[atguigu@node11 hbase]$ bin/start-hbase.sh SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/opt/module/hadoop-3.1.3/share/hadoop/common/lib/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/usr/local/hbase/lib/client-facing-thirdparty/slf4j-log4j12-1.7.30.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] SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/opt/module/hadoop-3.1.3/share/hadoop/common/lib/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/usr/local/hbase/lib/client-facing-thirdparty/slf4j-log4j12-1.7.30.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] The authenticity of host '127.0.0.1 (127.0.0.1)' can't be established. ECDSA key fingerprint is 5b:fb:73:67:71:a6:c0:1a:76:23:06:7f:a0:ac:04:32. Are you sure you want to continue connecting (yes/no)? yes 127.0.0.1: Warning: Permanently added '127.0.0.1' (ECDSA) to the list of known hosts. 127.0.0.1: running zookeeper, logging to /usr/local/hbase/bin/../logs/hbase-atguigu-zookeeper-node11.out 127.0.0.1: SLF4J: Class path contains multiple SLF4J bindings. 127.0.0.1: SLF4J: Found binding in [jar:file:/opt/module/hadoop-3.1.3/share/hadoop/common/lib/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class] 127.0.0.1: SLF4J: Found binding in [jar:file:/usr/local/hbase/lib/client-facing-thirdparty/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class] 127.0.0.1: SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. 127.0.0.1: SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory] running master, logging to /usr/local/hbase/bin/../logs/hbase-atguigu-master-node11.out : running regionserver, logging to /usr/local/hbase/bin/../logs/hbase-atguigu-regionserver-node11.out怎么办呢

这个输出信息是启动 HBase 的过程中出现的，其中有多个 SLF4J 绑定的警告信息，这是由于 HBase 和 Hadoop 都依赖了 SLF4J，并且使用了不同版本的 jar 包导致的。这个警告信息可以忽略，不会影响 HBase 的正常使用。如果你想要解决这个警告信息，可以尝试将 Hadoop 和 HBase 使用的 SLF4J 版本统一。另外，最后一行的输出信息表明 HBase 启动成功，可以正常使用。

相关问题

[atguigu@node11 hbase]$ bin/start-hbase.sh SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/opt/module/hadoop-3.1.3/share/hadoop/common/lib/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/usr/local/hbase/lib/client-facing-thirdparty/slf4j-log4j12-1.7.30.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] running master, logging to /usr/local/hbase/bin/../logs/hbase-atguigu-master-node11.out SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/opt/module/hadoop-3.1.3/share/hadoop/common/lib/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/usr/local/hbase/lib/client-facing-thirdparty/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation

这是一个启动HBase的Shell脚本，在启动的过程中出现了SLF4J绑定的问题。具体的错误信息是Class path contains multiple SLF4J bindings，意思是类路径中包含了多个SLF4J绑定。在这个错误信息中，SLF4J发现了两个绑定，一个在/opt/module/hadoop-3.1.3/share/hadoop/common/lib/slf4j-log4j12-1.7.25.jar中，另一个在/usr/local/hbase/lib/client-facing-thirdparty/slf4j-log4j12-1.7.30.jar中。SLF4J提供了一个链接http://www.slf4j.org/codes.html#multiple_bindings来解释这个问题。最后，该错误信息指出实际的绑定类型是org.slf4j.impl.Log4jLoggerFactory。

[atguigu@node11 hbase]$ ./bin/start-hbase.sh SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/opt/module/hadoop-3.1.3/share/hadoop/common/lib/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/usr/local/hbase/lib/client-facing-thirdparty/slf4j-log4j12-1.7.30.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] running master, logging to /usr/local/hbase/bin/../logs/hbase-atguigu-master-node11.out SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/opt/module/hadoop-3.1.3/share/hadoop/common/lib/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/usr/local/hbase/lib/client-facing-thirdparty/slf4j-log4j12-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation怎么办

这个问题是因为在类路径（classpath）中出现了多个SLF4J绑定的原因。可以尝试以下解决方案：

1. 在`$HBASE_HOME/conf/hbase-env.sh`中添加以下代码：

   export HBASE_OPTS="$HBASE_OPTS -Dorg.slf4j.simpleLogger.showMultipleLoggers=true"

这样可以在启动时查看具体的多绑定信息。

2. 在`$HBASE_HOME/conf/log4j.properties`中添加以下代码：

   # Remove duplicate SLF4J bindings
   log4j.logger.org.apache.hadoop.metrics2=ERROR,console

这样可以将日志级别调整为ERROR，从而隐藏多绑定的警告信息。

3. 如果以上两种方法均未解决问题，可以考虑移除多余的SLF4J绑定。具体方法是在HBase的类路径中只保留一个SLF4J绑定的jar包，删除其他的绑定jar包。