Cannot change version of project facet Dynamic Web Module to 3 0

Question

I am using maven to create a dynamic webapp in Eclipse  I added some folders like src test java and src test resources  Also I changed the library in Java Build Path to obtain the JavaSE-1 7  It s all OK up to here   When I tried to change the Projects Facet Dynamic Web Module something  went wrong  I had change the Java to 1 7 in the same place  And it still told me  cannot change version of project facet Dynamic Web Module to 3 0   I have changed everything that would effect the changing I think

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I think I had the same problem as you  My web xml had version 2 5 while the project had the  right-click on Project-  Properties-  Project Facets-   Dynamic Web Module 2 3   Although I tried to change the version from 2 3 to 2 5 ECLIPSE did not permit it   Solution  I removed the check mark under the heading Dynamic Web Module  I saved and I had Update Project  Automatically re-awakening is entering the box with the correct version  I use Eclipse Kepler    p s   look at the comments of Jonathan just below  very useful

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Delete    settings   classpatch   projejct  target   and import again the maven project

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I tried many of the answers here  but none of them worked for me  Then I found an article about my problem here  I thought of sharing it here too   Below are the steps taken in brief    Set Compiler compliance level  Update project facet Update installed JRE from preferences  Adding configuration in pom xml to use java 1 7 and finally updating project from Maven

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Open the org eclipse wst common project facet core xml file and change the jst web version to 3 0  Also update the web xml to version 3 0  Save and update the project  Hope this helps  I am using Eclipse Juno

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I had the same issue  deleting the  settings folder resolved the issue

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For a maven eclipse web project  changing dynamic web module version needs to check three places  If one uses eclipse  and after you have checked the following  1  web xml    lt web-app xmlns  http   java sun com xml ns javaee           xmlns xsi  http   www w3 org 2001 XMLSchema-instance           xsi schemaLocation  http   java sun com xml ns javaee            http   java sun com xml ns javaee web-app 3 0 xsd      version  3 0  gt    2  maven     lt dependency gt         lt groupId gt javax servlet lt  groupId gt         lt artifactId gt javax servlet-api lt  artifactId gt         lt version gt 3 0 1 lt  version gt         lt scope gt provided lt  scope gt       ensure you have tomcat 7 not other version  lt  dependency gt    lt plugin gt         lt groupId gt org apache maven plugins lt  groupId gt         lt artifactId gt maven-compiler-plugin lt  artifactId gt         lt version gt 3 0 lt  version gt         lt configuration gt               lt source gt 1 7 lt  source gt     at least 6              lt target gt 1 7 lt  target gt         lt  configuration gt   lt  plugin gt    3  eclipse build path and compiler version is 1 7  you still have an error marker at maven   cannot change version of project facet dynamic web module to 3 0 one or more constrants have not been satisfied   Then you can  uncheck the dynamic web module  and recheck it  I think it is because  settings of eclipse file is corrupted somehow  About the second tip tomcat which version is a good note

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Best and simple steps solved this problem for me is  1  Properties -  Project Facets -  Deselect unmark the check box of Dynamic Web Module -  Apply 2 Now change to the desired version Apply 3 Check the Dynamic web Module check box   --Now your are done--

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Doing maven update or reimporting the project did not help   Sydney s answer is right  in addition I have to recreate the project in different workspace as  said in JavaServer Faces 2 2 requires Dynamic Web Module 2 5 or newer

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What worked for me    Change the Java to 1 8  or 1 7    In your POM - you have to set compiler plugin to version 1 8  or 1 7  in  lt build gt  section      lt build gt                 lt plugins gt           lt plugin gt             lt groupId gt org apache maven plugins lt  groupId gt             lt artifactId gt maven-compiler-plugin lt  artifactId gt             lt version gt 3 6 0 lt  version gt             lt configuration gt               lt source gt 1 8 lt  source gt               lt target gt 1 8 lt  target gt             lt  configuration gt           lt  plugin gt           lt  plugins gt         lt  build gt    Ensure that change Java Build shows 1 8  If it does not - click EDIT and select what it should be      Modify web xml so 3 0 is referenced in version and in the link      Ensure you have Java set to 1 8 in Project Facets      At this stage I still could not change Dynamic Web Module     Instead of changing it   a  uncheck the Dynamic Web Module  b  apply  c  check it again  New version 3 0 should be set       After applying and checking it again     Hope this helps

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updating maven worked for me  select project then press ALT F5 then select project click ok

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This Problem With version right click on the project- properties- Project Facets- right click on Dynamic Web Module- unlock it-  uncheck- select 2 5 version- Apply- Update the maven

