15.1 Migration or Online of Resources Causes Cluster Crash

If the split-lock detection is enabled by default on the cluster node when the resource is migrated or bought online, the cluster crashes.

By permanently disabling the split_lock_detect, this problem can be fixed:

  1. Log in to the node as the root user, then open a terminal console.

  2. Verify if split_lock_detect is enabled.

    cat /proc/cpuinfo | grep split_lock_detect

    The command will display split lock detection: enabled.

  3. Open the file /etc/default/grub.

  4. Locate "GRUB_CMDLINE_LINUX_DEFAULT=" and add "split_lock_detect=off" at the end of the line.

    "GRUB_CMDLINE_LINUX_DEFAULT=<…> split_lock_detect=off"

  5. Update the bootloader.

    update-bootloader -refresh

  6. Reboot the cluster node.

  7. Verify if split_lock_detect is disabled by running any one of the following commands:

    • journalctl -b |grep split

    • dmesg -T

    The command will display split lock detection: disabled.