Users Receive Error "Exception: oracle.apps.fnd.common.AppsException: oracle.apps.fnd.common.PoolException: Exception creating new Poolable object" During Login To E-Business Suite

On : 12.1.1 version, Jserv, JDK, JVM, JRE

When attempting to login EBS, the following error occurs.

ERROR
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Unable to generate forwarding URL. Exception: oracle.apps.fnd.common.AppsException: oracle.apps.fnd.common.PoolException: Exception creating new Poolable object

STEPS
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The issue can be reproduced at will with the following steps:
1. Login EBS
2. Error occurs

Also, Following error message can be found in OACORE application log:

......

Workaround:
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Comments out the definition in /etc/resolve.conf

e.g.

Before:

After:

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This is a temporarily solution for this issue.

If customer wants to fix the issue permanently.

The solution is to get help from OS/Network DBA to setup DNS server correctly.