How to handle "System hangs" on an x64 Solaris Installation

Asset ID:	1-71-1008401.1
Update Date:	2012-07-30
Keywords:

Solution Type Technical Instruction Sure

Solution 1008401.1 : How to handle "System hangs" on an x64 Solaris Installation

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PLA-Support>Sun Systems>x64>Server>SN-x64: MISC-SERVER

PreviouslyPublishedAs
211485

Applies to:

Sun Java Workstation W2100z - Version Not Applicable to Not Applicable [Release N/A]
Sun Ultra 20 M2 Workstation - Version Not Applicable to Not Applicable [Release N/A]
Sun Ultra 20 Workstation - Version Not Applicable to Not Applicable [Release N/A]
Sun Fire X4600 M2 Server - Version Not Applicable to Not Applicable [Release N/A]
Sun Ultra 40 M2 Workstation - Version Not Applicable to Not Applicable [Release N/A]
All Platforms

Goal

Description:

This document addresses handling and recovering from "System hangs" on x86 systems running Solaris.

To discuss this information further with Oracle experts and industry peers, we encourage you to review, join or start a discussion in the My Oracle Support Community - Sun x86 Systems

Symptoms:

System hang
System is not pingable
Can not log in
Can not execute commands
Can not mount shares
Can not start/stop services
System not responding
System is not usable

Conditions that can cause hangs:

Deadlock (A deadlock is a situation wherein two or more competing actions are waiting for the other to finish, and thus neither ever does.)
Resource exhaustion
Hardware failures

Fix

Steps to Follow:

Handling "System hangs" on an x86 Solaris Installation

The purpose of this document is to firstly check what you think is a hang actually is a hang. And if it is, how to proceed...

Verify that your system is actually hanging:

A hanging system will not respond on any command. It is no longer usable. Refer to:

<Document: 1012991.1> "How to check if your x86 platform "system hang" actually is a system hang".

How to reset your server in the event of a hang:

If you have qualified that the system is in a "hung situation" you have to reboot the system with a force option or by switching off the power. The shutdown will not be graceful. Refer to:

<Document: 1008398.1> "How to reset a x86 Platform" for more information.

Collecting data for further analysis of the hang:

A core dump is needed for further analyze of the hang situation. Refer to:

<Document: 1003085.1> "Solaris Operating System: Forcing a kernel core dump on an x86 system".

You should setup the system with kadb and open service request for next time the issue occurs.

Oracle support serviced need at least a valid core dump and explorer of the system to analyze the "hung situation". Refer to:

<Document: 1312847.1> "Oracle Explorer and Product Information Center.

At this point, if you have validated that each troubleshooting step above is true for your environment, and the issue still exists, further troubleshooting is required. For additional support contact Oracle Support Services.

Previously Published As 91510

References

<NOTE:1003085.1> - Solaris[TM] Operating System: How to force a kernel core dump on an x86 or x64 system
<NOTE:1008398.1> - How to Reset an X64 platform
<NOTE:1012991.1> - How to check if your x64 platform "system hang" actually is a system hang

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