SC Request to Reset Host due to Watchdog

Asset ID:	1-72-1492344.1
Update Date:	2012-10-04
Keywords:

Solution Type Problem Resolution Sure

Solution 1492344.1 : SC Request to Reset Host due to Watchdog

Related Items


Sun Fire V240 Server
 Sun Fire V210 Server
 Sun Fire T1000 Server
 Sun Blade T6300 Server Module
 Sun Fire V440 Server
 Sun Fire V245 Server
 Sun Fire T2000 Server
 Sun Fire V215 Server
 Sun SPARC Enterprise T1000 Server
 Sun Netra CP3060 ATCA Blade Server
 Sun Netra T2000 Server
 Sun Fire V445 Server
 Sun SPARC Enterprise T2000 Server

Related Categories


PLA-Support>Sun Systems>SPARC>CMT>SN-SPARC: Tx000

"SC Request to Reset Host due to Watchdog" Is not a hardware fail but an indication of a Solaris Hang

In this Document

Symptoms

Cause

Solution

Created from <SR 3-6191697797>

Applies to:

Sun Fire V445 Server - Version All Versions to All Versions [Release All Releases]
Sun Fire V240 Server - Version All Versions to All Versions [Release All Releases]
Sun Fire T2000 Server - Version All Versions to All Versions [Release All Releases]
Sun Netra T2000 Server - Version All Versions to All Versions [Release All Releases]
Sun SPARC Enterprise T2000 Server - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.
This document applies to all systems using ALOM, including V210, V215, V240, V245, V440, V445, T1000, T2000, CP3060, & T6300

Symptoms

System is restarting with the message "SC Request to Reset Host due to Watchdog"

Cause

Solaris is hanging causing the watchdog to reset the system. This is NOT an indication of a hardware failure.

The SC watchdog watches Solaris, not the hardware. When Solaris does not respond to the SC after a certain amount of time, the watchdog is triggered. Depending on the settings the SC can reset, dump a core T1 based systems only) , or do nothing.

Solution

Have customer change the ALOM setting sys_autorestart to none or dumpcore (for T1 based systems). Ex: setsc sys_autorestart dumpcore.

If option 'none' is used you will need to manually force a dump when Solaris hangs again.

1. Use #. to get to ALOM if you are not already there

2. Type 'break', then 'console -f to get to the ok prompt.'

3. At the ok prompt type 'sync'

If option 'dumpcore' is used the corefile should already be produced.

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