When reinstalling Data Collector reusing the DCM_ID from the previously installed Data Collector a bad value for the collector-manager-id value is written to the com.ca.im.dm.core.collector.cfg file.
The correct steps are followed to reinstall the Data Collector on the same host it was installed on previously.
After install the services fail to remain running. Examining the install it's found that the wrong value is set for the collector-manager-id in the com.ca.im.dm.core.collector.cfg file.
This value should show value of:
Instead it shows the following. Note the errant slash mark that doesn't belong after the host name but before the colon.
Reported against DX NetOps Performance Management release r20.2.7.
Unable to be reproduced on Broadcom Support and Engineering labs using both r20.2.7 and the latest current release at the time of testing, r20.2.9.
Root cause is unknown at this time. Issue was seen in customer environment but not reproducible in Broadcom Support or Engineering labs. Customer was unable to attempt further reproduction on existing systems post upgrade.
Removing the errant slash mark, saving the file changes and restarting the services resolves the issue.
If you see this issue, and are able to readily reproduce it allowing for additional debug logging, please open a new support case referencing this Knowledge Base Article for further assistance.