Problem occuring during Evaluating DataStax OpsCenter

(4 posts) (2 voices)

• Started 1 year ago by
• Latest reply from nickmbailey
• This topic is not resolved

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1. 

   Anonymous
   Unregistered

   While evaluating datastax we go step by step as given in website and even cassandra got running successfully but while starting opsCenter.

   following error occurred please help me out so that we can evaluate it and move forward to next step.

   ========================================================================================
   service opscenterd restart [FAILED]
   Restarting Cassandra cluster manager opscenterd
   Stopping opscenterd [FAILED]
   Starting opscenterdTraceback (most recent call last):
   File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/application/app.py", line 631, in run
   runApp(config)
   File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/scripts/twistd.py", line 23, in runApp
   _SomeApplicationRunner(config).run()
   File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/application/app.py", line 374, in run
   self.application = self.createOrGetApplication()
   File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/application/app.py", line 439, in createOrGetApplication
   application = getApplication(self.config, passphrase)
   --- <exception caught here> ---
   File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/application/app.py", line 450, in getApplication
   application = service.loadApplication(filename, style, passphrase)
   File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/application/service.py", line 400, in loadApplication
   application = sob.loadValueFromFile(filename, 'application', passphrase)
   File "/usr/share/opscenter/lib/py-redhat/2.6/shared/amd64/twisted/persisted/sob.py", line 210, in loadValueFromFile
   exec fileObj in d, d
   File "/usr/share/opscenter/bin/start_opscenter.py", line 1, in <module>
   from opscenterd import opscenterd_tap
   File "/usr/lib/python2.6/site-packages/opscenterd/opscenterd_tap.py", line 16, in <module>

   File "/usr/lib/python2.6/site-packages/opscenterd/Config.py", line 392, in init_config

   File "/usr/lib/python2.6/site-packages/opscenterd/events/plugins/CassandraStore.py", line 12, in <module>

   File "/usr/lib/python2.6/site-packages/opscenterd/CassandraService.py", line 17, in <module>

   File "/usr/lib/python2.6/site-packages/opscenterd/Cluster.py", line 14, in <module>

   File "/usr/lib/python2.6/site-packages/opscenterd/AgentServer.py", line 23, in <module>

   File "/usr/lib/python2.6/site-packages/opscenterd/HttpUtils.py", line 10, in <module>

   exceptions.ImportError: No module named OpenSSL

   Failed to load application: No module named OpenSSL
   [FAILED]
   =======================================================================================

   Posted 1 year ago #
2. 

   nickmbailey
   Key Master

   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'.

   export PYTHONPATH='/usr/share/opscenter/lib/py-redhat/2.6/5/amd64/'

   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.

   Posted 1 year ago #
3. 

   Anonymous
   Unregistered

   Hello Mr. Nick,

   opsCenter has started successfully after making above changes that you have posted but still it is not able to connect to cassandra please suggest.

   Following error occurred in browser window

   ====================================================================================
   Error Loading OpsCenter x

   OpsCenter has not established a connection to your Cassandra cluster.

   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.
   ==========================================================================

   Posted 1 year ago #
4. 

   nickmbailey
   Key Master

   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.

   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.

   Posted 1 year ago #

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