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Solaris Cluster Zone Cluster Oracle UNIX Distributed Lock Manager (UDLM/DLM) Failed to Start Due to Lack of Shared Memory with "Prog <ucmm_reconf> step <cmmstart>: timed out" (Doc ID 1939670.1)

Last updated on MAY 10, 2024

Applies to:

Solaris Cluster - Version 3.2 U2 to 4.3 [Release 3.2 to 4.3]
Oracle Solaris on x86-64 (64-bit)
Oracle Solaris on SPARC (64-bit)


This issue was observed in a Solaris Cluster Zone Cluster which was configured to host an Oracle RAC database. The DLM (Distributed Lock Manager) failed to start and results in a timeout of the ucmm in step cmmstart. This leads to call the abort step and terminates the ucmmd daemon.

Symptoms visible in various log files:

The /var/adm/messages of the global zone:



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