My client is authenticated and does not need a password .... Intermittently, it asks for password to authenticate the client when it normally does not.

Can you tell whether the password it is asking for is the authentication key password, or a conventional login password? I assume from your description that you are using keys authorization for your automatic logins. What does the password request look like? 

Enter passphrase for key '/home/mkhan/.ssh/id_rsa':
or
Enter password for user mkhan

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In reply to Re: Server prompts for password even though client is authenticated when Parallel::ForkManager is used by zentara
in thread Server prompts for password even though client is authenticated when Parallel::ForkManager is used by mkhan

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