Installing maintenance with CA CSM and it hangs at 50% Applying maintenance to zone CAIT0 - Waiting for GIMSMP.
While CA CSM is applying maintenance it updates the ZFS filesystem for LWJK. This file system is mounted to the /.../mpm/ljroot/ mount point. Verify that the volser on which this file system was allocated has enough space and if it has enough space reorganize it with the ZFSREORG tool.
Please refer to http://www.redbooks.ibm.com/redpapers/pdfs/redp4769.pdf for more information on ZFSREORG.