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Action
See the
HPE VAN SDN Controller Administrator Guide
for instructions on how to enter your
Install ID
.
Applications that use the Cassandra database are experiencing failures
Symptom
Applications that use the Cassandra database are experiencing failures, and there are log entries
that indicate problems connecting to the Cassandra database.
Action
1.
Log in as the sdnadmin user to Linux on the server on which the controller is installed.
2.
Ensure that the Cassandra database is online by entering the following command:
~$
/opt/sdn/cassandra/bin/nodetool status
If you see the following message, the Cassandra database is not online:
Failed to connect to '127.0.0.1:7199': Connection refused
3.
If the Cassandra database is not online, you must restart the controller to restart the
Cassandra instance on that controller:
a.
Close any browser window in which the controller might be running.
b.
Restart the controller by entering the following command:
~$
sudo service sdnc restart
4.
If the Cassandra database stops repeatedly, determine why by doing the following:
a.
Export the logs files.
b.
In the
sdn-all-logs.zip
file, check the
/var/log/sdn/cassandra/system.log
file for possible errors.
Controller support log fills disk space, contains multiple “Too many open
files” messages
Symptom
The controller support log exceeds its configured maximum size and potentially consumes all
available disk space on the system on which the controller is installed. The log contains multiple
instances of the following message:
Unable to accept incoming connection: java.io.IOException: Too many
open files
Cause
The system on which the controller is installed has run out of file descriptors, either because it
controls too many devices, links, and hosts, or some other process on the system has consumed
a large number of file descriptors.
Action
1.
Ensure that the system on which the controller is installed conforms to the recommended
hardware requirements for the number of devices, links, and hosts. For hardware
recommendations, see the
HPE VAN SDN Controller and Applications Support Matrix
.
158
Troubleshooting