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I got this error when I try to convert a general Java Project to Maven Project   What I did was to determine the Java compiler version which is required by my project  For my project  the minimum Java version is 1 8   By lowering the version to anything lower than 1 8 my IDE will start complaining that it does not recognize a bunch of imported libraries  hence I determine mine minimum Java version as 1 8  1  Right click your project 2  Go to Properties 3  Left hand-side panel  click  Project Facets  4  For Java  set the version according to your minimum version     Now make sure the Java compiler version uses the same Java version as what you have set in Project Facets   1  Right click your project 2  Go to Porperties 3  Left hand-side panel  click  Java Compiler  4  Make sure Java Compiler version is the same   5  If it is not the same  change the version   Uncheck  Use compliance from execution environment  if needed to make the changes      After the changes  the error should be resolved  If the error is still there  right-click project -  Maven -  Update Project

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I had the same problem - I just removed the project from my workspace  then cleaned up the  eclipse files folders  for example   project   settings  etc  then imported the maven project again  it worked

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Click on your project folder  Go to Window   Show View   Navigator Go to Navigator and expand the  settings folder Open org eclipse wst common project facet core xml file   lt  xml version  1 0  encoding  UTF-8   gt   lt faceted-project gt     lt fixed facet  wst jsdt web   gt     lt installed facet  jst web  version  2 3   gt     lt installed facet  wst jsdt web  version  1 0   gt     lt installed facet  java  version  1 8   gt   lt  faceted-project gt   Change the version like this   lt installed facet  jst web  version  3 1   gt  Save Just update your project  Right Click on The Project Folder   Maven   Update Project   Select the Project and click  Ok    Just this worked to me

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Another way is to edit the project facet configuration file itself  org eclipse wst common project facet core xml  Change the dynamic web module version in this line to 3 0 -  lt installed facet  jst web  version  2 5   gt    And then    Right-click on the project  in the Project Explorer panel   Select Maven    Update Project  or press Alt F5    You ll find this file in the  settings directory within the Eclipse project

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Open web xml from project structure http   java sun com xml ns javaee web-app 3 0 xsd      version  3 0       Servlet 3 0 Web Application   and update web xml file for example change version    2 5   Also change the org eclipse wst common project facet core xml file from your project  settings file Follow the steps 1  Window   Show View   Other   General   Navigator   There is a  settings folder under your project directory Change the dynamic web module version in this line to 2 5 4 Change the Java version in this line to 1 5 or higher    Now refresh your project and get set to run on your server    Do follow the blog for the solution  http   scrapillars blogspot in 2014 02 how-to-change-project-facet-in-eclipse html  The solution is produced with image illustrations

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I had the same symptom with a different cure  I was trying to upgrade my JSF 2 2 4 Spring 3 0 webapp to JSF 2 3 in order to enjoy the new JSF websocket hooks there and Eclipse  actually STS  would not cooperate  In Eclipse s Project Facets  JSF 2 3 never became available until I edited directly the org eclipse wst common project facet core xml file as directed in previous answers - the highest it would go was 2 2   Here are the hoops I jumped through  I don t know that all of these were necessary because I fundamentally don t understand all this configuration    In Eclipse I frequently got a scary warning   Modifying a faceted project when implementations of one or more installed facets are not available can potentially result in a corrupted project  Are you sure you want to proceed   This prompted me to do more frequent commits but no corruption occurred    Upgrade JDK from 1 7 to 1 8 in POM  Eclipse compiler  and Eclipse Project Facets  Update the following Maven dependencies    lt dependency gt       lt groupId gt javax servlet lt  groupId gt       lt artifactId gt servlet-api lt  artifactId gt       lt version gt 2 4 lt  version gt       lt scope gt provided lt  scope gt   lt  dependency gt        to    lt dependency gt       lt groupId gt javax servlet lt  groupId gt       lt artifactId gt javax servlet-api lt  artifactId gt       lt version gt 4 0 0 lt  version gt       lt scope gt provided lt  scope gt   lt  dependency gt         and           lt dependency gt           lt groupId gt com sun faces lt  groupId gt           lt artifactId gt jsf-api lt  artifactId gt           lt version gt 2 2 4 lt  version gt       lt  dependency gt       lt dependency gt           lt groupId gt com sun faces lt  groupId gt           lt artifactId gt jsf-impl lt  artifactId gt           lt version gt 2 2 4 lt  version gt       lt  dependency gt        to        lt dependency gt           lt groupId gt javax faces lt  groupId gt           lt artifactId gt javax faces-api lt  artifactId gt           lt version gt 2 3 lt  version gt           lt scope gt provided lt  scope gt       lt  dependency gt       lt dependency gt           lt groupId gt org glassfish lt  groupId gt           lt artifactId gt javax faces lt  artifactId gt           lt version gt 2 3 0 lt  version gt       lt  dependency gt       lt dependency gt           lt groupId gt javax enterprise lt  groupId gt           lt artifactId gt cdi-api lt  artifactId gt           lt version gt 2 0 lt  version gt       lt  dependency gt    I had to update my web xml namespace declarations from    lt web-app xmlns xsi  http   www w3 org 2001 XMLSchema-instance  xmlns  http   java sun com xml ns javaee  xmlns web  http   java sun com xml ns javaee web-app 2 5 xsd   xsi schemaLocation  http   java sun com xml ns javaee http   java sun com xml ns javaee web-app 2 5 xsd  id  WebApp ID  version  2 5  gt        to    lt web-app xmlns xsi  http   www w3 org 2001 XMLSchema-instance  xmlns  http   java sun com xml ns javaee  xmlns web  http   java sun com xml ns javaee   xsi schemaLocation  http   java sun com xml ns javaee http   java sun com xml ns javaee web-app 3 0 xsd  id  WebApp ID  version  3 0  gt    I had to update Project Facets -  Dynamic Web Module from 2 5 to 3 0  I tried 3 1 but got errors    In this process I frequently got the error in the title of this post   Cannot change version of project facet Dynamic Web Module to 3 0  and Eclipse refused to compile the project or offer JSF 2 3 in the Project Facets  When I edited the org eclipse wst common project facet core xml file as directed the errors disappeared  Eclipse offered JSF 2 3 in Project Facets  and the project compiled and ran fine on Tomcat 9 0 8  However  Project Facets still warned  Implementation of version 2 3 of project facet jst jsf could not be found  Functionality will be limited   I suspect this simply means that autocomplete and other Eclipse conveniences will not be available because it cannot find the JSF 2 3 implementation declared in my POM   Hope this helps someone  Google searches yielded only this post by Ali Bassam and indirectly BalusC which helped

