Spring Boot java lang NoClassDefFoundError javax servlet Filter

Question

I Started a new project with Spring Boot 1 2 3  I m getting error   java lang NoClassDefFoundError  javax servlet Filter   Gradle Dependencies    dependencies       compile  org springframework boot spring-boot-starter-actuator       compile  org springframework boot spring-boot-starter-data-jpa       compile  org springframework boot spring-boot-starter-security       compile  org springframework boot spring-boot-starter-thymeleaf       compile  org springframework boot spring-boot-starter-web       compile  org codehaus groovy groovy       compile  com h2database h2       compile  org thymeleaf extras thymeleaf-extras-springsecurity3        providedRuntime  org springframework boot spring-boot-starter-tomcat       testCompile  org springframework boot spring-boot-starter-test        compile  org webjars jquery 2 1 4      compile  org webjars bootstrap 3 3 4      Here is the full stack trace  Exception in thread  main  java lang NoClassDefFoundError  javax servlet Filter     at java lang ClassLoader defineClass1 Native Method      at java lang ClassLoader defineClass ClassLoader java 800      at java security SecureClassLoader defineClass SecureClassLoader java 142      at java net URLClassLoader defineClass URLClassLoader java 449      at java net URLClassLoader access 100 URLClassLoader java 71      at java net URLClassLoader 1 run URLClassLoader java 361      at java net URLClassLoader 1 run URLClassLoader java 355      at java security AccessController doPrivileged Native Method      at java net URLClassLoader findClass URLClassLoader java 354      at java lang ClassLoader loadClass ClassLoader java 425      at sun misc Launcher AppClassLoader loadClass Launcher java 308      at java lang ClassLoader loadClass ClassLoader java 358      at java lang ClassLoader defineClass1 Native Method      at java lang ClassLoader defineClass ClassLoader java 800      at java security SecureClassLoader defineClass SecureClassLoader java 142      at java net URLClassLoader defineClass URLClassLoader java 449      at java net URLClassLoader access 100 URLClassLoader java 71      at java net URLClassLoader 1 run URLClassLoader java 361      at java net URLClassLoader 1 run URLClassLoader java 355      at java security AccessController doPrivileged Native Method      at java net URLClassLoader findClass URLClassLoader java 354      at java lang ClassLoader loadClass ClassLoader java 425      at sun misc Launcher AppClassLoader loadClass Launcher java 308      at java lang ClassLoader loadClass ClassLoader java 358      at java lang Class getDeclaredMethods0 Native Method      at java lang Class privateGetDeclaredMethods Class java 2570      at java lang Class getMethod0 Class java 2813      at java lang Class getMethod Class java 1663      at com intellij rt execution application AppMain main AppMain java 125  Caused by  java lang ClassNotFoundException  javax servlet Filter     at java net URLClassLoader 1 run URLClassLoader java 366      at java net URLClassLoader 1 run URLClassLoader java 355      at java security AccessController doPrivileged Native Method      at java net URLClassLoader findClass URLClassLoader java 354      at java lang ClassLoader loadClass ClassLoader java 425      at sun misc Launcher AppClassLoader loadClass Launcher java 308      at java lang ClassLoader loadClass ClassLoader java 358          29 more  Process finished with exit code 1

User · Answer

providedRuntime  org springframework boot spring-boot-starter-tomcat     This should be   compile  org springframework boot spring-boot-starter-tomcat

User · Answer

That looks like you tried to add the libraries servlet jar or servlet-api jar into your project  lib  folder  but Tomcat already should provide you with those libraries  Remove them from your project and classpath  Search for that anywhere in your project or classpath and remove it

User · Answer

Add the following dependency  The scope should be compile then it will work    lt dependency gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-tomcat lt  artifactId gt       lt scope gt compile lt  scope gt    lt  dependency gt

User · Answer

for the maven users  comment the scope provided in the following dependency        lt dependency gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-tomcat lt  artifactId gt           lt  -- lt scope gt provided lt  scope gt -- gt       lt  dependency gt    UPDATE  As feed me mentioned you have to uncomment the provided part depending on what kind of app you are deploying   Here is a useful link with the details   http   docs spring io spring-boot docs current reference htmlsingle  build-tool-plugins-maven-packaging

User · Answer

The configuration here is working for me   configurations       customProvidedRuntime    dependencies       compile             Spring Boot dependencies            customProvidedRuntime  org springframework boot spring-boot-starter-tomcat      war       classpath   files configurations runtime minus configurations customProvidedRuntime      springBoot       providedConfiguration    customProvidedRuntime

User · Answer

It s not good to change the scope of your application dependencies  Putting the dependency as compile  will provide the dependency also in your artifact that will be installed somewere  The best think to do is configure the RUN configuration of your sping boot application by specifying as stated in documentation         Include dependencies with  Provided  scope   Enable this option to   add dependencies with the Provided scope to the runtime classpath

User · Answer

It s interesting things with IDE  IntelliJ in this case    if you leave default  i e  don t declare spring-boot-starter-tomcat as provided  a spring-boot-maven-plugin  SBMP  put tomcat s jars to your war - gt  and you ll probably get errors deploying this war to container  there could be a versions conflict   else you ll get classpath with no compile dependency on tomcat-embed  SBMP will build executable war jar with provided deps included anyway     intelliJ honestly doesn t see provided deps at runtime  they are not in classpath  when you run its Spring Boot run configuration      and with no tomcat-embed you can t run Spring-Boot with embedded servlet container     There is some tricky workaround  put Tomcat s jars to classpath of your idea-module via UI  File- gt Project Structure- gt  Libraries or Modules Dependencies tab     tomcat-embed-core tomcat-embed-el tomcat-embed-websocket tomcat-embed-logging-juli  Better solution for maven case Instead of adding module dependencies in Idea  it is better to declare maven profile with compile scope of spring-boot-starter-tomcat library   lt profiles gt       lt profile gt           lt id gt embed-tomcat lt  id gt           lt dependencies gt               lt dependency gt                   lt groupId gt org springframework boot lt  groupId gt                   lt artifactId gt spring-boot-starter-tomcat lt  artifactId gt                   lt scope gt compile lt  scope gt               lt  dependency gt           lt  dependencies gt       lt  profile gt   lt  profiles gt   while spring-boot-starter-tomcat was declared provided in  lt dependencies  gt   making this profile active in IDE or CLI  mvn -Pembed-tomcat      allow you to launch build with embedded tomcat

User · Answer

For Jar Add pom xml  lt dependency gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-web lt  artifactId gt       lt  dependency gt

[spring-boot] Spring Boot java.lang.NoClassDefFoundError: javax/servlet/Filter

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