Troubleshooting

View troubleshooting tips.
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Use the troubleshooting section to diagnose and resolve issues with
DX NetOps Virtual Network Assurance
.
Installation Stopped Abruptly
In
DX NetOps Virtual Network Assurance
3.6.6, when the installation stops abruptly for any reason, and you start the installation again, the installer does not prompt you to install the product on a custom directory. Perform the following steps to resolve the issue and install the product on a custom directory.
Follow these steps:
  1. On the server where the installation stopped, navigate to the
    /etc
    directory.
  2. Delete the VNA.cfg file using the
    rm -rf VNA.cfg
    command.
  3. Follow the steps in the Installing section and complete the installation.
Insufficient Permissions for Install
Symptom:
The following error message appears:
Error: Insufficient permissions for installation path: /u01/opt/CA Path must have executable permission for 'other'. Exiting the installer...
Solution:
Run the following command to ensure that all child and parent directories have the executable permission for 'other'.
chmod 755 "
Folder_Name
"
Java Process Suddenly Exits
Symptom:
  • The
    DX NetOps Virtual Network Assurance
    Java process suddenly exits.
  • Root cause unidentified in the VNA log files.
  • A file with name hs_err_pidXXXX.log (where XXXX is the VNA Java process PID) is created in the VNA root folder with following text as part of the content:
    # There is insufficient memory for the Java Runtime Environment to continue. # Native memory allocation (mmap) failed to map YYYY bytes for committing reserved memory.
Solution:
  • Increase physical memory or swap space. Check whether the swap backing store is full.
  • Decrease Java heap size (-Xmx/-Xms).
Configure
DX NetOps Virtual Network Assurance
Logging
By default, VNA logging is enabled and set to INFO on the Data Aggregator and Data Collector.
Follow these steps:
  1. Go to the following location:
    VNA_host
    :9990
  2. Enter the administrator credentials.
  3. Go to
    Configuration
    ,
    Subsystems
    ,
    Logging
    , and
    LOG CATEGORIES
    .
  4. Edit the logging configurations as desired.
Useful Log Categories
You might find the following log categories useful for diagnosing and resolving issues with
DX NetOps Virtual Network Assurance
:
  • INVENTORY_SERVICE
    Logs inventory updates that are sent from
    DX NetOps Virtual Network Assurance
    to
    DX NetOps Spectrum
    or
    DX NetOps Performance Management
    Recommended Log Level:
    TRACE
    Location:
    /opt/CA/VNA/wildfly/standalone/log/gateway.log
  • CLIENT_UPDATES
    Logs client updates that are sent from
    DX NetOps Virtual Network Assurance
    to
    DX NetOps Spectrum
    or
    DX NetOps Performance Management
    Recommended Log Level:
    TRACE
    Location:
    /opt/CA/VNA/wildfly/standalone/log/gateway.log
  • REST_API = TRACE
    Logs REST API calls made to
    DX NetOps Virtual Network Assurance
    and includes responses that are sent to the caller
    Recommended Log Level:
    TRACE
    Location:
    /opt/CA/VNA/wildfly/standalone/log/gateway.log
  • AGGREGATION_SERVICE
    Logs messages from the VNA Aggregator
    Recommended Log Level:
    DEBUG (for a summary of data coming from remote VNAs) or TRACE (for the entire response log coming from remote VNAs)
    Location:
    /opt/CA/VNA/wildfly/standalone/log/gateway.log
  • OC_ACQUISITION
    Logs the dump of raw data that is received from the target SDN devices
    Recommended Log Level:
    DEBUG
    Location:
    /opt/CA/VNA/collector/
    Engine_UUID
    /tmp/poll_*
  • SOUTHBOUND_UPDATES
    Logs the dump of polled data that is sent from the Open Collector to the Broker
    Recommended Log Level:
    TRACE
    Location:
    /opt/CA/VNA/debug
View
DX NetOps Virtual Network Assurance
Logging
VNA logs are available on the Data Aggregator and Data Collector in the following locations:
  • DA_Install_Directory/
    apache-karaf-
    version
    /data/log/sdn.log
  • DC_Install_Directory/
    apache-karaf-
    version
    /data/log/sdn.log