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you please open the Navigator view  and following step    Window   Show View   Other   General  and find that there is a  settings folder under your project  expand it and then open the file  org eclipse wst common project facet core xml   make the below changes and save the file   Change the dynamic web module version in this line to 2 5 -   Change the Java version in this line to 1 5 or higher -

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I had the same issue  editing web xml as well as changing file in  settings folder alone didn t help  My solution was to directly point maven compiler plugin to use the desired java version by editing pom xml      lt build gt               lt plugins gt         lt plugin gt           lt artifactId gt maven-compiler-plugin lt  artifactId gt           lt version gt 3 1 lt  version gt           lt configuration gt             lt source gt 1 7 lt  source gt             lt target gt 1 7 lt  target gt           lt  configuration gt         lt  plugin gt       lt  plugins gt         lt  build gt     Now run Maven- Update project and after that you can change servlets version in properties- project facets- Dynamic Web module version or  as written earlier  by manually editing org eclipse wst common project facet core xml in  settings folder of your project

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This is a variation on pagurix s answer  but using Eclipse Mars    Change your web xml file to web bak   Ignore the errors  we ll regenerate it next    Go into project properties -  project facets and set the Dynamic Web Module version to what you need  Eclipse now allows you to save    Now right-click on the project  Choose Java EE Tools -  Generate Deployment Descriptor Stub    This creates a new web xml with the required version    Open the new web xml and copy across the XML header and the complete web-app opening tag to your original web bak  delete the new web xml and rename web bak back to web xml   Done

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I updated my web xml   lt web-app xmlns  http   java sun com xml ns javaee           xmlns xsi  http   www w3 org 2001 XMLSchema-instance           xsi schemaLocation  http   java sun com xml ns javaee            http   java sun com xml ns javaee web-app 3 0 xsd      version  3 0  gt       lt display-name gt Servlet 3 0 Web Application lt  display-name gt   lt  web-app gt    and then just Maven -  Update Project

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If answer by Sydney still doesn t help then try below  After following Sydney s answer  goto Properties   Projects Facets deselect Dynamic Web Module and then change the version to match your web config and then select again  Apply   Save Then Maven Update   web xml   lt web-app xmlns xsi  http   www w3 org 2001 XMLSchema-instance  xmlns  http   xmlns jcp org xml ns javaee  xmlns web  http   xmlns jcp org xml ns javaee web-app 3 1 xsd  xsi schemaLocation  http   xmlns jcp org xml ns javaee http   xmlns jcp org xml ns javaee web-app 3 1 xsd  id  Web App 1  version  3 1  gt    lt display-name gt JavaServerFaces lt  display-name gt    lt  -- Change to  Production  when you are ready to deploy -- gt   lt context-param gt       lt param-name gt javax faces PROJECT STAGE lt  param-name gt       lt param-value gt Development lt  param-value gt   lt  context-param gt    lt  -- Welcome page -- gt   lt welcome-file-list gt       lt welcome-file gt jsfs hello xhtml lt  welcome-file gt   lt  welcome-file-list gt    lt  -- JSF mapping -- gt   lt servlet gt       lt servlet-name gt Faces Servlet lt  servlet-name gt       lt servlet-class gt javax faces webapp FacesServlet lt  servlet-class gt       lt load-on-startup gt 1 lt  load-on-startup gt   lt  servlet gt    lt  -- Map these files with JSF -- gt   lt servlet-mapping gt       lt servlet-name gt Faces Servlet lt  servlet-name gt       lt url-pattern gt jsfs   lt  url-pattern gt   lt  servlet-mapping gt   lt servlet-mapping gt       lt servlet-name gt Faces Servlet lt  servlet-name gt       lt url-pattern gt   jsf lt  url-pattern gt   lt  servlet-mapping gt   lt servlet-mapping gt       lt servlet-name gt Faces Servlet lt  servlet-name gt       lt url-pattern gt   faces lt  url-pattern gt   lt  servlet-mapping gt   lt servlet-mapping gt       lt servlet-name gt Faces Servlet lt  servlet-name gt       lt url-pattern gt   xhtml lt  url-pattern gt   lt  servlet-mapping gt

