Many Connections From oraagent.bin to ASM or Database Instance (Likely ORA-00020)
(Doc ID 1287496.1)
Last updated on MAY 29, 2021
Applies to:Oracle Database - Enterprise Edition - Version 188.8.131.52 to 184.108.40.206 [Release 11.2]
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
Information in this document applies to any platform.
11gR2 Grid Infrastructure, observed many connections from oraagent.bin to ASM or database instance, v$session.program shows many "oraagent.bin@racnode1.<domain> (TNS V1-V3)" sessions, and "ps -ef| grep beq" shows many processes:
Once it happens, other instance may fail to restart as no new connection can be made to the ORA-00020 instance:
ORA-03113: end-of-file on communication channel
Errors in file $TRACE/+ASM12_lck0_9071.trc (incident=233838):
ORA-00600: internal error code, arguments: , , , , , , , , , , , 
Incident details in: $INCIDENT/+ASM12_lck0_9071_i233838.trc
LCK0 (ospid: 9071): terminating the instance due to error 480
Trace shows call stack of: .. kgeasi ksbmsg ksbedcic_one_int ksbedcic_one kclabs ..
The ORA-00600  error will go away once the ORA-00020 instance is restarted (it could mean a restart of Grid Infrastructure if OCR/VD is on ASM and ASM is getting ORA-00020)
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