[HADOOP-18192] Fix multiple_bindings warning about slf4j-reload4j

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.2.4
• Labels: pull-request-available
• Target Version/s: 3.2.4
• Hadoop Flags: Reviewed
• Assignee: Masatake Iwasaki
• Reporter: Masatake Iwasaki
• Created: 04/Apr/22 12:54
• Updated: 06/Apr/22 23:46
• Resolved: 06/Apr/22 05:17

Description

Jar of slf4j-relad4j exists in libdirs of both common and hdfs.

$ ~/dist/hadoop-3.2.4-SNAPSHOT/bin/hdfs dfs -ls /
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/ext/dist/hadoop-3.2.4-SNAPSHOT/share/hadoop/common/lib/slf4j-reload4j-1.7.35.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/ext/dist/hadoop-3.2.4-SNAPSHOT/share/hadoop/hdfs/lib/slf4j-reload4j-1.7.35.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Reload4jLoggerFactory]


$ find ~/dist/hadoop-3.2.4-SNAPSHOT/ -name 'slf4j-reload4j-*.jar'
/home/centos/dist/hadoop-3.2.4-SNAPSHOT/share/hadoop/common/lib/slf4j-reload4j-1.7.35.jar
/home/centos/dist/hadoop-3.2.4-SNAPSHOT/share/hadoop/hdfs/lib/slf4j-reload4j-1.7.35.jar

Issue Links

• is caused by: HADOOP-18088 Replace log4j 1.x with reload4j
• links to: GitHub Pull Request #4136