http://www.datastax.com/support-forums/topic/problem-occuring-during-evaluating-datastax-opscenter Software, Support, and Training for Apache Cassandra en-US Tue, 18 Jun 2013 21:51:50 +0000 http://bbpress.org/?v=1.0.3 q http://www.datastax.com/support-forums/search.php http://www.datastax.com/support-forums/topic/problem-occuring-during-evaluating-datastax-opscenter#post-846 Wed, 14 Dec 2011 06:39:53 +0000 nickmbailey 846@http://www.datastax.com/support-forums/ <p>This could be caused by a number of problems. The most common is a misconfiguration in the thrift interface or port. In '/etc/opscenter/opscenterd.conf' you should set the 'seed_hosts' property to the same interface which 1 or 2 of nodes in your cluster are listening on. Also if you changed the rpc_port in your cassandra configuration you should update the api_port setting in your opscenter conf accordingly. These interfaces and ports will need to be open in any firewalls you have set up.</p> <p>If that configuration doesn't seem to be the issue here, please attach the contents of '/var/log/opscenter/opscenterd.log', and I can further debug what the problem might be. </p> http://www.datastax.com/support-forums/topic/problem-occuring-during-evaluating-datastax-opscenter#post-844 Wed, 14 Dec 2011 06:27:34 +0000 Anonymous 844@http://www.datastax.com/support-forums/ <p>Hello Mr. Nick,</p> <p>opsCenter has started successfully after making above changes that you have posted but still it is not able to connect to cassandra please suggest.</p> <p>Following error occurred in browser window</p> <p>====================================================================================<br /> Error Loading OpsCenter x</p> <p>OpsCenter has not established a connection to your Cassandra cluster.</p> <p>If you have just started or restarted OpsCenter, allow a moment for it to connect and then refresh your browser. If you are still having problems connecting, make sure that OpsCenter is correctly configured to connect to your Cassandra cluster, and then restart OpsCenter.<br /> ========================================================================== </p> http://www.datastax.com/support-forums/topic/problem-occuring-during-evaluating-datastax-opscenter#post-839 Tue, 13 Dec 2011 18:38:01 +0000 nickmbailey 839@http://www.datastax.com/support-forums/ <p>Are you running on a RHEL 5.x system? There is a known bug with correctly setting the python path on RHEL 5.x systems. An upcoming release fixes the problem, however in the meantime you can add the following line to '/etc/default/opscenterd'.</p> <p>export PYTHONPATH='/usr/share/opscenter/lib/py-redhat/2.6/5/amd64/'</p> <p>If your machine is 32 bit rather than 64 bit you should replace 'amd64' with 'i386' in the line above. Let me know if that doesn't resolve the issue. </p> http://www.datastax.com/support-forums/topic/problem-occuring-during-evaluating-datastax-opscenter#post-838 Tue, 13 Dec 2011 13:49:54 +0000 Anonymous 838@http://www.datastax.com/support-forums/ <p>While evaluating datastax we go step by step as given in website and even cassandra got running successfully but while starting opsCenter.</p> <p>following error occurred please help me out so that we can evaluate it and move forward to next step.</p> <p>========================================================================================<br /> service opscenterd restart [FAILED]<br /> Restarting Cassandra cluster manager opscenterd<br /> Stopping opscenterd [FAILED]<br /> Starting opscenterdTraceback (most recent call last):<br /> File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/application/app.py", line 631, in run<br /> runApp(config)<br /> File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/scripts/twistd.py", line 23, in runApp<br /> _SomeApplicationRunner(config).run()<br /> File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/application/app.py", line 374, in run<br /> self.application = self.createOrGetApplication()<br /> File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/application/app.py", line 439, in createOrGetApplication<br /> application = getApplication(self.config, passphrase)<br /> --- &lt;exception caught here&gt; ---<br /> File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/application/app.py", line 450, in getApplication<br /> application = service.loadApplication(filename, style, passphrase)<br /> File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/application/service.py", line 400, in loadApplication<br /> application = sob.loadValueFromFile(filename, 'application', passphrase)<br /> File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/persisted/sob.py", line 210, in loadValueFromFile<br /> exec fileObj in d, d<br /> File "/usr/share/opscenter/bin/start_opscenter.py", line 1, in &lt;module&gt;<br /> from opscenterd import opscenterd_tap<br /> File "/usr/lib/python2.6/site-packages/opscenterd/opscenterd_tap.py", line 16, in &lt;module&gt;</p> <p> File "/usr/lib/python2.6/site-packages/opscenterd/Config.py", line 392, in init_config</p> <p> File "/usr/lib/python2.6/site-packages/opscenterd/events/plugins/CassandraStore.py", line 12, in &lt;module&gt;</p> <p> File "/usr/lib/python2.6/site-packages/opscenterd/CassandraService.py", line 17, in &lt;module&gt;</p> <p> File "/usr/lib/python2.6/site-packages/opscenterd/Cluster.py", line 14, in &lt;module&gt;</p> <p> File "/usr/lib/python2.6/site-packages/opscenterd/AgentServer.py", line 23, in &lt;module&gt;</p> <p> File "/usr/lib/python2.6/site-packages/opscenterd/HttpUtils.py", line 10, in &lt;module&gt;</p> <p>exceptions.ImportError: No module named OpenSSL</p> <p>Failed to load application: No module named OpenSSL<br /> [FAILED]<br /> ======================================================================================= </p>