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12c: DBM Schematic Shows Cell Node Status Down and Multiple Password Prompts When Starting Agent (Doc ID 1403954.1)

Last updated on MAY 24, 2012

Applies to:

Enterprise Manager for Oracle Database - Version 12.1.0.1.0 to 12.1.0.1.0 [Release 12.1]
Oracle Exadata Storage Server Software - Version 11.2.1.2.0 and later
Information in this document applies to any platform.

Symptoms

 

After stopping then restarting the EM agent on an X2 Exadata rack, the agent keeps prompting for nm2user and cellmonitor user passwords. 

The following errors appear in gcagent.log repeating over and over:

Permission denied (publickey,gssapi-with-mic,password).
em_error=Failed to execute ssh -i /u01/app/oracle/EM/core/12.1.0.1.0/.ssh/id_dsa -o
StrictHostKeyChecking=no -l cellmonitor 10.141.134.95 cellcli -e 'list ibport attributes hcaNodeGUID, hcaId, hcaType, hcaFWVersion, hcaHWVersion, portNumber, id':HCA_PortConfig:Permission denied, please try again.
Permission denied, please try again.
Permission denied (publickey,gssapi-with-mic,password).
em_error=Failed to execute ssh -i /u01/app/oracle/EM/core/12.1.0.1.0/.ssh/id_dsa -o
StrictHostKeyChecking=no -l cellmonitor 10.141.134.95 cellcli -e
'list ibport attributes hcaNodeGUID, hcaId, hcaType, hcaFWVersion, hcaHWVersion, portNumber, id':
@ yyyy-MM-dd HH:mm:ss,SSS]) (request id 1)<




Which points to an ssh permissions issue, but the oracle user is able to access the cell nodes fine with no password from both DB nodes:

[oracle@dmorlx8db01 log]$ ssh cellmonitor@dmorlx8cel10 cellcli -e list cell
dmorlx8cel10 online

[oracle@dmorlx8db02 .ssh]$ ssh cellmonitor@dmorlx8cel12 cellcli -e list cell
dmorlx8cel12 online
[oracle@dmorlx8db02 .ssh]$


Changes

The oracle user re-established SSH Equivalence between the DB node and storage cell nodes for the cellmonitor user (the Oracle Storage Cell server monitoring user)

Cause

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