SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/opt/apache-hive-2.3.5/lib/log4j-slf4j-impl-2.6.2.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/opt/hadoop-3.3.1/share/hadoop/common/lib/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.apache.logging.slf4j.Log4jLoggerFactory] Exception in thread "main" java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap') at org.apache.hadoop.hive.ql.session.SessionState.<init>(SessionState.java:394) at org.apache.hadoop.hive.ql.session.SessionState.<init>(SessionState.java:370) at org.apache.hadoop.hive.cli.CliSessionState.<init>(CliSessionState.java:60) at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:708) at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:686) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.apache.hadoop.util.RunJar.run(RunJar.java:323) at org.apache.hadoop.util.RunJar.main(RunJar.java:236)

这段信息是关于 SLF4J（Simple Logging Facade for Java）的警告，它通知你的程序中存在多个 SLF4J 日志绑定，这可能会导致不可预期的日志行为。在这里，SLF4J 绑定分别在 `/opt/apache-hive-2.3.5/lib/log4j-slf4j-impl-2.6.2.jar` 和 `/opt/hadoop-3.3.1/share/hadoop/common/lib/slf4j-log4j12-1.7.30.jar` 中找到。警告中提供了一个链接，解释了多个绑定的原因以及如何解决这个问题。

接下来，这段信息指出了一个类转换异常，这个异常通常发生在 Java 反射机制中。在这里，程序尝试将 AppClassLoader 类型的对象转换成 URLClassLoader 类型的对象，但这两个类并没有继承关系，因此出现了该异常。这个异常的出现可能是由于您的代码中存在某些错误或者是不当的配置导致的。如果您需要更详细的帮助，请提供更多的上下文信息，我会尽力提供帮助。

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。