+++ This bug was initially created as a clone of Bug #1306877 +++
+++ Use this bug to provide a fix in the master branch. +++
If you change the log level
gluster volume set myvol diagnostics.brick-log-level DEBUG
then reset the log level
gluster volume reset myvol diagnostics.brick-log-level
the process will continue to log at the DEBUG level instead of returning to INFO despite resetting the value in glusterd's view of the graph - removing it from gluster volume info.
This is fixed in latest releases (3.7 & 3.8) of GlusterFS with http://review.gluster.org/#/c/11887 been the mainline patch.