"Virtual Host/WebGroup not Found" Error When Submitting HTTP Request

Troubleshooting

Problem

Receiving the following errors:[

] PLGN0021E: Servlet Request Processor Exception: Virtual Host/WebGroup Not Found : The host localhost has not been defined. PLGN0021E: Servlet Request Processor Exception: Virtual Host/WebGroup Not Found: The web group default_host/webapp/examples has not been defined.[

] Where:[

] [
]localhost is the alias (or hostname) contained in the URL. [
]default_host is the name of the virtual host in which the alias (or hostname) of the request is listed. [
]/webapp/examples is the context root of the request. [

] Receiving the following error: [

]PLGN0021E: Servlet Request Processor Exception: Virtual Host/WebGroup Not Found : The host 123.55.67.89 on port 4567 has not been defined[

] Where:[

] [
]123.55.67.89 is the alias contained in the URL. [
]Where 4567 is the port the Web server is listening on. [

]

[{"Type":"MASTER","Line of Business":{"code":"LOB77","label":"Automation Platform"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"ARM Category":[{"code":"a8m3p000000F7xdAAC","label":"WebSphere Application Server traditional-All Platforms"}],"ARM Case Number":"","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF010","label":"HP-UX"},{"code":"PF016","label":"Linux"},{"code":"PF027","label":"Solaris"},{"code":"PF033","label":"Windows"}],"Version":"8.5.5;9.0.0;9.0.5"},{"Product":{"code":"SSNVBF","label":"Runtimes for Java Technology"},"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Component":"Java SDK","Platform":[{"code":"","label":""}],"Version":"","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}}]

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Document Information

More support for:
WebSphere Application Server

Component:
WebSphere Application Server traditional-All Platforms

Software version:
8.5.5, 9.0.0, 9.0.5

Operating system(s):
AIX, HP-UX, Linux, Solaris, Windows

Document number:
664047

Modified date:
03 March 2025

UID

swg21105548

IBM Support

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