Restoring a controller from a backup..........................................................................................138
Distributed (team) backing up and restoring ....................................................................................140
Backing up and restoring the Keystone configuration and database...............................................140
10 Metrics...........................................................................................................141
Viewing metric data..........................................................................................................................141
About metrics...............................................................................................................................141
How metric values are processed..........................................................................................141
Metric identifiers.....................................................................................................................142
Viewing the application IDs for applications that have persisted metrics to disk.........................143
Viewing the metrics persisted by a specific application...............................................................143
Metrics returned by the metrics/apps/app_id command......................................................144
Viewing the primary tags for metrics persisted by an application................................................145
Viewing the secondary tags for metrics persisted by an application...........................................145
Viewing the names of metrics persisted by an application..........................................................146
Viewing information about a persisted metric identified by its UID..............................................147
Viewing the time-series values for a persisted metric identified by its UID.................................147
Viewing all controller JVM metrics....................................................................................................149
Viewing current metric data using a JMX client................................................................................149
Metrics that are viewable using a JMX client..............................................................................149
Prerequisites................................................................................................................................149
Connecting to the JMX server using the JConsole JMX client....................................................150
Selecting and viewing metrics using JConsole JMX...................................................................151
Generating a controller support report..............................................................................................152
11 Troubleshooting.............................................................................................155
REST API request returns HTTP code 401......................................................................................155
Controller not listening on port TCP/8443.........................................................................................155
Packets not received at the end point...............................................................................................156
Session expired message in the UI..................................................................................................156
Error running the config_sdn.py script with date/time/NTP option....................................................156
Licensing...........................................................................................................................................157
Redeem quantity error.................................................................................................................157
Install ID format errors ................................................................................................................157
Install ID errors ...........................................................................................................................157
Applications that use the Cassandra database are experiencing failures........................................158
Controller support log fills disk space, contains multiple “Too many open files” messages.............158
Application management errors........................................................................................................159
Application not starting and in disabled state..............................................................................159
Application in transitive state.......................................................................................................159
Application management exceptions................................................................................................159
Getting IllegalStateException: HTTP code 500...........................................................................159
Getting UnsafeConfigurationException, HTTP code: 403...........................................................160
Getting ApplicationDisableException, HTTP code: 500..............................................................160
Getting ApplicationEnableException, HTTP code: 500...............................................................160
Getting ApplicationInstallException, HTTP code: 500.................................................................161
Getting ApplicationUpgradeException, HTTP code: 500............................................................161
Getting ApplicationUninstallException, HTTP code: 500............................................................161
Getting ApplicationUploadException, HTTP code: 500...............................................................161
Getting ApplicationValidationException, HTTP code: 400...........................................................161
OpenFlow errors...............................................................................................................................162
Host location not learned by controller........................................................................................162
Switches constantly being disconnected and reconnected ........................................................162
Unexpected network or service problems in hybrid mode...........................................................162
Troubleshooting teamed environments............................................................................................163
Controllers dropped from team or unable to form team..............................................................163
Contents 7
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