hadoop+hive多用户访问支持

最新推荐文章于 2024-11-09 17:03:36 发布

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#hadoop #access #mapreduce #exception #user #jobs

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本文解决了一个常见的Hive权限问题，即当用户尝试在Hadoop文件系统中写入数据时遇到拒绝访问的情况。文章详细介绍了错误信息及原因，并提供了解决方案，包括更改特定目录的权限。

在我们hadoop+hive的使用场景中，一般都是将hive部署在hadoop用户下。而如果多人需要访问的时候，只能通过hive启动server的方式来处理。

而不能通过客户端的方式来处理。

如果将hive程序部署到非hadoop用户下，会出现如下问题：

/home/songwei/hive-0.7.0-bin/bin/hive-config.sh: line 21: export: `=/home/songwei/hive-0.7.0-bin': not a valid identifier
WARNING: org.apache.hadoop.metrics.jvm.EventCounter is deprecated. Please use org.apache.hadoop.log.metrics.EventCounter in all the log4j.properties files.
Hive history file=/home/songwei/hadoop/hivelogtmp/hive_job_log_songwei_201205031407_1132278125.txt
hive> select count(1) from jipiao.ktepuser ;
Total MapReduce jobs = 1
Launching Job 1 out of 1
Number of reduce tasks determined at compile time: 1
In order to change the average load for a reducer (in bytes):
  set hive.exec.reducers.bytes.per.reducer=<number>
In order to limit the maximum number of reducers:
  set hive.exec.reducers.max=<number>
In order to set a constant number of reducers:
  set mapred.reduce.tasks=<number>
org.apache.hadoop.security.AccessControlException: org.apache.hadoop.security.AccessControlException: Permission denied: user=songwei, access=WRITE, inode="staging":hadoop:supergroup:rwxr-xr-x
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        at org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:95)
        at org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:57)
        at org.apache.hadoop.hdfs.DFSClient.mkdirs(DFSClient.java:994)
        at org.apache.hadoop.hdfs.DistributedFileSystem.mkdirs(DistributedFileSystem.java:329)
        at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:116)
        at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:797)
        at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:791)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
        at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:791)
        at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:765)
        at org.apache.hadoop.hive.ql.exec.ExecDriver.execute(ExecDriver.java:657)
        at org.apache.hadoop.hive.ql.exec.MapRedTask.execute(MapRedTask.java:123)
        at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:130)
        at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:57)
        at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1063)
        at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:900)
        at org.apache.hadoop.hive.ql.Driver.run(Driver.java:748)
        at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:164)
        at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:241)
        at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:456)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
Caused by: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.security.AccessControlException: Permission denied: user=songwei, access=WRITE, inode="staging":hadoop:supergroup:rwxr-xr-x
        at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:199)
        at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:180)
        at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:128)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkPermission(FSNamesystem.java:4811)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkAncestorAccess(FSNamesystem.java:4785)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirsInternal(FSNamesystem.java:1917)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:1886)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.mkdirs(NameNode.java:716)
        at sun.reflect.GeneratedMethodAccessor42.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:523)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1383)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1379)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1377)

        at org.apache.hadoop.ipc.Client.call(Client.java:1030)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:224)
        at $Proxy5.mkdirs(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
        at $Proxy5.mkdirs(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient.mkdirs(DFSClient.java:992)
        ... 24 more
Job Submission failed with exception 'org.apache.hadoop.security.AccessControlException(org.apache.hadoop.security.AccessControlException: Permission denied: user=songwei, access=WRITE, inode="staging":hadoop:supergroup:rwxr-xr-x)'
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.MapRedTask

如果出现如上问题：

可以执行如下操作来进行。注意，不要直接bin/hadoop dfs -chmod -R 777 /home

特定的目录是不允许777权限的。

比如：

drwxrwxrwx - hadoop supergroup 0 2012-05-23 07:25 /home/hadoop/hadoop/tmp/mapred/staging
drwx------ - hadoop supergroup 0 2012-06-25 17:53 /home/hadoop/hadoop/tmp/mapred/system

bin/hadoop dfs -chmod 777 /home
bin/hadoop dfs -chmod 777 /home/hadoop
bin/hadoop dfs -chmod 777 /home/hadoop/hadoop
bin/hadoop dfs -chmod 777 /home/hadoop/hadoop/tmp
bin/hadoop dfs -chmod 777 /home/hadoop/hadoop/tmp/mapred
bin/hadoop dfs -chmod 777 /home/hadoop/hadoop/tmp/mapred/staging
bin/hadoop dfs -chmod -R 777 /user