Post-upgrade to 7.0 discovery_agent generates alarms indicating a failed upgrade

Document ID : KB000034257
Last Modified Date : 14/02/2018
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Even though all upgradeable discovery_agents were upgraded customer was getting alarms as if the discovery_server doesn't think the discovery_agent's were actually upgraded, and this occurred despite discovery_agent cold start/restart.

".../discovery_agent with incompatible version 6.50 : Please update to discovery_agent version 7.00 or later."

alarm example:

Oct 10 10:17:30:484 ERROR [nimclient, discovery_server] Exception in ThreadClient: (2) communication error, I/O error on nim session (S) com.nimsoft.nimbus.NimServerSession(/172.30.33.150:48032-/172.30.33.150:64891): Connection reset

and

Oct 10 10:17:30:484 ERROR [nimclient, discovery_server] (2) communication error, I/O error on nim session (S) com.nimsoft.nimbus.NimServerSession(/172.30.xx.xxx:xxxxx-/172.xx.x.xxx:xxxxx): Connection reset

Then we saw exception in thread client errors in the log as per above example.

Note that the new discovery_agent v7.0 is not supported on 32-bit OSs, you need a 64-bit OS.

Even after discovery_server cold start we received the same communication issues/connect reset/thread client errors.

Resolution:

1) Using the Infrastructure Manager (IM), Deactivate existing discovery_agent probe v7.0

2) Delete the discovery_agent v7.0 files/folder from the file system (note discovery Scopes were not deleted/affected)

3) Redeploy the discovery_agent probe v7.0

Then the alarms were eliminated and did not return.