Could you please check with TAC whether your CUCM version is also affected by the bug CSCsz99841 as I see "ccmservice" user in your logs too?
Cluster Manager will update ccmservice user SSH security keys whenever a new node is added or removed from the cluster
CDR Agent cannot send CDR files from sub to pub using sftp.
This is because SFTP is initiating a connection using the user 'ccmservice'
i) Stop CDR Agent service on Call Processing Node
ii) Gain root access via remote access support account. And then
Copy over the authorized keys in the specific user's SSH directory:
/home/sftpuser/.ssh/authorized_keys file to
Root CLI command:
cp /home/sftpuser/.ssh/authorized_keys /home/ccmservice/.ssh/authorized_keys
iii) Start CDR Agent service on Call Processing Node.
Further Problem Description:
This was caused by changes that were made to tighten up file permissions around the CUCM file structure
From logs seeing that sftp is initiating a connection with username "ccmservice". This is a known bug caused by incorrect permissions and you will need to open a TAC case as the authorized keys in the specific user's SSH directory need to be copied manually from root access.
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