不多说，直接上干货！
　　我的集群机器情况是&bigdatamaster（192.168.80.10）、bigdataslave1（192.168.80.11）和bigdataslave2（192.168.80.12）
　　然后，安装目录是在/home/hadoop/app下。
　　官方建议在master机器上安装Hue，我这里也不例外。安装在bigdatamaster机器上。
　Hue版本：hue-3.9.0-cdh5.5.4
需要编译才能使用（联网）　说给大家的话：大家电脑的配置好的话，一定要安装cloudera manager。毕竟是一家人的。同时，我也亲身经历过，会有部分组件版本出现问题安装起来要个大半天时间去排除，做好心里准备。废话不多说，因为我目前读研，自己笔记本电脑最大8G，只能玩手动来练手。纯粹是为了给身边没高配且条件有限的学生党看的！ 但我已经在实验室机器群里搭建好cloudera manager 以及 ambari都有。
1、HUE中&查询有问题，页面报错：Could not connect to localhost:10000 &或者 & Could not connect to bigdatamaster:10000
解决方法：
　　在安装的HIVE中启动hiveserver2 &,因为端口号10000是hiveserver2服务的端口号，否则，Hue Web 控制无法执行HIVE 查询。
　　bigdatamaster是我机器名。
　　在$HIVE_HOME下
bin/hive -&service hiveserver2 &
[hadoop@bigdatamaster ~]$ cd $HIVE_HOME
[hadoop@bigdatamaster hive]$ bin/hive --service hiveserver2 &
　　大家，注意，以下是我的hive-site.xml里的配置信息
　　该问题，成功解决。
　 database is locked
&这应该是hue默认的SQLite数据库出现错误，你可以使用mysql postgresql等来替换
https://www.cloudera.com/documentation/enterprise/5-5-x/topics/admin_hue_ext_db.html（这是官网）
　　同时，参考（见https://my.oschina.net/aibati2008/blog/647493）
　　这篇博客：安装配置和使用hue遇到的问题汇总
# Configuration options for specifying the Desktop Database. For more info,
# see http://docs.djangoproject.com/en/1.4/ref/settings/#database-engine
# ------------------------------------------------------------------------
[[database]]
# Database engine is typically one of:
# postgresql_psycopg2, mysql, sqlite3 or oracle.
# Note that for sqlite3, 'name', below is a path to the filename. For other backends, it is the database name.
# Note for Oracle, options={"threaded":true} must be set in order to avoid crashes.
# Note for Oracle, you can use the Oracle Service Name by setting "port=0" and then "name=&host&:&port&/&service_name&".
# Note for MariaDB use the 'mysql' engine.
## engine=sqlite3
## password=
## name=desktop/desktop.db
## options={}
&　　以上是默认的。
　　hue默认使用sqlite作为元数据库，不推荐在生产环境中使用。会经常出现database is lock的问题。
解决方法：
　　其实官网也有解决方法，不过过程似乎有点问题。而且并不适合3.7之后的版本。我现在使用的是3.11，以下是总结的最快的切换方法。
[root@bigdatamaster hadoop]# mysql -uhive -phive
Welcome to the MySQL monitor.
Your MySQL connection id is 49
Server version: 5.1.73 Source distribution
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
Type '' or '\h' for help. Type '\c' to clear the current input statement.
+--------------------+
| Database
+--------------------+
| information_schema |
+--------------------+
5 rows in set (0.07 sec)
　　因为，我这里是，用户为hive，密码也为hive，然后，数据库也为hive，所以如下：
# Configuration options for specifying the Desktop Database. For more info,
# see http://docs.djangoproject.com/en/1.4/ref/settings/#database-engine
# ------------------------------------------------------------------------
[[database]]