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Their is one more way to resolve this problem  check it out hope it will help you to solve your problem   PROBLEM  Cannot change version of project facet dynamic web module 2 3 to 3 0  SOLUTION    Go to your project location  ex -D  maven todo  go to  setting folder check for this file  org eclipse wst common project facet core xml open the file and change  jst web  property from 2 3 to 3 0  and save Right click on project refresh the project and update maven  Done

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The web xml trick works because you re now explicitly telling WTP that you are using that specific servlet version  regardless of what the container supports    In my case  I am using the annotation config within a Maven project and I do not have a web xml file  It turns out that in the absence of a web xml  WTP looks at your Maven dependencies to determine what Servlet version to use  In my case  I had defined the following    lt dependency gt     lt groupId gt javax lt  groupId gt     lt artifactId gt javaee-api lt  artifactId gt     lt version gt 7 0 lt  version gt     lt scope gt provided lt  scope gt   lt  dependency gt    Changing it to 6 0 fixed the problem and it s now using Servlet 3 0 instead of 3 1  which is the default for JavaEE 7  Since I had to go from Tomcat 8 to Tomcat 7  Tomcat 7 only supports the JavaEE 6 Web profile  Now things work wonderfully

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I resolved the issue by modifying web xml with correct version xsd locations and modifying org eclipse wst common project facet core xml with correct version and doing maven update

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Just want to share my own experience  I find that my Dynamic Web Module is locked  it is solved with the following steps  First  Right click project  gt  Properties  gt  Project Facets  gt  Right click Dynamic Web Module  gt  Unlock  gt  Apply and close  Second  Right click project  gt  Maven  gt  Update Project  gt  OK

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In my case the web xml was referenced by a dtd  After I changed this to xsd reference like the one posted by Sydney it worked

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Mine was Web Module 3 0 in web xml  but in properties gt Dynamic Web Module It was on 3 1  I changed the web xml to this    lt  xml version  1 0  encoding  UTF-8   gt   lt web-app xmlns xsi  http   www w3 org 2001 XMLSchema-instance  xmlns  http   java sun com xml ns javaee  xmlns web  http   java sun com xml ns javaee web-app 3 0 xsd  xsi schemaLocation  http   java sun com xml ns javaee http   java sun com xml ns javaee web-app 3 1 xsd  id  WebApp ID  version  3 1  gt    after this change  do  right click on project gt Maven gt Update Project

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My solution to the problem that didn t allowed me to change the version of project facet Dynamic Web Module in Eclipse  Mars  was    Disable Maven Nature Ensure that the web xml namespaces point to right version Re-enable Maven Nature Maven    Update Project  or press Alt F5

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Right click the project  rarr  Properties  in Project Facets  deselect Dynamic Web Module  version should be 3 1  and deselect JavaServer Faces  version is 2 2    Change this      lt web-app version  3 1  xmlns  http   xmlns jcp org xml ns javaee  xmlns xsi  http   www w3 org 2001 XMLSchema-instance       xsi schemaLocation  http   xmlns jcp org xml ns javaee http   xmlns jcp org xml ns javaee web-app 3 1 xsd  gt    to this    lt web-app xmlns xsi  http   www w3 org 2001 XMLSchema-instance      xmlns  http   java sun com xml ns javaee  xmlns javaee  http   xmlns jcp org xml ns javaee      xsi schemaLocation  http   java sun com xml ns javaee http   java sun com xml ns javaee web-app 3 0 xsd      version  3 0  gt    Then remove the prefix before param-name and the like   Finally  Maven -  Update project

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I had the same issue and I even tried to remove the project and add it again  What did the trick was to remove the  settings directory

[java] Cannot change version of project facet Dynamic Web Module to 3.0?

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