System becomes unresponsive with message "INFO: task <process>:<pid> blocked for more than 120 seconds".

Solution Verified - Updated -

Issue

  • /var/log/messages had a series of following messages before the system became unresponsive:

    INFO: task <process>:<pid> blocked for more than 120 seconds
    
  • What is the reason behind above messages and what kind of information is needed to troubleshoot them?

Environment

  • Red Hat Enterprise Linux (RHEL) 8
  • Red Hat Enterprise Linux (RHEL) 7
  • Red Hat Enterprise Linux (RHEL) 6
  • Red Hat Enterprise Linux (RHEL) 5.5 (kernel-2.6.18-194) or above
  • Processes in uninterruptible sleep (D state)

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