保证Hadoop安全的最有效方法是对cluster进行隔离(isolation,常用方法是把大集群划分若干个小集群). Hadoop安全措施的目的是防止好的人不小心做了坏的事,而非防止坏人坏事. Kerberos: Hadoop采用Kerberos对所有的RPCs进行用户验证.Kerberos并不是Hadoop的一部分. Kerberos工作原理: Client是一个Hadoop client端,比如HDFS shell. Service是Kerberos要保护的Service,比如HDFS.…

报错过程: 进入sqoop2之后, 输入命令:show connector,报错 报错现象: Exception has occurred during processing command Exception: java.lang.NoSuchMethodError Message: org.apache.hadoop.security.authentication.client.Authenticator.setConnectionConfigurator(Lorg/apache/hadoo…

换了个环境,出现此异常 016-10-18 23:54:01,334 WARN [org.apache.hadoop.util.NativeCodeLoader] - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 2016-10-18 23:54:01,668 INFO [org.apache.hadoop.conf.Configurati…

异常: org.apache.hadoop.security.AccessControlException: Permission denied: user=root, access=WRITE, inode="/user":hdfs:supergroup:drwxr-xr-x at org.apache.hadoop.hdfs.server.namenode.DefaultAuthorizationProvider.checkFsPermission(DefaultAuthoriza…

org.apache.hadoop.security.AccessControlException: Permission denied: user=xxj, access=WRITE, inode="user":hadoop:supergroup:rwxr-xr-x sulution:added this entry to conf/hdfs-site.xml <property><name>dfs.permissions</name><va…

Hadoop Security Authentication Terminology --Kerberos What is kinit? Kinit -  obtain and cache Kerberos ticket-grantingticket If you use the kinit commandto get your tickets, make sure you use the kdestroy command to destroy yourtickets before you en…

用windows连接hadoop集群执行mapreduce任务的时候出现以下错误: org.apache.hadoop.security.AccessControlException:Permission denied: user=Administrator, access=WRITE,inode="/output":hadoop:supergroup:drwxr-xr-x Causedby:org.apache.hadoop.ipc.RemoteException(org.apach…

今天使用JDBC来操作Hive时,首先启动了hive远程服务模式:hiveserver2 &(表示后台运行),然后到eclipse中运行程序时出现错误: java.sql.SQLException: Could not open client transport with JDBC Uri: jdbc:hive2://192.168.182.11:10000/default: Failed to open new session: java.lang.RuntimeException: org.…

1:初学hadoop遇到各种错误,这里贴一下,方便以后脑补吧,报错如下: 主要是在window环境下面搞hadoop,而hadoop部署在linux操作系统上面:出现这个错误是权限的问题,操作hadoop是虚拟机的主机用户不是window的主机用户Administrator,所以出现下面的错误,解决办法如下所示(或者修改文件的权限,即所有者都可以进行可读,可写,可执行): log4j:WARN No appenders could be found for logger (org.apache.…

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 htt…