ASM (ORA-600[kffMapMesgAcquire02]) and Database (ORA-15064: communication failure with ASM instance)
(Doc ID 1483294.1)
Last updated on MAY 20, 2021
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 and later
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 Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
***Checked for relevance on 05-Feb-2015***
About the environment: 4 node RAC - 112030 (no Interim patches) - Solaris
While attempting to add a disk to an ASM disk group, +ASM2 instance gave the following errors and became unresponsive (all queries hung):
Curiously, +ASM4's lmd0, reported ORA-4031 (unable to allocate 3768 bytes of shared memory ("shared pool","unknown object","sga heap (1,0)","ges enqueues") just before +ASM2 departed the cluster.
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