What does virtual host / webgroup not found mean?

No virtual host / webgroup found - Favicon.ico, on the following: Servlet request handler exception: No virtual host / webgroup found: The webgroup /favicon.ico was recently defined. Error SRVE0255E means that a particular web container could not find web workers (web module) or virtual host to process someone's request.

Is there a webgroup / virtual host to handle localhost 80?

SRVE0255E: The web / virtual host group for communicating with localhost: 80 is undefined. I have provided an application, created Pulgin, and distributed it as well. When I access the webserver, I get the above error.

You have a problem, except that the virtual host / webgroup cannot find the webgroup.

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In this guide, we will describe some possible causes that can cause an exception due to the virtual host / webgroup being unable to find the webgroup, and then I will provide some possible fixes that you can try to resolve this issue.

Troubleshooting

[“Product”: “Code”: “SSEQTP”, “Label”: “WebSphere Application Server”, “Business Unit”: “Code”: “BU053”, “Label”: “Cloud and Data Platform”, “Component “:” Servlet Engine / Web Container “,” 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; 8.5; 8.0; 7.0; 6.1; 6.0 “,” Revision “:” Independent Revision “,” Industry “:” code “:” LOB36 “,” label “:” IBM Automation “,” Product “:” code “:” SSNVBF “,” label “:” Runtime for Java Technology “,” Business Unit “:” code “:” BU053 “,” label “:” Cloud & Data Platform “,” Component ” : “Java SDK”, “Platform”: [“code”: “”, “label”: “”], “Version”: “”, “Edition”: “”, “Industry”: “code”: “LOB36 “,” label “:” IBM automation “]

Problem

exception virtual host/webgroup not found the web group

Get the following error: []PLGN0021E: Servlet Processor Request Exception: No virtual host / web group found: host clause localhost was not specified.PLGN0021E: Servlet Request Handler Exception: No virtual host / web group found: host-default-web-companies / web-application / samples not definedelena. []Where:

] localhost is the actual alias (or hostname) contained in the URL.[
] default_host is the name of the electronic host type that specifies the alias (or hostname) of the request.[
] / webapp / examples is any root directory of the request context.

]Get Tracking Error:[] PLGN0021E: Virtual Servlet Request Handler Exception: Host / Web Group Not Found: Host 123.55.67.89 With Port 4567 Was Not Detected Recently []Where:

] 123.55.67.89 is the alias contained in the URL.[
], where 4567 is the port the Internet is listening on.

]

Reason

This specific wording of the third error (if this target includes a port number) was only discovered under a few circumstances that are clearly stated in the Resolution section below.

This inconvenience is usually due to poor virtual host layout or an incomplete core component.

Resolve The Problem

This error has several possible causes and remedies for the best symptoms:

Virtual host or web application not found: host alias not defined:

This issue occurs because you have defined a wonderful alias for a virtual host (e.g. default_host) and that virtual host does not contain a module with networking, or because the virtual host has been activated and even the application server has not restarted … Requesting this deployment alias throws an “undefined host” error. To fix the problem, follow these steps:

Please remove the virtual host as it is not associated with web modules.
Bind a virtual host to the positioned web module.
Read the instructions in the WebSphere Application Server Information Center http://www.ibm.com/support/knowledgecenter/SSAW57_8.5.5/com.ibm.websphere.nd.doc/ae/trun_app_mapvhosts.html
Restart the application server. Type = “1”>

The web module

You have the same host alias specified on multiple critical hosts. Example:

spartan: 80 is duplicated in the same way as virtual hosts because the request instead of spartan: 80 identifies aliases in the two virtual deployments. ( *: 80 and Spartan: 80 ). To solve this problem, remove the current alias *: 80 in default_host and add specific aliases, for example: Wolverine: 80 Horse chestnut: 80 pounds www.wolverine.com:80 www.buckeye.com:80

Note:

The lifetime of the localhost alias may contribute to duplicate entries.

If localhost is used as an alias entry, check the

etc / hosts file to ensure that all hostnames (aliases) with a loopback address (127.0.0.1) are part of the host collection (for example, default_host ).

For example, if my welcome file has an entry that looks like this:

127.0.0.1 localhost Jones
Aliases must belong to the same virtual host group. Hence, you cannot put aliases, bindingsTogether with localhost and kolinski into different virtual collections.

The request was sent directly to the internal HTTP transport server of the application, and the URI entered is far from correct.

This message only appears because the URI you entered is not valid. If you do not want to see these voicemail messages, do one of the following:

Make sure the URI entered in your browser is often valid.
Send requests through the web server with the WebSphere plug-in installed. The plug-in only passes the correct URIs to the application server.
To fix this issue, make sure your web module is running or you have not explicitly specified the same alias on more than one virtual host. Otherwise, make sure the requested URI is valid for your application.

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The browser displays “ The page could not be displayed “. Servlet engine trace shows:

No virtual host / webgroup found: host 123.45.67.89 is not defined on connection 4567. Problem

This is widely known because the Plthora port in the plugin-cfg.xml file does not match most of the port numbers in virtualhosts.xml (V5.0, possibly V5.1), XML export (V4.0).

To resolve this issue, make sure that the port number has indeed been added through the administrative console.

If the important information in this document does not solve your problem, follow the instructions on your current link that matches your WebSphere product and open the PMR from IBM Support: