Microsoft KB Archive Search

Notice: This website is an unofficial Microsoft Knowledge Base (hereinafter KB) archive and is intended to provide a reliable access to deleted content from Microsoft KB. All KB articles are owned by Microsoft Corporation. Read full disclaimer for more details.

  1. Home
  2. FIX: "HTTP 503" errors on a server that is running Forefront Unified Access Gateway 2010 Service Pack 4

FIX: "HTTP 503" errors on a server that is running Forefront Unified Access Gateway 2010 Service Pack 4

View products that this article applies to.

Symptoms

You may see HTTP 503 errors returned from a server that is running Microsoft Forefront Unified Access Gateway 2010 Service Pack 4. This condition remains until the worker process is recycled or until Internet Information Services (IIS) is restarted. Additionally, HTTP 503 errors are logged in the HTTP.sys log file that has a status of "Queue Full."

↑ Back to the top

Cause

This problem is caused by a deadlock that stops requests from being processed. Eventually, requests back up in the request queue until it is full. At this point, the error occurs for all successive requests.

↑ Back to the top

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

↑ Back to the top

References

Learn about the terminology that Microsoft uses to describe software updates.

↑ Back to the top

Keywords: kbqfe, kbsurveynew, kbnotautohotfix, kbfix, kbexpertiseinter, kbbug, kb

↑ Back to the top

Article Info
Article ID : 3068283
Revision : 1
Created on : 1/7/2017
Published on : 6/19/2015
Exists online : False
Views : 266