clvmd process takes the 100% of a CPU and lvm commands are unresponsive in RHEL 5

Solution Unverified - Updated -

Issue

  • clvmd is using 100% CPU and lvm commands are not responsive
  • When issueing comands on lvm, like vgdisplay, lvdisplay, pvs, lvs... the command hangs and do not release the prompt and no output is displayed.
  • Every 30 minutes our monitoring agent start a "diskscan" operation which runs LVM commands: at the same time or immediately after, the clvmd process starts taking 100% CPU.

Environment

  • Red Hat Enterprise Linux (RHEL) 5 with the Resilient Storage Add On
  • lvm2-cluster prior to release 2.02.88-9.el5_10.1
    • clvmd running
    • One or more volume groups marked with the "clustered" attribute
    • locking_type="3" in /etc/lvm/lvm.conf
  • This has been most observed in environments running diskscan from IBM Tivoli. It is likely possible to trigger this through other means, but this is the most common trigger observed.

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Close

Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.