Logs for splunk do not flow after the following error.
ERROR KVStoreIntrospection failed to get introspection data
ERROR KVStoreBulletinBoardManager Failed to start KV Store process. See mongod.log and splunkd.log for details.
ERROR KVStoreConfigurationProvider Could not start mongo instance. Initialization failed.
ERROR KVStoreConfigurationProvider Could not get ping from mongod.
ERROR KVStoreBulletinBoardManager KV Store changed status to failed. KVStore process terminated.
ERROR KVStoreBulletinBoardManager KV Store process terminated abnormally (exit code 14, status exited with code 14). See mongod.log and splunkd.log for details.
Have you checked mongod.log and splunkd.log for more details as suggested?