The ResourceConfig instance does not contain any root resource classes

Question

What s going wrong here   The ResourceConfig instance does not contain any root resource classes  Dec 10  2010 10 21 24 AM com sun jersey spi spring container servlet SpringServlet initiate SEVERE  Exception occurred when intialization com sun jersey api container ContainerException  The ResourceConfig instance does not contain any root resource classes          at com sun jersey server impl application RootResourceUriRules  lt init gt  RootResourceUriRules java 103          at com sun jersey server impl application WebApplicationImpl  initiate WebApplicationImpl java 1182          at com sun jersey server impl application WebApplicationImpl access 600 WebApplicationImpl java 161          at com sun jersey server impl application WebApplicationImpl 12 f WebApplicationImpl java 698          at com sun jersey server impl application WebApplicationImpl 12 f WebApplicationImpl java 695          at com sun jersey spi inject Errors processWithErrors Errors java 197          at com sun jersey server impl application WebApplicationImpl initiate WebApplicationImpl java 695          at com sun jersey spi spring container servlet SpringServlet initiate SpringServlet java 117    Filter    lt filter gt       lt filter-name gt JerseyFilter lt  filter-name gt       lt filter-class gt com sun jersey spi spring container servlet SpringServlet lt  filter-class gt        lt init-param gt           lt param-name gt com sun jersey config feature Redirect lt  param-name gt           lt param-value gt true lt  param-value gt       lt  init-param gt        lt init-param gt           lt param-name gt com sun jersey config property JSPTemplatesBasePath lt  param-name gt           lt param-value gt  views  lt  param-value gt       lt  init-param gt        lt init-param gt           lt param-name gt com sun jersey config property WebPageContentRegex lt  param-name gt           lt param-value gt   images css jsp     lt  param-value gt       lt  init-param gt   lt  filter gt    lt filter-mapping gt       lt filter-name gt JerseyFilter lt  filter-name gt       lt url-pattern gt  myresource   lt  url-pattern gt   lt  filter-mapping gt    Code    Path    admin   public class AdminUiResource       GET    Produces   text html      Path    singup     public Viewable getSignUp          return new Viewable   public signup    Test

User · Answer

Another thing to check is a combination of previous entries

You can have in your web.xml file this:

<init-param>
        <param-name>com.sun.jersey.config.property.packages</param-name>
        <param-value>com.acme.rest</param-value>
</init-param>

and you can have

<context-param>
    <param-name>resteasy.scan</param-name>
    <param-value>false</param-value>
</context-param>
<context-param>
    <param-name>resteasy.scan.providers</param-name>
    <param-value>false</param-value>
</context-param>
<context-param>
    <param-name>resteasy.scan.resources</param-name>
    <param-value>false</param-value>
</context-param>

but you cannot have both or you get this sort of error. The fix in this case would be to comment out one or the other (probably the first code snippet would be commented out)

User · Answer

I am getting this exception  because of a missing ResourseConfig in Web xml   Add    lt init-param gt       lt param-name gt com sun jersey config property packages lt  param-name gt       lt param-value gt    Name of Package where your service class exists    lt  param-value gt   lt  init-param gt    Service class means  class which contains services like    Path   orders

User · Answer

I had the same issue with trying to run the webapp from an eclipse project  As soon I copied the  class files to  WEB-INF classes it worked perfectly

User · Answer

that issue is because jersey can t find a dependecy package for your rest service declarated  check your project package distribution and assert that is equals to your web xml param value

User · Answer

Probably too late but this is how I resolved this error   If this solution is not working     lt init-param gt       lt param-name gt com sun jersey config property packages lt  param-name gt       lt param-value gt    Name of Package where your service class exists    lt  param-value gt   lt  init-param gt    In eclipse    RightClick on your Project Or Select Project and press Alt   Enter On the left-hand side of the opened window find Java Build Path  Select Libraries from the right tab panel  If there is anything which is corrupted or showing cross mark on top of the jars  remove and add the same jar again   Apply and Close  Rebuild your project

User · Answer

I am new to Jersey - I had the same issue  But when I removed the     and just used the  path  admin   it worked     Path  admin   public class AdminUiResource

