LVM command hangs or takes a long time to complete in RHEL

Solution Verified - Updated 2016-02-23T12:54:06+00:00 -

Issue

LVM commands hang or take a long time to complete.
System boot hangs at an LVM command.
LVM commands get stuck when scanning a multipath map with all paths failed and queue_if_no_path or no_path_retry enabled.
LVM commands get stuck when scanning a device-mapper map that is in the suspended state.
LVM commands get stuck when scanning a device which is not responsive or functional.
Server is hanging after running commands pvs, vgs, lvs.

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