update a comment, release a read-only mutex that wasn't being released in some circumstances
update a comment, release a read-only mutex that wasn't being released in some circumstances

raintank/metrictank,raintank/raintank-metric,OOM-Killer/metrictank,raintank/raintank-metric,raintank/metrictank,raintank/metrictank,replay/metrictank,replay/metrictank,replay/metrictank,raintank/raintank-metric,OOM-Killer/metrictank,replay/metrictank,raintank/metrictank,OOM-Killer/metrictank