System hangs while starting multipathd daemon during boot process.

Issue

• The system is getting hung while starting multipathd daemon during boot process and shows following error messages on console:

        qla2xxx [0000:41:00.0]-505f:7: Link is operational (8 Gbps).
        qla2xxx [0000:41:00.1]-505f:8: Link is operational (8 Gbps).
        sd 9:0:0:0: [sdaq] Assuming drive cache: write through
            Welcome to Red Hat Enterprise Linux Server
        Starting udev:                      [   OK   ]
        Setting hostname  host1.example.com:
        INFO: task multipathd:2540 blocked for more than 120 seconds.           <------
            Not tainted 2.6.32-431.17.1.el6.x86_64 #1
        "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
        [...]