API Gateway and API Manager make use of Apache Cassandra for data storage with the KPS and OAuth implementations.

In API Gateway version 7.5.1 and later Cassandra runs as an external process, previously it was embedded in the API Gateway instances. Cassandra is bundled with the API Gateway installer.

Cassandra Unexpected Termination

In the event that a Cassandra node crashes or dies unexpectedly then the following information should be gathered :-

• The Cassandra conf and logs folder (Including any custom conf or logs configured)
• Any core-dumps present in Cassandra /bin or where Cassandra was started from
• Any maintenance or system activity going on at the time of the incident
• The OS type and kernel version
• The result of checking /var/log for OOM (Out of Memory) killer messages using

sudo grep -i -r 'killed process' /var/log/

Troubleshooting

A good place to start any troubleshooting is the Datastax index page

http://docs.datastax.com/en/dse-trblshoot/doc/