java.lang.ClassNotFoundException: org.apache.log4j.Level Exception

Question

I have met with the following exception and it's the first time I came across with this one:

Caused by: java.lang.NoClassDefFoundError: org/apache/log4j/Level
    at org.apache.hadoop.mapred.JobConf.<clinit>(JobConf.java:357) ~[hadoop-mapreduce-client-core-2.7.1.jar:na]
    at java.lang.Class.forName0(Native Method) ~[na:1.8.0_91]
    at java.lang.Class.forName(Class.java:348) ~[na:1.8.0_91]
    at org.apache.hadoop.conf.Configuration.getClassByNameOrNull(Configuration.java:2134) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:95) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:78) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:136) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.security.Groups.<init>(Groups.java:79) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.security.Groups.<init>(Groups.java:74) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.security.Groups.getUserToGroupsMappingService(Groups.java:303) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:283) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:260) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.security.UserGroupInformation.loginUserFromSubject(UserGroupInformation.java:790) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:760) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:633) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.fs.FileSystem$Cache$Key.<init>(FileSystem.java:2812) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.fs.FileSystem$Cache$Key.<init>(FileSystem.java:2802) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2668) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:371) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:170) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:355) ~[hadoop-common-2.7.1.jar:na]
    at org.apache.hadoop.fs.Path.getFileSystem(Path.java:295) ~[hadoop-common-2.7.1.jar:na]
    at org.springframework.data.hadoop.store.support.OutputStoreObjectSupport.findInitFiles(OutputStoreObjectSupport.java:110) ~[spring-data-hadoop-store-2.3.0.RELEASE.jar:2.3.0.RELEASE]
    at org.springframework.data.hadoop.store.support.OutputStoreObjectSupport.initOutputContext(OutputStoreObjectSupport.java:93) ~[spring-data-hadoop-store-2.3.0.RELEASE.jar:2.3.0.RELEASE]
    at org.springframework.data.hadoop.store.support.OutputStoreObjectSupport.onInit(OutputStoreObjectSupport.java:83) ~[spring-data-hadoop-store-2.3.0.RELEASE.jar:2.3.0.RELEASE]
    at org.springframework.data.hadoop.store.support.LifecycleObjectSupport.afterPropertiesSet(LifecycleObjectSupport.java:67) ~[spring-data-hadoop-store-2.3.0.RELEASE.jar:2.3.0.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    ... 66 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Level
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_91]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_91]
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_91]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_91]
    ... 94 common frames omitted

I have tried this. But it doesn't solves the problem. Also looked at here and it too disappointed.

Any help will be appreciated.

at it seems to be a maven project, what is the result of mvn dependency:tree ? — Nicolas Filotto
– Nicolas Filotto, Commented Sep 3, 2016 at 11:36

Moshe Arad · Accepted Answer · 2016-09-04 15:49:43Z

2

It seems that the class:

org.apache.log4j.Level

can't be found in your classpath. First, make sure that Log4j dependency is in your local repository, i.e. in your .m2 folder, if it's not there, execute on your command-line:

mvn dependency:copy-dependencies

That Maven command will pull down your requested dependencies which aren't found in your local repository.

answered Sep 4, 2016 at 15:49

Moshe Arad

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Abhishek Ramachandran · Accepted Answer · 2016-09-05 10:32:39Z

2

I just solved this issue. It's all because of a wrong code placed in build.gradle as

configurations.all {
    exclude group: "commons-logging", module: "commons-logging"
    exclude group: "log4j", module: "log4j"
 }

Removed this and problem solved.

answered Sep 5, 2016 at 10:32

Abhishek Ramachandran

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