[13762235] Too Many Paths Cause Device Mapper to Hang

[All Linux Operating Systems] The device-mapper daemon occasionally hangs if operating system limits on the number of paths or devices, or other related limits, are exceeded.

A few paths appear to be missing in the host, and the multipathd show maps topology command hangs.

It may be necessary to restart the multipath daemon to correct the problem. Use the following command:

# service multipathd restart

Limits can be tuned by changing your operating system limits; follow instructions in your system operating administrator's guide.