Procedure

  1. Ensure the ZooKeeper watchdog process is enabled on all ZooKeeper nodes in the available data center. For information about ZooKeeper watchdog, see ZooKeeper watchdog and watchdog.properties file.
  2. In the data center that is online and available, start the ZooKeeper watchdog process on each ZooKeeper node. Go to the <install_Dir>/MailboxUtilities/bin directory and run the startGMCoordinateWatchdog.sh script.

    <InstallDIR> is the directory where Cassandra and ZooKeeper nodes are installed.