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https://issues.apache.org/jira/browse/YARN-2875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14292529#comment-14292529
 ] 

Steve Loughran commented on YARN-2875:
--------------------------------------

tim, add a patch in  HADOOP-11317  to increment the SLF4J version and I'll 
apply it

> Bump SLF4J to 1.7.7 from 1.7.5 
> -------------------------------
>
>                 Key: YARN-2875
>                 URL: https://issues.apache.org/jira/browse/YARN-2875
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Tim Robertson
>            Priority: Minor
>
> hadoop-yarn-common [uses log4j 
> directly|https://github.com/apache/hadoop/blob/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/pom.xml#L167]
>  and when trying to redirect that through an SLF4J bridge version 1.7.5 has 
> issues, due to use of AppenderSkeleton which is missing in log4j-over-slf4j 
> version 1.7.5.
> This is documented on the [1.7.6 release 
> notes|http://www.slf4j.org/news.html] but 1.7.7 should be suitable.
> This is applicable to all the projects using Hadoop motherpom, but Yarn 
> appears to be bringing Log4J in, rather than coding to the SLF4J API.
> The issue shows in the logs as follows in Yarn MR apps, which is painful to 
> diagnose.
> {code}
> WARN  [2014-11-18 09:58:06,390+0100] [main] 
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Caught exception in 
> callback postStart
> java.lang.reflect.InvocationTargetException: null
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
> ~[na:1.7.0_71]
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
> ~[na:1.7.0_71]
>       at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>  ~[na:1.7.0_71]
>       at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_71]
>       at 
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl$3.invoke(MetricsSystemImpl.java:290)
>  ~[job.jar:0.22-SNAPSHOT]
>       at com.sun.proxy.$Proxy2.postStart(Unknown Source) [na:na]
>       at 
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl.start(MetricsSystemImpl.java:185)
>  [job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl.init(MetricsSystemImpl.java:157)
>  [job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.init(DefaultMetricsSystem.java:54)
>  [job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.initialize(DefaultMetricsSystem.java:50)
>  [job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.mapreduce.v2.app.MRAppMaster.serviceStart(MRAppMaster.java:1036)
>  [job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.service.AbstractService.start(AbstractService.java:193) 
> [job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.mapreduce.v2.app.MRAppMaster$1.run(MRAppMaster.java:1478) 
> [job.jar:0.22-SNAPSHOT]
>       at java.security.AccessController.doPrivileged(Native Method) 
> [na:1.7.0_71]
>       at javax.security.auth.Subject.doAs(Subject.java:415) [na:1.7.0_71]
>       at 
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)
>  [job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.mapreduce.v2.app.MRAppMaster.initAndStartAppMaster(MRAppMaster.java:1474)
>  [job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.mapreduce.v2.app.MRAppMaster.main(MRAppMaster.java:1407) 
> [job.jar:0.22-SNAPSHOT]
> Caused by: java.lang.IncompatibleClassChangeError: Implementing class
>       at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.7.0_71]
>       at java.lang.ClassLoader.defineClass(ClassLoader.java:800) 
> ~[na:1.7.0_71]
>       at 
> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) 
> ~[na:1.7.0_71]
>       at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) 
> ~[na:1.7.0_71]
>       at java.net.URLClassLoader.access$100(URLClassLoader.java:71) 
> ~[na:1.7.0_71]
>       at java.net.URLClassLoader$1.run(URLClassLoader.java:361) ~[na:1.7.0_71]
>       at java.net.URLClassLoader$1.run(URLClassLoader.java:355) ~[na:1.7.0_71]
>       at java.security.AccessController.doPrivileged(Native Method) 
> [na:1.7.0_71]
>       at java.net.URLClassLoader.findClass(URLClassLoader.java:354) 
> ~[na:1.7.0_71]
>       at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[na:1.7.0_71]
>       at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) 
> ~[na:1.7.0_71]
>       at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[na:1.7.0_71]
>       at 
> org.apache.hadoop.metrics2.source.JvmMetrics.getEventCounters(JvmMetrics.java:183)
>  ~[job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.metrics2.source.JvmMetrics.getMetrics(JvmMetrics.java:100) 
> ~[job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMetrics(MetricsSourceAdapter.java:195)
>  ~[job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.updateJmxCache(MetricsSourceAdapter.java:172)
>  ~[job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMBeanInfo(MetricsSourceAdapter.java:151)
>  ~[job.jar:0.22-SNAPSHOT]
>       at 
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getNewMBeanClassName(DefaultMBeanServerInterceptor.java:333)
>  ~[na:1.7.0_71]
>       at 
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:319)
>  ~[na:1.7.0_71]
>       at 
> com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522) 
> ~[na:1.7.0_71]
>       at org.apache.hadoop.metrics2.util.MBeans.register(MBeans.java:57) 
> ~[job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.startMBeans(MetricsSourceAdapter.java:221)
>  ~[job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.start(MetricsSourceAdapter.java:96)
>  ~[job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl.registerSource(MetricsSystemImpl.java:245)
>  [job.jar:0.22-SNAPSHOT]
>       at 
> org.apache.hadoop.metrics2.impl.MetricsSystemImpl$1.postStart(MetricsSystemImpl.java:229)
>  ~[job.jar:0.22-SNAPSHOT]
>       ... 18 common frames omitted
> {code}



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