Spring 3 0 Unable to locate Spring NamespaceHandler for XML schema namespace

Question

My setup is fairly simple  I have a web front-end  back-end is spring-wired   I am using AOP to add a layer of security on my rpc services   It s all good  except for the fact that the web app aborts on launch       java  SEVERE  Context initialization failed       java  org springframework beans factory parsing BeanDefinitionParsingException  Configuration problem  Unable to locate Spring NamespaceHandler for XML schema namespace  http   www springframework org schema aop        java  Offending resource  ServletContext resource   WEB-INF gwthandler-servlet xml    Here is the snippet from my xml config file    lt beans xmlns  http   www springframework org schema beans         xmlns xsi  http   www w3 org 2001 XMLSchema-instance         xmlns aop  http   www springframework org schema aop         xsi schemaLocation  http   www springframework org schema beans http   www springframework org schema beans spring-beans xsd        http   www springframework org schema aop http   www springframework org schema aop spring-aop xsd  gt       lt aop config gt           lt aop aspect id  security  ref  securityAspect   gt               lt aop pointcut id  securedServices  expression   annotation com fb boog common aspects Secured    gt               lt aop before method  checkSecurity  pointcut-ref  securedServices   gt           lt  aop aspect gt       lt  aop config gt    I read over the internets that it may be my classloading the core of the problem  Doubtful  since here is my WEB-INF lib directory     WEB-INF lib   WEB-INF lib aopalliance-alpha1 jar   WEB-INF lib aspectj-1 6 6 jar   WEB-INF lib commons-collections jar   WEB-INF lib commons-logging jar   WEB-INF lib ehcache-core-1 7 0 jar   WEB-INF lib ejb3-persistence jar   WEB-INF lib hibernate   WEB-INF lib hibernate antlr jar   WEB-INF lib hibernate asm jar   WEB-INF lib hibernate bsh-2 0b1 jar   WEB-INF lib hibernate cglib jar   WEB-INF lib hibernate dom4j jar   WEB-INF lib hibernate freemarker jar   WEB-INF lib hibernate hibernate-annotations jar   WEB-INF lib hibernate hibernate-shards jar   WEB-INF lib hibernate hibernate-tools jar   WEB-INF lib hibernate hibernate jar   WEB-INF lib hibernate jtidy-r8-20060801 jar   WEB-INF lib jabsorb   WEB-INF lib jabsorb jabsorb-1 3 1 jar   WEB-INF lib jta jar   WEB-INF lib jyaml-1 3 jar   WEB-INF lib postgresql-8 4-701 jdbc4 jar   WEB-INF lib sjsxp jar   WEB-INF lib spring   WEB-INF lib spring org springframework aop-3 0 0 RELEASE jar   WEB-INF lib spring org springframework asm-3 0 0 RELEASE jar   WEB-INF lib spring org springframework aspects-3 0 0 RELEASE jar   WEB-INF lib spring org springframework beans-3 0 0 RELEASE jar   WEB-INF lib spring org springframework context-3 0 0 RELEASE jar   WEB-INF lib spring org springframework context support-3 0 0 RELEASE jar   WEB-INF lib spring org springframework core-3 0 0 RELEASE jar   WEB-INF lib spring org springframework expression-3 0 0 RELEASE jar   WEB-INF lib spring org springframework instrument-3 0 0 RELEASE jar   WEB-INF lib spring org springframework instrument tomcat-3 0 0 RELEASE jar   WEB-INF lib spring org springframework jdbc-3 0 0 RELEASE jar   WEB-INF lib spring org springframework jms-3 0 0 RELEASE jar   WEB-INF lib spring org springframework orm-3 0 0 RELEASE jar   WEB-INF lib spring org springframework oxm-3 0 0 RELEASE jar   WEB-INF lib spring org springframework test-3 0 0 RELEASE jar   WEB-INF lib spring org springframework transaction-3 0 0 RELEASE jar   WEB-INF lib spring org springframework web-3 0 0 RELEASE jar   WEB-INF lib spring org springframework web portlet-3 0 0 RELEASE jar   WEB-INF lib spring org springframework web servlet-3 0 0 RELEASE jar   WEB-INF lib spring org springframework web struts-3 0 0 RELEASE jar   WEB-INF lib testng-5 11-jdk15 jar   WEB-INF web xml

