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Repeated IPC Send timeout detected Messages With Receiver Process PPA7 (Doc ID 2219281.1)

Last updated on NOVEMBER 29, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

Repeated PPA7 process related messages in RDBMS instance alert log file in Real Application Cluster environment. 

  
Fri Dec 30 13:36:50 2016
IPC Send timeout detected. Receiver ospid 90800 [oracle@<HOSTNAME1> (PPA7)]
Fri Dec 30 13:36:50 2016
Errors in file <ORACLE_BASE>/diag/rdbms/<DB_NAME>/<SID1>/trace/<SID1>_ppa7_90800.trc:
Fri Dec 30 13:42:21 2016
IPC Send timeout detected. Receiver ospid 90800 [oracle@<HOSTNAME1> (PPA7)]
Fri Dec 30 13:42:21 2016
Errors in file <ORACLE_BASE>/diag/rdbms/<DB_NAME>/<SID1>/trace/<SID1>_ppa7_90800.trc:
Fri Dec 30 13:47:38 2016
IPC Send timeout detected. Receiver ospid 90800 [oracle@<HOSTNAME1> (PPA7)]
Fri Dec 30 13:47:38 2016
Errors in file <ORACLE_BASE>/diag/rdbms/<DB_NAME>/<SID1>/trace/<SID1>_ppa7_90800.trc:
 

 Remote node Instance alert log have following message during the same time frame.

Fri Dec 30 13:36:49 2016
IPC Send timeout detected. Sender: ospid 1168 [oracle@<HOSTNAME2>]
Receiver: inst 1 binc 16 ospid 90800
Fri Dec 30 13:42:20 2016
IPC Send timeout detected. Sender: ospid 10305 [oracle@<HOSTNAME2>]
Receiver: inst 1 binc 16 ospid 90800
Fri Dec 30 13:47:38 2016
IPC Send timeout detected. Sender: ospid 10305 [oracle@<HOSTNAME2>]
Receiver: inst 1 binc 16 ospid 90800

ppa7 trace (<ORACLE_BASE>/diag/rdbms/<DB_NAME>/<SID1>/trace/<SID1>_ppa7_90800.trc) have following stack:

kxfpqidqr -> kxfpProcessMsg -> kxfpProcessJoin -> kxfpRecvJoin -> kxfpqidqr

 

Cause

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In this Document
Symptoms
Cause
Solution
References


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