Annotation-specified bean name conflicts with existing non-compatible bean def

Question

I m having a problem with some Spring bean definitions  I have a couple of context xml files that are being loaded by my main   method  and both of them contain almost exclusively a  tag  When my main method starts up  I get this error from Spring   Caused by  org springframework context annotation ConflictingBeanDefinitionException  Annotation-specified bean name  converterDAO  for bean class  my package InMemoryConverterDaoImpl  conflicts with existing  non-compatible bean definition of same name and class  my other package StaticConverterDAOImpl    Both DAO classes are annotated this way    Repository  converterDAO   public class StaticConverterDAOImpl implements ConverterDAO           The in-memory dao also has the  Repository  converterDAO   annotation  The dao is referenced in other classes like this       private  Autowired  Qualifier  converterDAO   ConverterDAO converterDAO        I want one DAO to override the definition of the other one  which as I always understood it was one of the principal reasons to use a DI framework in the first place  I ve been doing this with xml  definitions for years and never had any problems  But not so with component scans and annotated bean definitions  And what does Spring mean when it says they are not  compatible   They implement the same interface  and they are autowired into fields that are of that interface type  Why the heck are they not compatible   Can someone provide me with a way for one annotated  component-scanned bean to override another   -Mike

User · Answer

I had a similar problem  and it was because one of my beans had been moved to another directory recently  I needed to do a  build clean  by deleting the build classes java directory and the problem went away   The error message had the two different file paths conflicting with each other  although I knew one should not actually exist anymore

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Explanation internal working on this error  You are getting this error because after instantiation the container is trying to assign same object to both classes as class name is same irrespective of different packages      thats why error says non compatible bean definition of same name     Actually how it works internally is---       pkg test1        RestController class Test    pkg test2        RestController class Test    First container will get class Test and  RestController indicates it to instantiate as   test   new Test    and it won   t instantiate twice  After instantiating container will provide a reference variable test same as class name  to both the classes and while it provide test reference  To second class it gets non compatible  bean definition of same name         Solution         Assign a refrence name to both rest controller so that container won   t instantiate with default name and instantiate saperately for both classes irrespective  Of same name  For example           pkg test1        RestController    test1     class Test    pkg test2        RestController    test2     class Test    Note The same will work with  Controller  Service  Repository etc    Note  if you are creating reference variable at class level then you can also annotate it with  Qualifier  specific refrence name   for example   Autowired  Qualifier  test1   Test test

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In an XML file  there is a sequence of declarations  and you may override a previous definition with a newer one  When you use annotations  there is no notion of before or after  All the beans are at the same level  You defined two beans with the same name  and Spring doesn t know which one it should choose    Give them a different name  staticConverterDAO  inMemoryConverterDAO for example   create an alias in the Spring XML file  theConverterDAO for example   and use this alias when injecting the converter    Autowired  Qualifier  theConverterDAO

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I had a similar problem  with two jar libraries  app1 and app2  in one project  The bean  quot BeanName quot  is defined in app1 and is extended in app2 and the bean redefined with the same name  In app1  package com foo app1 pkg1    Component  quot BeanName quot   public class Class1          In app2  package com foo app2 pkg2    Component  quot BeanName quot   public class Class2 extends Class1          This causes the ConflictingBeanDefinitionException exception in the loading of the applicationContext due to the same component bean name  To solve this problem  in the Spring configuration file applicationContext xml       lt context component-scan base-package  quot com foo app2 pkg2 quot   gt       lt context component-scan base-package  quot com foo app1 pkg1 quot  gt           lt context exclude-filter type  quot assignable quot  expression  quot com foo app1 pkg1 Class1 quot   gt       lt  context component-scan gt   So the Class1 is excluded to be automatically component-scanned and assigned to a bean  avoiding the name conflict

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I had a similar issue with Spring 4 x using  RestController  Two different packages had a class with the same name     package com x catalog   RestController public class TextureController        package com x cms  RestController public class TextureController         The fix was easy     package com x catalog   RestController  CatalogTextureController   public class TextureController        package com x cms  RestController  CMSTextureController   public class TextureController         The problem seems to be that the annotation gets autowired and takes the class name by default  Giving it an explicit name in the  RestController annotation allows you to keep the class names

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Sometimes the problem occurs if you have moved your classes around and it refers to old classes  even if they don t exist    In this case  just do this     mvn eclipse clean  mvn eclipse eclipse   This worked well for me

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Refresh gradle project on Eclipse solved this problem for me

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Scenario   I am working on a multi-module Gradle project    Modules are   - core   - service  - geo  - report  - util and - some other modules    So primarily we have prepared a Component locationRecommendHttpClientBuilder  in geo module    Java Code   import org springframework stereotype Component   Component  locationRecommendHttpClientBuilder   class LocationRecommendHttpClientBuilder extends PanaromaHttpClientBuilder        Override     PanaromaHttpClient buildFromConfiguration             this setURL PanaromaConf getInstance   getString  locationrecommend url            this setMethod PanaromaConf getInstance   getString  locationrecommend method            this setProxyHost PanaromaConf getInstance   getString  locationrecommend proxy host            this setProxyPort PanaromaConf getInstance   getInt  locationrecommend proxy port   0           return super build             application-context xml   lt bean id  locationRecommendHttpClient        class  au co google panaroma platform logic impl PanaromaHttpClient        scope  singleton  factory-bean  locationRecommendHttpClientBuilder        factory-method  buildFromConfiguration    gt    Then it is decided to add this component in core module   One engineer has previous code for geo module and then he has taken the latest module of core but he forgot to take the latest geo module   So the component locationRecommendHttpClientBuilder  is double times in his project and he was getting the following error      Caused by    org springframework context annotation ConflictingBeanDefinitionException    Annotation-specified bean name  LocationRecommendHttpClientBuilder    for bean class    au co google app locationrecommendation builder LocationRecommendHttpClientBuilder    conflicts with existing  non-compatible bean definition of same name   and class    au co google panaroma platform logic impl locationRecommendHttpClientBuilder    Solution Procedure   After removal the component from geo module  component locationRecommendHttpClientBuilder  is only available in core module  So there is no conflicting situation  Issue is solved by this way

User · Answer

Using Eclipse  I had moved classes into new packages  and was getting this error   What worked for me was doing  Project   Clean  and also cleaning my TomCat server by right-clicking on it and selecting clean  Thanks to Rock Lee s answer for helping me figure it out

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If none of the other answers fix your problem and it started occurring after change any configuration direct or indirectly  via git pull   merge   rebase  and your project is a Maven project   mvn clean   Hope this fixes your problem  Or someones

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I also had a similar problem  I built the project again and the issue was resolved    The reason is  there are already defined sequences for the Annotation-specified bean names  in a file  When we do a change on that bean name and try to run the application Spring cannot identify which one to pick  That is why it shows this error   In my case  I removed the previous bean class from the project and added the same bean name to a new bean class  So Spring has the previous definition for the removed bean class in a file and that conflicts with the newly added class while compiling  So if you do a  build clean   previous definitions for bean classes will be removed and compilation will success

User · Answer

I had the same issue  I solved it by using the following steps Editor  IntelliJ    View - gt  Tool Windows - gt  Maven Project  Opens your projects in a sub-window  Click on the arrow next to your project  Click on the lifecycle  Click on clean

User · Answer

I faced this issue when I imported a two project in the workspace  It created a different jar somehow so we can delete the jars and the class files and build the project again to get the dependencies right

[spring] Annotation-specified bean name conflicts with existing, non-compatible bean def

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