Unexpected restart when downgrading from SGOS 7.3 to 6.7

Products

• ProxySG Software - SGOS
• ISG Proxy
• Advanced Secure Gateway Software - ASG

Issue/Introduction

After downgrading the EdgeSWG (formerly ProxySG), unexpected restarts occur.

Environment

This error message is seen in the Mini-Context section of the Sysinfo log:

 

Hardware exception code: 0x0

Software exception code: 0x80005

Page fault linear address: 0x0

Process group: "PG_HTTP"

Cause

Objects stored in cache on SGOS 7.3 in a compression format that is not supported by SGOS 6.7.

Resolution

To workaround this issue, after downgrading from SGOS 7.3 to SGOS 6.7, clear the cache of objects with unsupported compression formats by applying the following commands:

SG> en
SG# clear-cache