NFS client hangs and "nfs4_handle_delegation_recall_error" found in dmesg.

Solution Verified - Updated -

Issue

  • NFS client hangs while returning delegations.
  • Below delegation recall errors may be reported in dmesg:
NFS: nfs4_handle_delegation_recall_error: unhandled error -512
NFS: nfs4_handle_delegation_recall_error: unhandled error -10024
  • We have a hanging process, it's using data ontop of a mounted NFS export. The fcntl() system call issued by a user process has not returned, The user process processing does not finish - usually it finishes within 2 minutes.

Environment

  • Red Hat Enterprise Linux (RHEL) 8, all minor releases
  • kernel:
    • rhel8.10: kernels before 4.18.0-553.37.1.el8_10 affected
  • NFSv4

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content