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1911531 - ORA-12170 or TNS-12535 during connection to Oracle


  • During connection to Oracle, the following message appears in the workprocess trace:
C     OCIServerAttach(OCI_DEFAULT) failed with SQL error 12170:
C     ORA-12170: TNS:Connect timeout occurred
C  *** ERROR => CONNECT failed with sql error '12170'
 [dbsloci.c    15455]
  • Alert log shows error messages similar to the following:
Fatal NI connect error 12170.
TNS-12535: TNS:operation timed out
ns secondary err code: 12560
nt main err code: 505
TNS-00505: Operation timed out
nt secondary err code: 110
nt OS err code: 0


Fatal NI connect error 12537, connecting to:
TNS-12537: TNS:connection closed
    ns secondary err code: 12560
    nt main err code: 0
    nt secondary err code: 0
    nt OS err code: 0
opiodr aborting process unknown ospid (<pid>) as a result of ORA-609



  •  Oracle database
  •  SAP release independent
  •  Operating system independent


SAP NetWeaver all versions


ORA, 12170, TNS, 12535, 12537, 19c, 12c, 11g, 10.2 , KBA , BC-DB-ORA , Oracle , Problem

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