http://www.datastax.com/support-forums/topic/error-loading-cluster-no-cassandra-connections-available Software, Support, and Training for Apache Cassandra en-US Sun, 19 May 2013 17:23:13 +0000 http://bbpress.org/?v=1.0.3 q http://www.datastax.com/support-forums/search.php http://www.datastax.com/support-forums/topic/error-loading-cluster-no-cassandra-connections-available#post-7487 Tue, 13 Nov 2012 17:14:19 +0000 thobbs 7487@http://www.datastax.com/support-forums/ <p>Tamar,</p> <p>That log message indicates that opscenterd (the main daemon) cannot connect to your nodes over Thrift. First, make sure OpsCenter has an update set of node IP addresses by looking at the "Edit Cluster" page of OpsCenter. Second, make sure you don't have any firewalls preventing outside access to port 9160; you can test this by attempting to connect to nodes from the machine opscenterd is running on using cassandra-cli.</p> <p>(P.S. In the future, please start a new thread for new issues.) </p> http://www.datastax.com/support-forums/topic/error-loading-cluster-no-cassandra-connections-available#post-7482 Tue, 13 Nov 2012 12:55:46 +0000 TamarFraenkel 7482@http://www.datastax.com/support-forums/ <p>I am having the same issue after replacing a node in the cluser.<br /> In the log I see</p> <p>2012-11-13 12:50:48+0000 [] Error fetching metric data:<br /> Traceback (most recent call last):<br /> Failure: opscenterd.CassandraService.NoCassandraConnection: No Cassandra connections available</p> <p>2012-11-13 12:50:48+0000 [] Error fetching metric data:<br /> Traceback (most recent call last):<br /> Failure: opscenterd.CassandraService.NoCassandraConnection: No Cassandra connections available </p> http://www.datastax.com/support-forums/topic/error-loading-cluster-no-cassandra-connections-available#post-167 Thu, 16 Jun 2011 00:04:28 +0000 blueplastic 167@http://www.datastax.com/support-forums/ <p>Hello Saint,</p> <p>Which version of OpsCenter and Cassandra are you running?</p> <p>What does the OpsCenter log show? It's located at /var/log/opscenter/opscenterd.log</p> <p>Copying and Pasting the relevant parts of the log file would help us troubleshoot.</p> <p>Did you use the DataStax Brisk AMI to launch the cluster or install OpsCenter yourself in a cluster? </p> <p>Are all the correct ports open? OpsCenter intra-node monitoring ports are anything over 1024. So TCP ports 1024 - 65535 should be open for traffic originating from within the cluster. The OpsCenter website port is 8888, but that's not where the problem appears to be.</p> <p>- Sameer </p> http://www.datastax.com/support-forums/topic/error-loading-cluster-no-cassandra-connections-available#post-165 Wed, 15 Jun 2011 20:37:17 +0000 TheSaint 165@http://www.datastax.com/support-forums/ <p>Any ideas as to the cause of this error when OpsCenter starts? </p>