Eclipse Build Path Nesting Errors

Question

I m working on a simple JSP Servlet Tomcat webapp for my class  The professor asked us to use a folder structure that is slightly different than the default dynamic web project structure  Rather than using the webcontent folder he wants all of our source code under src main java and src main webapp   When I run the app my welcome file displays fine  but when I try to access my servlets I get    Http 500 SEVERE  Allocate exception for servlet InitDb   java lang ClassNotFoundException  I m pretty sure it s a build path error  I have final src on the build path but I am receiving the warning     Cannot nest  final src main webapp WEB-INF classes  inside  final src   To enable the    nesting exclude  main   from  final src      I have this in my deployment assembly     lt wb-resource deploy-path     source-path   src main webapp  tag  defaultRootSource   gt     When I exclude main  the warning goes away  but it doesn t fix the problem  I would appreciate any advice  Thanks

User · Answer

Try this   From the libraries tab   Eclipse - gt  right click on project name in sidebar - gt  configure build path - gt  Libraries   Remove your web app libraries   click on  Web App Libraries  - gt  click  remove    Add them back in   click  Add Library  - gt  click to highlight  Web App Libraries  - gt  click  next  - gt  confirm your desired project is the selected option - gt  click  Finish    Highlighting  Web App Libraries

User · Answer

For Eclipse compiler to work properly you need to remove final src from the source path and add final src main java instead  This may also solve your problem as now the build directory won t be inside the Java source folder

User · Answer

I wanted to throw in a non-mavenish answer to this thread   Due to version control and strict directory structure reasons  I was unable to follow Acheron s answer  the best answer  of doing something similar to removing src  and adding src main java and src test java to the build path   I had actually been off-and-on battling this nested build path issue for a couple weeks   The answer to the problem is hinted in the error message   To enable the nesting exclude  main   from  final src   Fix  In your build path  you need to edit your Inclusion and Exclusion Patterns by clicking on Excluded   None  and then Edit       Go to the navigator and press right click on the project Build Path Configure Build Path Source  tab      There you can add main webapp WEB-INF classes as an Exclusion Pattern   Then it should allow you to add main webapp WEB-INF classes to the build path as a separate source folder

User · Answer

I had the same issue and correct answer above did not work for me  What I did to resolve it was to go to Build Path- gt Configure Build Path and under the source tab I removed all the sources  which only had one source  and reconfigured them from there  I ended up removing the project from eclipse and import the maven project again in order to clear up the error

User · Answer

In my case I have a gradle nature project in eclipse  the problem was in a build gradle  where this sourceSets is specified   sourceSets       main           java               srcDir  src                       This seems to works well with intelliJ however seems than eclipse doesn t like nest src  src java  src resources  In eclipse I must change it to   sourceSets       main           java               srcDir  src main java

User · Answer

The accepted solution didn t work for me but I did some digging on the project settings    The following solution fixed it for me at least IF you are using a Dynamic Web Project    Right click on the project then properties   or alt-enter on the project  Under Deployment Assembly remove  src     You should be able to add the src main java  It also automatically adds it to Deployment Assembly   Caveat  If you added a src test java note that it also adds it to Deployment Assembly  Generally  you don t need this  You may remove it

User · Answer

You have to separate your sources and your target directory where the build output goes  It s also important to note that no class files ever can end up in the source directory  This is not against your professor s advice - actually he s promoting the maven standard source structure going for   src main java and   src main webapp  The second one should hold eg  the mandatory WEB-INF web xml file but you will never put actual classes there   What you need to change is your target directory  I suggest going with the same standards and choosing the name    target  for this  All the built files will go in here and packaging that up will result a correct deployable artifact  Should you migrate to using maven later  it ll also help doing this in a scripted  repeatable way   Hope that clears up your issue

User · Answer

It depends on which folder one is telling  quot Use as Source Folder quot  to  In the structure on the picture if one says it to the folder  quot target quot  or  quot generated quot   he gets the  quot nested quot  error  But on  quot cxf quot  folder  which is the last  mentioned in the pom xml s  plugin  section and where from the package structure begins  as shown on  wsdl file   i e  - the right folder to do it  source  one  then there is no error

User · Answer

This started taking me down a huge rabbit hole of fixing glitches with Eclipse  however I just deleted the project from Eclipse and reimported it to fix it

User · Answer

Here is a simple solution    Right click the project    properties    build path  In Source tab  Select all the source folders  Remove them  Right click on project  Maven    Update the project

User · Answer

Make two folders  final src  to store the source java code  and final WebRoot    You cannot put the source and the webroot together  I think you may misunderstand your teacher

User · Answer

Got similar issue  Did following steps  issue resolved   Remove project in eclipse  Delete  Project file and   Settings folder  Import project as existing maven project again to eclipse

User · Answer

I had the same problem even when I created a fresh project   I was creating the Java project within Eclipse  then mavenize it  then going into java build path properties removing src  and adding src main java and src test java  When I run Maven update it used to give nested path error   Then I finally realized -because I had not seen that entry before- there is a  lt sourceDirectory gt src lt  sourceDirectory gt  line in pom file written when I mavenize it  It was resolved after removing it

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