Sun Cluster Data Service for Oracle RAC Guide for Solaris OS

ProcedureHow to Recover From a Failure of the UCMM or a Related Component

Perform this task to correct the problems that are described in the following sections:

This procedure provides the long forms of the Sun Cluster maintenance commands. Most commands also have short forms. Except for the forms of the command names, the commands are identical. For a list of the commands and their short forms, see Appendix A, Sun Cluster Object-Oriented Commands, in Sun Cluster Data Services Planning and Administration Guide for Solaris OS.

  1. To determine the cause of the problem, examine the log files for UCMM reconfigurations and the system messages file.

    For the location of the log files for UCMM reconfigurations, see Sources of Diagnostic Information.

    When you examine these files, start at the most recent message and work backward until you identify the cause of the problem.

    For more information about error messages that might indicate the cause of reconfiguration errors, see Sun Cluster Error Messages Guide for Solaris OS.

  2. Correct the problem that caused the component to return an error to the UCMM.

    For example:

    • If the license for VxVM is missing or has expired, ensure that VxVM is correctly installed and licensed.

      1. Verify that you have correctly installed your volume manager packages.

      2. If you are using VxVM, check that you have installed the software and check that the license for the VxVM cluster feature is valid.

      Note –

      A zone cluster does not support VxVM.

    • If the ORCLudlm package that contains the Oracle UDLM is not installed, ensure that the package is installed.

      Note –

      Oracle UDLM is required only when it is actually used.

      1. Ensure that you have completed all the procedures that precede installing and configuring the Oracle UDLM software.

        The procedures that you must complete are listed in Table 1–1.

      2. Ensure that the Oracle UDLM software is correctly installed and configured.

        For more information, see SPARC: Installing the Oracle UDLM.

    • If the version of the Oracle UDLM is incompatible with the version of Sun Cluster Support for Oracle RAC, install a compatible version of the package.

      For more information, see SPARC: Installing the Oracle UDLM.

    • If the amount of shared memory is insufficient to enable the Oracle UDLM to start, increase the amount of shared memory.

      For more information, see How to Configure Shared Memory for the Oracle RAC Software in the Global Cluster.

    • If a reconfiguration step has timed out, increase the value of the extension property that specifies the timeout for the step.

      For more information, see Node Panic Caused by a Timeout.

  3. If the solution to the problem requires a reboot, reboot the node where the problem occurred.

    The solution to only certain problems requires a reboot. For example, increasing the amount of shared memory requires a reboot. However, increasing the value of a step timeout does not require a reboot.

    For more information about how to reboot a node, see Shutting Down and Booting a Single Node in a Cluster in Sun Cluster System Administration Guide for Solaris OS.

  4. On the node where the problem occurred, bring online the RAC framework resource group.

    1. Become superuser or assume a role that provides solaris.cluster.admin RBAC authorization.

    2. Type the command to bring online and in a managed state the RAC framework resource group and its resources.

      # clresourcegroup online -emM -n node rac-fmwk-rg
      -n node

      Specifies the node name or node identifier (ID) of the node where the problem occurred.


      Specifies the name of the resource group that is to be moved to the MANAGED state and brought online.