User · Answer

I also got this kind of error  please take care of the configurations in xml   I wrote com sun jersey comfig property packages  Instead of  com sun jersey config property packages  After correction it s working

User · Answer

Same issue - web xml looked like this    lt servlet gt       lt servlet-name gt JerseyServlet lt  servlet-name gt       lt servlet-class gt com sun jersey spi container servlet ServletContainer lt  servlet-class gt       lt init-param gt           lt param-name gt javax ws rs Application lt  param-name gt           lt param-value gt com mystuff web JerseyApplication lt  param-value gt       lt  init-param gt        Providing a custom application overrides any XML configured auto detection of classes  You need to implement the right methods to write your own code to wire up the classes  See the javadocs

User · Answer

Well  it s a little late to reply  I have faced the same problem and my Google searches were in vain  However  I managed to find what the problem was  There might be many reasons for getting this error but I got the error due to the following and I wanted to share this with my fellow developers    I previously used Jersey 1 3 and I was getting this error  But when I upgraded the jars to the latest version of Jersey  this issue was resolved  Another instance in which I got this error was when I was trying to deploy my service into JBoss by building a war file   I made the mistake of including the Java files in the  war instead of java classes

User · Answer

It happened to me when I deployed my main jar  without checking the add directory entries box in the export jar menu in Eclipse

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This means  it couldn t find any class which can be executed as jersey RESTful web service   Check     Whether  com sun jersey config property packages  is missing in your web xml   Whether value for  com sun jersey config property packages  param is missing or invalid  the mentioned package doesn t exists   It should be a package where you have put your POJO classes which runs as jersey services  Whether there exists at least one POJO class  which has a method annotated with  Path attribute

User · Answer

I ran across this problem with JBOSS EAP 6 1   I was able to deploy my code through eclipse to the JBOSS server but once I attempted to deploy the file as a WAR file to JBOSS I started getting this error     The solution was configuring the web xml to work properly with JBOSS by allowing the two to work together   The following two lines were commented out in web xml to allow JBOSS to do it s own configurations   lt  --        lt init-param gt       lt param-name gt com sun jersey config property packages lt  param-name gt       lt param-value gt com your package lt  param-value gt   lt  init-param gt  -- gt    And then add the following context params after    lt context-param gt       lt param-name gt resteasy scan lt  param-name gt       lt param-value gt false lt  param-value gt   lt  context-param gt   lt context-param gt       lt param-name gt resteasy scan resources lt  param-name gt       lt param-value gt false lt  param-value gt   lt  context-param gt   lt context-param gt       lt param-name gt resteasy scan providers lt  param-name gt       lt param-value gt false lt  param-value gt   lt  context-param gt

User · Answer

Another possible cause of this error is that you have forgotten to add the libraries that are already in the  WEBINF lib folder to the build path  e g  when importing a  war-file and not checking the libraries when asked in the wizard   Just happened to me

User · Answer

YOU NEED TO ADD YOUR PACKAGE NAME AT    lt init-param gt     lt param-name gt com sun jersey config property packages lt  param-name gt     lt param-value gt your package name lt  param-value gt   lt  init-param gt       ALSO ONE SILLY THING I HAVE NOTICED    I Need to refresh my project after MAVEN BUILD else it show me same error Please comment If you know reason why we need to refresh project

User · Answer

I had to add a trailing forward slash to the end of  path   Path    admin

User · Answer

Your resource package should contain at least one pojo which is either annotated with  Path or have at least one method annotated with  Path or a request method designator  such as  GET   PUT   POST  or  DELETE  Resource methods are methods of a resource class annotated with a request method designator  This resolved my issue

User · Answer

Have you tried adding    lt init-param gt     lt param-name gt com sun jersey config property packages lt  param-name gt     lt param-value gt my package name lt  param-value gt   lt  init-param gt    to your SpringServlet definition   Obviously replace my package name with the package that AdminUiResource is in and make sure it is in the classpath

User · Answer

yes adding the init param for com sun jersey config property packages fixed this issue for me   was merging a jersey rest services into maven based spring application and got this error

