General troubleshooting steps
Basic troubleshooting for resolving errors include checking firewalls, logs, and prior installs.
Ensure firewalls are properly opened between the opscenterd machine and each node.
Check the following files on any of the nodes having problems for any errors:
- /var/log/cassandra/system.log
- /var/log/datastax-agent/agent.log
Verify that Cassandra (or DSE) was not previously installed on any of the machines; if it was, all binaries, configuration files, logs, etc. must be cleared out first.