Hadoop问题：start-dfs.sh启动HDFS时，警告：SLF4J: Class path contains multiple SLF4J bindings.

[hadoop@node1 ~]$ start-dfs.sh
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/opt/bigdata/hadoop-2.7.3/share/hadoop/common/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/opt/bigdata/hbase-1.2.1/lib/slf4j-log4j12-1.7.5.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.Log4jLoggerFactory]
Starting namenodes on [node1]
node1: starting namenode, logging to /opt/bigdata/hadoop-2.7.3/logs/hadoop-hadoop-namenode-node1.out
node3: starting datanode, logging to /opt/bigdata/hadoop-2.7.3/logs/hadoop-hadoop-datanode-node3.out
node2: starting datanode, logging to /opt/bigdata/hadoop-2.7.3/logs/hadoop-hadoop-datanode-node2.out
node1: starting datanode, logging to /opt/bigdata/hadoop-2.7.3/logs/hadoop-hadoop-datanode-node1.out
Starting secondary namenodes [0.0.0.0]
0.0.0.0: starting secondarynamenode, logging to /opt/bigdata/hadoop-2.7.3/logs/hadoop-hadoop-secondarynamenode-node1.out
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/opt/bigdata/hadoop-2.7.3/share/hadoop/common/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/opt/bigdata/hbase-1.2.1/lib/slf4j-log4j12-1.7.5.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.Log4jLoggerFactory]

解决办法 从其中的一个路径移除相关的jar包。