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TNS-12509: TNS:listener failed to redirect client to service
handler



TNS-12509: TNS:listener failed to redirect client to service handler..

Answer / guest

Cause: The dispatcher terminated unexpectedly

Action: Attempt to connect again and if the same error
occurs, contact the DBA to check the state of the
dispatchers for this SID. If the problem persists, turn on
tracing in the listener to determine the TNS error caused by
the redirect.

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