User · Answer

I ran into a similar error  but refering to Spring Webflow in a newly created Roo project   The solution for me turned out to be  Project    right-click   Maven   Enable Maven Dependencies  followed by some restarts and republishes to Tomcat      It appeared that STS or m2Eclipse was failing to push all the spring webflow jars into the web app lib directory   I m not sure why   But enabling maven dependency handling and then rebuilding seemed to fix the problem  the webflow jars finally get published and thus it can find the schema namespace references   I investigated this by exploring the tomcat directory that the web app was published to  clicking into WEB-INF lib  while it was running and noticing that it was missing webflow jar files

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I have the same problem with spring 3 0 2 and spring-beans-3 0 xsd   My solution   Create a file META-INF spring schemas in the source folder and copy all necesary definitions  Create spring handlers too   I think that the class PluggableSchemaResolver is not working correctly   http   static springsource org spring docs 3 0 x javadoc-api org springframework beans factory xml PluggableSchemaResolver html  from the javadoc    By default  this class will look for mapping files in the classpath using the pattern  META-INF spring schemas allowing for multiple files to exist on the classpath at any one time    but in my case  this class only read the first spring schemas finded   Grettings  pacovr

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In case someone else runs into this problem  I just did using Eclipse  running the project via the right click action   This error occurred in the J2EE view  but did NOT occur in the Java view   Not sure - assuming something with adding libraries to the correct  lib  directory     I am also using a Maven project  allowing m2eclipse to manage dependancies

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Encountered this error while using maven-shade-plugin  the solution was including   META-INF spring schemas  and  META-INF spring handlers  transformers in the maven-shade-plugin when building          lt plugin gt           lt groupId gt org apache maven plugins lt  groupId gt           lt artifactId gt maven-shade-plugin lt  artifactId gt           lt executions gt               lt execution gt                   lt phase gt package lt  phase gt                   lt goals gt                       lt goal gt shade lt  goal gt                   lt  goals gt                   lt configuration gt                       lt transformers gt                           lt transformer implementation  org apache maven plugins shade resource AppendingTransformer  gt                               lt resource gt META-INF spring handlers lt  resource gt                           lt  transformer gt                           lt transformer implementation  org apache maven plugins shade resource AppendingTransformer  gt                               lt resource gt META-INF spring schemas lt  resource gt                           lt  transformer gt                       lt  transformers gt                   lt  configuration gt               lt  execution gt           lt  executions gt       lt  plugin gt     Credits  Idea to avoid that spring handlers spring schemas get overwritten when merging multiple spring dependencies in a single jar

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Make sure you have all dependencies solved  I run into this problem in my first attempt at AOP  following a spring tutorial  My problem was not having spring-aop jar in my classpath  The tutorial listed all other dependencies I had to add  namely    aspectjrt jar aspectjweaver jar aspectj jar aopalliance jar   But the one was missing  Just one more problem that can contribute to that symptom in the original question   I am using Eclipse  neon   Java SE 8  beans 3 0  spring AOP 3 0  Spring 4 3 4  The problem showed in the Java view --not JEE--  and while trying to just run the application with Right button menu -  Run As -  Java Application

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What IDE  if any  are you using   Does this happen when you re working within an IDE  or only on deployment   If it s deployment  it might be because whatever mechanism of deployment you use -- maven-assembly making a single JAR with dependencies is a known culprit -- is collapsing all your JARs into a single directory and the Spring schema and handler files are overwriting each other

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This trick worked for me too  In Eclipse right-click on the project and then Maven   Update Dependencies

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Did you try putting all your jars directly in the WEB-INF lib dir instead of sub-dirs of that   No WEB-INF lib spring org springframework aop-3 0 0 RELEASE jar  just WEB-INF lib org springframework aop-3 0 0 RELEASE jar  Same with the rest of the jars

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You can also try using the one-jar maven plugin which fixed the problem for us  Simply follow the instructions from here

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If using mvn  check that you have the correct scope  if you have that defined  in your pom xml  I once had it incorrectly set to test but needed it for runtime

User · Answer

http   maven apache org plugins maven-shade-plugin examples resource-transformers html  I ran into a similar problem using the maven-shade-plugin   I found the solution to my problems in their example page above

[java] Spring 3.0: Unable to locate Spring NamespaceHandler for XML schema namespace

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