/etc/init.d/clvmd doesnt wait for complete finish, which in turn will give a problem if the machine tries to leave the cluster.

Reproduce: Use a very fast clustered machine with LVM and GFS on a SAN, and reboot it or shut it down. cman wont be able to leave the cluster. i adjusted cman to produce extra debug output which shows this:

Dec 11 19:27:40 localhost cman: Stopping cman:
Dec 11 19:27:40 localhost cman: DEBUG, SERVICES BEFORE LEAVE:
Dec 11 19:27:40 localhost cman: Service          Name                              GID LID State     Code
Dec 11 19:27:40 localhost cman: DLM Lock Space:  "clvmd"                             3   3 run       S-15,200,2
Dec 11 19:27:40 localhost cman: [2 1]
Dec 11 19:27:40 localhost cman:
Dec 11 19:27:40 localhost cman: DEBUG LEAVE OUTPUT:
Dec 11 19:27:40 localhost cman: cman_tool: Can't leave cluster while there are 2 active subsystems
Dec 11 19:27:44 localhost rc: Stopping cman:  failed

The cman_tool services output shows clvmd is still running, while /etc/init.d/clvmd already has been stopped.

Furter investigation points out that /etc/init.d/clvmd doenst wait for a complete finish of clvmd, hence producing a race condition which result to a stop error with cman.

This simple patch to clvmd solves it:

--- clvmd.orig  2008-12-11 20:10:09.000000000 +0100
+++ clvmd       2008-12-11 19:36:43.000000000 +0100
@@ -114,6 +114,7 @@
        stop
        rtrn=$?
        [ $rtrn = 0 ] && rm -f $LOCK_FILE
+       wait_for_finish
        ;;

   restart)



Edwin Eefting (DatuX)
Fabian Schneider (NSI-BV)