DUAS upgrade to 7.x errors "telemetry root tag missing" or node Connected with warning

Products

• CA Automic Dollar Universe

Issue/Introduction

After upgrade of Dollar Universe to 7.x we encounter an error showing "telemetry root tag missing" in universe.log continously.

Example of errors in a DUAS 7.01.01:

|ERROR|X|IO |pid=p.t| owls_io_telemetry_read    | ezxml_parse_file(/path_to_node/data/telemetry.xml) error [error near line 1]: root tag missing
|ERROR|X|IO |pid=p.t| owls_io_telemetry_get     | owls_io_telemetry_read(/path_to_node/data/telemetry.xml) error 750
|ERROR|X|IO |pid=p.t| get_telemetry             | owls_io_telemetry_get() error 750
|ERROR|X|IO |pid=p.t| uvms_sync_in_ioserver     | telemetry_callback(GET) error 750

Another symptom is the following:

Due to a power outage, the server where the node is installed was rebooted, and since then, the node is seen in UVMS Node List with Status "Connected with the warning".

The UVMS port was accessible using PowerShell's TNC command. The node's node settings were visible as were the engines. Jobs were running. However, communication with the UVMS was not functioning and objects requiring synchronization were not updating (ex: alerting rules were not updating).

Environment

Release : 7.x

Component: Dollar Universe Application Server

Cause

The issue seems to be related to the incorrect data in telemetry.xml or file corruption.

This corruption may occur due to be either of below reasons

1: DUAS is upgraded to 7.0 or higher prior to UVMS

2: File System where the data folder is stored gets full, leading to a telemetry.xml file corruption

Resolution

Workaround:

Please follow below steps to correct the content of telemetry.xml

1: Stop the Node services

2: Take backup of telemetry.xml file outside DUAS install directory

3: Remove the telemetry.xml file 

4: Start the Node service, the IO service should create a telemetry.xml file again on restart.

 

Solution:

Update to a fix version listed below or a newer version if available.

Fix version(s): 
Component: Application Server (Node)
Dollar Universe 7.01.01 - Available

Additional Information

Defect ID: DE123092

Public Description: Telemetry file could get corrupted on file system full. In such circumnstances, the file will be automatically reinitialized by the IO upon startup.

Please remember that the recommended sequence of upgrade is UVMS > UVC > DUAS.