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ORA-12537 / ORA-12547 or TNS-12518 if Listener (including SCAN Listener) and Database are Owned by Different OS User (Doc ID 1069517.1)

Last updated on DECEMBER 24, 2023

Applies to:

Oracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.


In environment where listener home (including SCAN listener which resides in GRID Infrastructure/ASM home) and database home are owned by different OS user, ORA-12537 could happen when connecting through listener, when creating database through DBCA, or when installing database software and creating a database in runInstaller. Job Role Separation is a typical example as SCAN and local grid home listener is owned differently than database.

12537, 00000, "TNS:connection closed"
// *Cause: "End of file" condition has been reached; partner has disconnected.
// *Action: None needed; this is an information message.

Before the error is reported, connection could hang for a while, and a core file may also be generated.
SQL> conn system/xxx@<HOSTNAME>
ORA-12537: TNS:connection closed


PRCR-1079 : Failed to start resource ora.<DB_NAME>.db
CRS-5011: Check of resource <DB_NAME> failed: details at ..
CRS-2674: Start of ora.<DB_NAME>.db on <HOSTNAME> failed
ORA-12546: TNS:permission denied
TNS-12518: TNS:listener could not hand off client connection
TNS-12546: TNS:permission denied
 TNS-12560: TNS:protocol adapter error
  TNS-00516: Permission denied
   Linux Error: 13: Permission denied


TNS-12518: TNS:listener could not hand off client connection
TNS-12547: TNS:lost contact
 TNS-12560: TNS:protocol adapter error
  TNS-00517: Lost contact
   Linux Error: 32: Broken pipe
INFO: Starting Output Reader Threads for process <GI_HOME>/bin/kfod
INFO: Parsing KFOD-00300: OCI error [-1] [OCI error] [ORA-12547: TNS:lost contact
INFO: Parsing ] [12547]
INFO: Parsing
INFO: The process <GI_HOME>/bin/kfod exited with code 1
SEVERE: [FATAL] [INS-30502] No ASM disk group found.
   CAUSE: There were no disk groups managed by the ASM instance +ASM1.




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