User · Answer

Also came accross this problem  twice for different reasons  The first time I forgot to include   lt init-param gt   lt param-name gt com sun jersey config property packages lt  param-name gt   lt param-value gt my package name lt  param-value gt   lt  init-param gt    as described in previous comments  and once I did that  it started working   Yet    another day I started Eclipse  expecting to continue where I left off  and instead of having my program working  it showed the very same error once again  I started checking if I accidentally had made some changes and saved corrupted file  but could find no such error and the file looked exactly like examples I have  all in order  Since it worked the day before  after some initial searching  I thought  well  maybe it s a Eclipse  or Tomcat glitch or something  so let s just try to make some changes and see if it reacts  So  I did a space   backspace in web xml file  just to fool Eclipse that the file is changed  and saved it then  The next step was restarting Tomcat server  from Eclipse IDE  and voila  it works again   Maybe someone with broader experience could explain what the problem really was behind all of this

User · Answer

I had the same issue  testing a bunch of different examples  and tried all the possible solutions  What finally got it working for me was when I added a  Path     over the class line  I had left that out

User · Answer

In my case I have added the jars twice in build path after importing from war  It worked fine after removing the extra jars which was showing error deployment descriptor error pages  adding   lt init-param gt             lt param-name gt com sun jersey config property packages lt  param-name gt             lt param-value gt service package name lt  param-value gt   lt  init-param gt

User · Answer

Main cause of this Exception is   You have not given the proper package name where you using the  Path or forgot to configure in web xml   Configuration file Rest API Class File package Name   Your Class Package Name   Check this Configuration inside  lt init-param gt

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Ok    For me work fine just only assigning the  servlet-class  to com sum jersey spi container servlet ServletContainer  I am using IDE  Eclipse Mars    lt servlet gt           lt servlet-name gt Jersey Web Application lt  servlet-name gt           lt servlet-class gt com sun jersey spi container servlet ServletContainer lt  servlet-class gt           lt load-on-startup gt 1 lt  load-on-startup gt       lt  servlet gt       lt servlet-mapping gt           lt servlet-name gt Jersey Web Application lt  servlet-name gt           lt url-pattern gt  frontend   lt  url-pattern gt       lt  servlet-mapping gt    but for some reason I had to reboot my computer in order to work in my localhost  If still not work  You have to add in your web xml this code in between  servlet  tag     lt init-param gt     lt param-name gt com sun jersey config property packages lt  param-name gt     lt param-value gt the package name lt  param-value gt   lt  init-param gt     the package name  is the package name where you have your classes  If you are using IDE  refresh the project and run again in Tomcat  still not work  reboot your computer and will work

User · Answer

Had the same issue and found out it was a problem with the way I deployed my source code   As the error message says      does not contain any root resource classes    So it couldn t find any resource classes in the configured package   I just deployed the classes wrong - that s why it didn t pick it up   I forgot to deploy my class files in the  WEB-INF classes directory of the WAR - initially I just had it directly in the root of the WAR file   So when it looked for resource classes it didn t find them - because they existed in a different  wrong  location

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Basically I corrected it like below and everything worked fine    lt servlet gt       lt servlet-name  gt MyWebApplication lt  servlet-name gt       lt servlet-class gt com sun jersey spi container servlet ServletContainer lt  servlet-class gt       lt init-param gt           lt param-name gt com sun jersey config feature Redirect lt  param-name gt           lt param-value gt true lt  param-value gt       lt  init-param gt       lt init-param gt           lt param-name gt com sun jersey config property JSPTemplatesBasePath lt  param-name gt           lt param-value gt  views  lt  param-value gt       lt  init-param gt       lt init-param gt           lt param-name gt com sun jersey config property WebPageContentRegex lt  param-name gt           lt param-value gt   images css jsp     lt  param-value gt       lt  init-param gt   lt  servlet gt    lt servlet-mapping gt       lt servlet-name gt MyWebApplication lt  servlet-name gt       lt url-pattern gt  myapp   lt  url-pattern gt   lt  servlet-mapping gt

[jersey] The ResourceConfig instance does not contain any root resource classes

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