Synchronizing a corrupted Cassandra node

Cassandra is a replicated data store. Each Cassandra node contains a copy of all data. When a node is lost, it is sufficient to restore the node and sync the data from cluster to this node. No backups or snapshots are necessary.

To synchronize a corrupted Cassandra node, complete the following steps:

1. Uninstall the corrupted Cassandra node.
2. Delete the Global Mailbox Cassandra installation and directories.

   The data directories are defined in the cassandra.yaml file.

3. Reinstall Cassandra on that node with the same configuration.
4. Update the <install dir>/apache-cassandra/conf/cassandra-env.sh file with the following information: JVM_OPTS="$JVM_OPTS -Dcassandra.replace_address=<ip_address_of_this_node>
5. Start the Cassandra server.
6. Remove the JVM_OPTS="$JVM_OPTS -Dcassandra.replace_address=<ip_address_of_this_node> line from the cassandra-env.sh file.
7. Make sure that the Cassandra Reaper tool is running. The Reaper will automatically repair the node, for details refer to Checking repair status.