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ASM (ORA-600[kffMapMesgAcquire02]) and Database (ORA-15064: communication failure with ASM instance) (Doc ID 1483294.1)

Last updated on JANUARY 30, 2022

Applies to:

Oracle Database - Enterprise Edition - Version 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.



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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