With 
$dsn = "dbi:Oracle:DS8CC2";

[download]
or 
$dsn = "dbi:Oracle:DS8CC2.ORACLEOUTSOURCING.COM";

[download]
the error becomes 
DBI connect('DS8CC2','',...) failed: ORA-01031: insufficient privilege
+s (DBD ERROR: OCISessionBegin)

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and 
DBI connect('DS8CC2.ORACLEOUTSOURCING.COM','',...) failed: ORA-01031: 
+insufficient privileges (DBD ERROR: OCISessionBegin)

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respectively.

But as I mentioned, there's no issue while connecting directly using sqlplus '/as sysdba' and $TNS_ADMIN/sqlnet.ora does have the entry: 

NAMES.DEFAULT_DOMAIN = ORACLEOUTSOURCING.COM

[download]

In reply to Re^2: Connecting 'as sysdba' using DBD::Oracle by laminee
in thread Connecting 'as sysdba' using DBD::Oracle by laminee

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