[MAHOUT-1118] SLF4J Log4j bindings are messed up causing examples to fail

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.7
• Fix Version/s: 0.8
• Assignee: Grant Ingersoll
• Reporter: Grant Ingersoll
• Created: 18/Nov/12 13:13
• Updated: 03/Feb/14 08:06
• Resolved: 19/Nov/12 13:34

Description

We are routinely seeing the following failures when running the examples on Jenkins and they are due to old SLF4j bindings on Cassandra and HBase:

Training on /tmp/mahout-work-jenkins/20news-bydate/20news-bydate-train/
hadoop binary is not in PATH,HADOOP_HOME/bin,HADOOP_PREFIX/bin, running locally
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/x1/jenkins/jenkins-slave/workspace/Mahout-Examples-Classify-20News/trunk/examples/target/mahout-examples-0.8-SNAPSHOT-job.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/x1/jenkins/jenkins-slave/workspace/Mahout-Examples-Classify-20News/trunk/examples/target/dependency/slf4j-jcl-1.7.2.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/x1/jenkins/jenkins-slave/workspace/Mahout-Examples-Classify-20News/trunk/examples/target/dependency/slf4j-log4j12-1.4.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: slf4j-api 1.6.x (or later) is incompatible with this binding.
SLF4J: Your binding is version 1.5.5 or earlier.
SLF4J: Upgrade your binding to version 1.6.x.
Exception in thread "main" java.lang.NoSuchMethodError: org.slf4j.impl.StaticLoggerBinder.getSingleton()Lorg/slf4j/impl/StaticLoggerBinder;
	at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128)
	at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:107)
	at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:295)
	at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:269)
	at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:281)
	at org.apache.mahout.driver.MahoutDriver.<clinit>(MahoutDriver.java:89)
Could not find the main class: org.apache.mahout.driver.MahoutDriver.  Program will exit.
Build step 'Execute shell' marked build as failure
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Issue Links

• is duplicated by: MAHOUT-1099 Multiple slf4j bindings
• is related to: MAHOUT-1111 Logging bindings not working in current trunk as of github 2012-November-9 18:41
• relates to: MAHOUT-1399 Silence logging noise from Mahout Jobs