/dev/watchdog': Device or resource busy

This document (7023607) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Workstation Extension 12
SUSE Linux Enterprise Server for SAP Applications Service Pack 3

Situation

starting corosync service:

error: watchdog_init_fd: Cannot open watchdog device '/dev/watchdog': Device or resource busy (16)”

Resolution

remove the IPMI kernel modules:

modprobe -r IPMI

modprobe -r ipmi_devintf

modprobe -r ipmi_msghandler

You also need to remove or remark the first 2 lines in # /etc/systemd/system.conf if they exist.

[Manager]

#RuntimeWatchdogSec=10

#ShutdownWatchdogSec=60

DefaultTasksMax=4096

Cause

IPMI Watchdog: driver initialized in messages file grabbing a hold of /dev/watchdog, this required removing ipmi modules.

After removing IPMI modules the /dev/watchdog was Indicating that watchdog was still in use.

An lsof /dev/watchdog indicated that systemd was now accessing /dev/watchdog.

This required commenting out the watchdog options from /etc/systemd/system.conf.

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

Document ID:7023607
Creation Date: 26-Dec-2018
Modified Date:03-Mar-2020
- SUSE Linux Enterprise High Availability Extension
- SUSE Linux Enterprise Server for SAP Applications

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