SLF4J Failed to load class org slf4j impl StaticLoggerBinder error

Question

Regarding Eclipse IDE  Indigo  Juno and Kepler  32 and 64 bit versions   Platforms  Windows  Ubuntu  Mac m2e version  1 1 0 20120530-0009  1 2 0 20120903-1050  1 3 0 20130129-0926  1 4 0 20130601-0317      General info  The above error came after updating the m2e to version 1 1  By removing m2e 1 1 and rolling back to m2e 1 0 everything worked fine  I tried to repeat the problem in Windows and Ubuntu and it gave me the exact same error  Numerous configurations of the slf4j-api and logback were tested but none seem to work    The error appears in any maven project even without declaring slf4j dependency     New Maven Project--  maven-archetype-quickstart   and  New Maven Project--  Simple project without archetype selection   result to      SLF4J  Failed to load class  org slf4j impl StaticLoggerBinder       Testing enviroments and configurations  Tested with Eclipse Indigo and Eclipse Juno  32 and 64 bit both  on Mac  32 bit on Ubuntu and 64 and 32 bit on Windows  Tested fresh installs of Juno Classic  Juno Modelling tools  Kepler Standard  Kepler Modelling Tools and produced the same error    The error appears with clean  install  test  deploy  generate-sources  validate   compile   package  integration-test  verify and combinations of the goal clean with the rest goals  It appears also with parameters -e and -X  There was an attempt to delete the m2e repository and download it from scratch but again without success  It should me mentioned that it was tested in 3 different machines and virtual box all the above systems but it produced the same error    Tried all different logback configurations  from 1 0 4 to 1 0 13  that resolve the slf4j-api and logback-core dependencies  but all produce the same error    lt dependency gt      lt groupId gt ch qos logback lt  groupId gt      lt artifactId gt logback-classic lt  artifactId gt      lt version gt  lt  version gt   lt  dependency gt    Tried all different  from 1 6 1 to 1 7 5   slf4j-simple configurations    lt dependency gt      lt groupId gt org slf4j lt  groupId gt      lt artifactId gt slf4j-simple lt  artifactId gt      lt version gt  lt  version gt      lt scope gt compile lt  scope gt   lt  dependency gt    Tried all different  from 1 6 1 to 1 7 5   log4j-over-slf4j configurations    lt dependency gt      lt groupId gt org slf4j lt  groupId gt      lt artifactId gt log4j-over-slf4j lt  artifactId gt      lt version gt  lt  version gt      lt scope gt compile lt  scope gt   lt  dependency gt    Tried all different  from 1 6 1 to 1 7 5   slf4j-jdk14 configurations    lt dependency gt      lt groupId gt org slf4j lt  groupId gt      lt artifactId gt slf4j-jdk14 lt  artifactId gt      lt version gt  lt  version gt      lt scope gt compile lt  scope gt   lt  dependency gt    Tried all different  from 1 6 1 to 1 7 5   slf4j-log4j12 configurations    lt dependency gt        lt groupId gt org slf4j lt  groupId gt        lt artifactId gt slf4j-log4j12 lt  artifactId gt        lt version gt  lt  version gt        lt scope gt compile lt  scope gt   lt  dependency gt    Tried slf4j-nop 1 7 5 configuration    lt dependency gt     lt groupId gt org slf4j lt  groupId gt     lt artifactId gt slf4j-nop lt  artifactId gt     lt version gt 1 7 5 lt  version gt     lt scope gt compile lt  scope gt   lt  dependency gt    Last but not least the logs are saved and printed despite the error     Ways to reproduce the error   Download Eclipse Juno  Indigo or Kepler 32 or 64 bit  All installations will cause the same error      Install m2e - Maven Integration for Eclipse   Juno - http   download eclipse org releases juno Kepler - http   download eclipse org releases kepler Indigo - http   download eclipse org technology m2e releases   currently unavailable    OR Update your m2e version to 1 1 0 20120530-0009  or 1 2 0 20120903-1050  or 1 3 0 20130129-0926  or 1 4 0 20130601-0317     Select File- New- Other- Maven Project- Click Next- Select maven-archetype-quickstart from the catalog- Finish  OR Select File- New- Other- Maven Project- Click Next- Select Create a simple project  skip archetype selection -  Complete Artifact info-  Finish  Right Click on the project- Runs As- clean install  or any other goal mentioned above    The first line on the console will be   SLF4J  Failed to load class  org slf4j impl StaticLoggerBinder   SLF4J  Defaulting to no-operation  NOP  logger implementation SLF4J  See http   www slf4j org codes html StaticLoggerBinder for further details    P S  Existing projects will produce the same error after updating the m2e version to 1 1 0 20120530-0009  1 2 0 20120903-1050  1 3 0 20130129-0926  1 4 0 20130601-0317    Updates  EDIT  m2e support site     The above question was posted as a bug in m2e support site and the answer from Igor Fedorenko was that     There are no immediate plans to suppress this message    For viewing the above bug please refer to m2e official support site    EDIT 2   The above error indication is present also to m2e version 1 2 0 20120903-1050    EDIT 3   The above error indication is present also to m2e version 1 3 0 20130129-0926    EDIT 4   The above error indication is present also to m2e version 1 4 0 20130601-0317    EDIT 5                                   Reported FIXED       The above error is reported as fixed for m2e version 1 5 0 Luna M3 Target Milestone   The version is not yet available for download   Luna M3 is scheduled for Nov  15th   Latest dev build are available here     More information about the m2e milestones you can find at the m2e main repository

