如何修复 Hadoop 警告:在 Ubuntu 上发生了非法反射访问操作错误 [英] How to fix Hadoop WARNING: An illegal reflective access operation has occurred error on Ubuntu

问题描述

我已经成功安装了 Java openjdk version "10.0.2" 和 Hadoop 2.9.0.所有进程都运行良好

I have installed Java openjdk version "10.0.2"and Hadoop 2.9.0 successfully. All processes are running well

hadoopusr@amalendu:~$ jps
19888 NameNode
20388 DataNode
20898 NodeManager
20343 SecondaryNameNode
20539 ResourceManager
21118 Jps

但是当我尝试执行任何命令时，例如 hdfs dfs -ls/ 收到此警告

But when ever i am trying to execute any command like hdfs dfs -ls / getting this warnings

hadoopusr@amalendu:~$ hdfs dfs -ls /
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.apache.hadoop.security.authentication.util.KerberosUtil (file:/usr/local/hadoop/share/hadoop/common/lib/hadoop-auth-2.9.0.jar) to method sun.security.krb5.Config.getInstance()
WARNING: Please consider reporting this to the maintainers of org.apache.hadoop.security.authentication.util.KerberosUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
18/09/04 00:29:24 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

请帮忙解决这个问题.这是我的 ~/.bashrc 文件配置

Please help how to fix this. This is my ~/.bashrc file configuration

export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64
export HADOOP_HOME=/usr/local/hadoop
export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$HADOOP_HOME/sbin
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export YARN_HOME=$HADOOP_HOME
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib"

推荐答案

此问题已通过 Hadoop 3.3 和 3.2.2 修复.https://issues.apache.org/jira/browse/HADOOP-10848

This has been fixed in Hadoop 3.3 and 3.2.2 via. https://issues.apache.org/jira/browse/HADOOP-10848

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