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10.13. Debug Logging for Distributed Lock Manager (DLM) Needs to be Enabled
There are two debug options for the Distributed Lock Manager (DLM) that you can enable, if necessary: DLM kernel debugging, and POSIX lock debugging.
To enable DLM debugging, edit the
/etc/cluster/cluster.conf
file to add configuration options to the dlm
tag. The log_debug
option enables DLM kernel debugging messages, and the plock_debug
option enables POSIX lock debugging messages.
The following example section of a
/etc/cluster/cluster.conf
file shows the dlm
tag that enables both DLM debug options:
<cluster config_version="42" name="cluster1"> ... <dlm log_debug="1" plock_debug="1"/> ... </cluster>
After editing the
/etc/cluster/cluster.conf
file, run the cman_tool version -r
command to propagate the configuration to the rest of the cluster nodes.