User · Accepted Answer

I can also confirm this error  Workaround  is to use external maven inside m2eclipse  instead of it s embedded maven  That is done in three steps  1  Install maven on local machine  the test-machine was Ubuntu 10 10   mvn --version Apache Maven 2 2 1  rdebian-4  Java version  1 6 0 20 Java home   usr lib jvm java-6-openjdk jre Default locale  de DE  platform encoding  UTF-8 OS name   quot linux quot  version   quot 2 6 35-32-generic quot  arch   quot amd64 quot  Family   quot unix quot   2 Run maven externally  link how to run maven from console   gt  cd path-to-pom xml  gt  mvn test        INFO  Scanning for projects         INFO  ------------------------------------------------------------------------      INFO  Building Simple      INFO     task-segment   test       INFO  ------------------------------------------------------------------------                INFO  Surefire report directory        workspace Simple target surefire-reports          -------------------------------------------------------      T E S T S     -------------------------------------------------------     Running net tverrbjelke experiment MainAppTest     Hello World     Tests run  1  Failures  0  Errors  0  Skipped  0  Time elapsed  0 042 sec          Results            Tests run  1  Failures  0  Errors  0  Skipped  0           INFO  ------------------------------------------------------------------------      INFO  BUILD SUCCESSFUL      INFO  ------------------------------------------------------------------------            3 inside m2eclipse  switch from embedded maven to local maven  find out where local maven home installation dir is  mvn --version  or google for your MAVEN HOME  for me this helped me that is  usr share maven2   in eclipse Menu- gt Window- gt Preferences- gt Maven- gt Installation- gt  enter that string  Then you should have switched to your new external maven  then run your Project as e g   quot maven test quot    The error-message should be gone

User · Answer

If you are using Gradle add this   dependencies         compile  org slf4j slf4j-simple 1 7 9

User · Answer

I had the similar issue for my Spring Boot - Gradle application running on Eclipse Luna  I could resolve it by manually adding an entry in my project s  classpath   lt classpathentry sourcepath  C  Users  lt username gt   gradle caches modules-2 files-2 1 org slf4j slf4j-simple 1 7 7 3150039466ad03e6ef1c7ec1c2cbb0d96710cf64 slf4j-simple-1 7 7-sources jar  kind  lib  path  C  Users  lt username gt   gradle caches modules-2 files-2 1 org slf4j slf4j-simple 1 7 7 8095d0b9f7e0a9cd79a663c740e0f8fb31d0e2c8 slf4j-simple-1 7 7 jar   gt    Idea is to follow this solution  But how to implement is dependent on case to case  One way of fixing is the one that I used above   Hope this helps

User · Answer

Paste this code to your pom xml file  It works for me    lt dependency gt       lt groupId gt org slf4j lt  groupId gt       lt artifactId gt slf4j-simple lt  artifactId gt       lt version gt 1 6 1 lt  version gt       lt scope gt test lt  scope gt   lt  dependency gt

User · Answer

There is a documentation in SLf4J site to resolve this  I followed that and added slf4j-simple-1 6 1 jar to my aplication along with slf4j-api-1 6 1 jar which i already had This solved my problem  slf4j

User · Answer

You haven t specify version in your maven dependency file may be thats why it is not picking the latest jarAs well as you need another deppendency with slf4j-log4j12 artifact id Include this in your pom file   lt dependency gt       lt groupId gt org slf4j lt  groupId gt       lt artifactId gt slf4j-log4j12 lt  artifactId gt       lt version gt 1 5 6 lt  version gt   lt  dependency gt    Let me know if error is still not resolved I also recomend you to see this link

User · Answer

Had similar error with the same result with Gradle and was able to solve it by following     compile  org slf4j slf4j-api 1 7 1  compile group   org apache logging log4j   name   log4j-api   version   2 1  compile group   org apache logging log4j   name   log4j-core   version   2 1  compile group   org apache logging log4j   name   log4j-slf4j-impl   version   2 1    Out-commented line is the one which caused the error output  I believe you can transfer this to Maven

User · Answer

This is not an error message but a warning   It is very clearly explained in their website as    This warning  i e  not an error  message is reported when no SLF4J providers could be found on the class path  Placing one  and only one  of slf4j-nop jar slf4j-simple jar  slf4j-log4j12 jar  slf4j-jdk14 jar or logback-classic jar on the class path should solve the problem  Note that these providers must target slf4j-api 1 8 or later   In the absence of a provider  SLF4J will default to a no-operation  NOP  logger provider   https   www slf4j org codes html StaticLoggerBinder

User · Answer

Had been over looking the issue having surfaced it  Believe this will be a good read for others who come down here with the same issue   https   bugs eclipse org bugs show bug cgi id 387064

User · Answer

I had the same problem in writing the Kafka producer program using java  This error is coming due to the wrong slf4j library  use below slf4j-simple maven dependency that will fix your problem     lt dependency gt       lt groupId gt org slf4j lt  groupId gt       lt artifactId gt slf4j-simple lt  artifactId gt       lt version gt 1 6 1 lt  version gt       lt scope gt test lt  scope gt   lt  dependency gt

[eclipse] SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". error

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