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Users Unable to Log In to Heavily Loaded SGD Server, Error: "Fault String : (502)Bad Gateway" (Doc ID 2527639.1)

Last updated on JULY 08, 2019

Applies to:

Oracle Secure Global Desktop - Version 5.4 and later
Information in this document applies to any platform.

Symptoms

The Administrator of a Secure Global Desktop (SGD) deployment running SGD 5.4 and the January 2019 maintenance patches receives reports that users are unable to authenticate with the SGD environment during peak usage time, with the following error message:

"BAD GATEWAY The proxy server received an invalid response from an upstream server"

After receiving this report, the SGD Administrator found records of this response written to the Webservices logs (catalina.out) at the time of the outage:

WARNING: ID: 111011, Fault string : (502)Bad Gateway
Apr 05, 2019 10:01:11 AM org.apache.catalina.core.StandardWrapperValve invoke
INFO: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; The markup in the document preceding the root element must be well-formed.
at org.apache.xerces.framework.XMLParser.reportError(XMLParser.java:1150)
(...)
at java.lang.Thread.run(Thread.java:748)
parse: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; The markup in the document preceding the root element must be well-formed.


Under pressure, the SGD Administrator restarted SGD services on this node.  This action resolved the report temporarily, but the behavior returned as the server returned to peak usage the following week. 

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
 Tuning Apache
 Tuning Secure Global Desktop
 Managing High Production Loads with a SGD Array
 Requesting Assistance for Deployment Tuning
References


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