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I am very new to Tomcat and web development in general and apologize for what may be a very silly question.
Consider 2 situations:
1.
I start Tomcat outside of Eclipse.
I use eclipse to create a war file.
I deploy it via admin console.
All is ok
2.
I start Tomcat via Eclipse
I can't access admin console
http://localhost:8080/manager/html greets me with 404 error
Same page is behaving properly when Tomcat is started outside of Eclipse
Please advise
Why might the issue be?
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Most of the time, this means that Tomcat is already running in the background and Eclipse is trying to open it again on the same ports. This is obviously not possible, as the ports will be in use. The issue typically arises from either the Eclipse or Tomcat process crash or being stuck.
This error indicates that the server could not find the desired resource. This resource can be any file such as JSP, HTML, or image resource. Usually, the resource is present, but it is referenced incorrectly. In most cases, you can fix this by correcting the URL.
Note: Download the latest version of eclipse IDE using this link and also configure the java environment. By default when Eclipse IDE is downloaded, it doesn't come with Tomcat installed with it.
For configuring the tomcat server in eclipse IDE, click on servers tab at the bottom side of the IDE -> right click on blank area -> New -> Servers -> choose tomcat then its version -> next -> click on Browse button -> select the apache tomcat root folder previous to bin -> next -> addAll -> Finish.
Why might the issue be?
You need to configure Eclipse to take control of your Tomcat installation. To do so:
This is illustrated on the screenshot below:
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