Oracle database on RHEL becomes inaccessible with errors 'TNS:lost contact Linux Error: 32: Broken pipe'

Solution Unverified - Updated -

Issue

Oracle database installed on RHEL becomes inaccessible and the Oracle log file captures following logs :

TNS-12547: TNS:lost contact
TNS-12560: TNS:protocol adapter error 
TNS-00517: Lost contact
Linux Error: 32: Broken pipe

Environment

- RHEL 5.7
- Oracle DB application installed on RHEL 

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