# Database engine is typically one of:
# postgresql_psycopg2, mysql, sqlite3 or oracle.
# Note that for sqlite3, 'name', below is a path to the filename. For other backends, it is the database name.
# Note for Oracle, options={"threaded":true} must be set in order to avoid crashes.
# Note for Oracle, you can use the Oracle Service Name by setting "port=0" and then "name=&host&:&port&/&service_name&".
# Note for MariaDB use the 'mysql' engine.
engine=mysql
host=bigdatamaster
password=hive
## options={}
&　　然后，重启hue进程
[hadoop@bigdatamaster hue]$ build/env/bin/supervisor
　　&完成以上的这个配置，启动Hue,通过浏览器访问，会发生错误，原因是mysql数据库没有被初始化DatabaseError: (1146, "Table 'hue.desktop_settings' doesn't exist")
ProgrammingError: (1146, "Table 'hive.django_session' doesn't exist")
&　　初始化数据库
/home/hadoop/app/hue-3.9.0-cdh5.5.4/build/env
bin/hue syncdb
bin/hue migrate
　　执行完以后，可以在mysql中看到，hue相应的表已经生成。
　　启动hue, 能够正常访问了。
&　　当然，大家这里，可以先在mysql里面创建数据库。命名为hue，并且是以hadoop用户和hadoop密码。
　　首先，
[root@master app]# mysql -uroot -prootroot
mysql& create user 'hue' identified by 'hue';
//创建一个账号：用户名为hue，密码为hue
mysql& create user 'hue'@'%' identified by 'hue';
//创建一个账号：用户名为hue，密码为hue
mysql& GRANT ALL PRIVILEGES ON *.* to 'hue'@'%' IDENTIFIED BY 'hue' WITH GRANT OPTION;
//将权限授予host为%即所有主机的hue用户
mysql& GRANT ALL PRIVILEGES ON *.* to 'hue'@'bigdatamaster' IDENTIFIED BY 'hue' WITH GRANT OPTION;
//将权限授予host为master的hue用户
mysql& GRANT ALL PRIVILEGES ON *.* to 'hue'@'localhost' IDENTIFIED BY 'hue' WITH GRANT OPTION; //将权限授予host为localhost的hue用户（其实这一步可以不配）
mysql& GRANT ALL PRIVILEGES ON *.* to 'hue'@'bigdatamaster' IDENTIFIED BY 'hue' WITH GRANT OPTION;
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
mysql& select user,host,password from mysql.
+-------+---------------+-------------------------------------------+
| password
+-------+---------------+-------------------------------------------+
| localhost
| bigdatamaster |
| 127.0.0.1
| localhost
| bigdatamaster |
| *4DF1DE3B001A8FB1BBFBEA13E27FC |
| bigdatamaster | *4DF1DE3B001A8FB1BBFBEA13E27FC |
| localhost
| *4DF1DE3B001A8FB1BBFBEA13E27FC |
| oozie | %
| *2B03FE0359FAD3B4FCD |
| oozie | bigdatamaster | *2B03FE0359FAD3B4FCD |
| oozie | localhost
| *2B03FE0359FAD3B4FCD |
| *189C4D312DEAC3B87DDF542AF439E |
| localhost
| *189C4D312DEAC3B87DDF542AF439E |
| bigdatamaster | *189C4D312DEAC3B87DDF542AF439E |
+-------+---------------+-------------------------------------------+
15 rows in set (0.00 sec)
[root@bigdatamaster hadoop]#
# Configuration options for specifying the Desktop Database. For more info,
# see http://docs.djangoproject.com/en/1.4/ref/settings/#database-engine
# ------------------------------------------------------------------------
[[database]]
# Database engine is typically one of:
# postgresql_psycopg2, mysql, sqlite3 or oracle.
# Note that for sqlite3, 'name', below is a path to the filename. For other backends, it is the database name.
# Note for Oracle, options={"threaded":true} must be set in order to avoid crashes.
# Note for Oracle, you can use the Oracle Service Name by setting "port=0" and then "name=&host&:&port&/&service_name&".
# Note for MariaDB use the 'mysql' engine.
engine=mysql
host=bigdatamaster
password=hue
## options={}
　　完成以上的这个配置，启动Hue,通过浏览器访问，会发生错误。比如如下
　　如果大家遇到这个问题，别忘记还要创建数据库命名为hue。
OperationalError: (1049, "Unknown database 'hue'")
+--------------------+
| Database
+--------------------+
| information_schema |
+--------------------+
5 rows in set (0.00 sec)
mysql& CREATE DATABASE
Query OK, 1 row affected (0.49 sec)
Query OK, 0 rows affected (0.00 sec)
[root@bigdatamaster hadoop]#
　　启动hue之后，比如如下的错误，原因是mysql数据库没有被初始化。
ProgrammingError: (1146, "Table 'hue.django_session' doesn't exist")
　　则初始化数据库
/home/hadoop/app/hue-3.9.0-cdh5.5.4/build/env
bin/hue syncdb
bin/hue migrate
　　具体如下（这里一定要注意啦！！！先看完，再动手）
　　这里，大家一定要注意啊，如果这里你输入的是默认提示hadoop，则在登录的时候就是为hadoop啦。
&　　当然若这里，大家弄错了的话，还可以如我下面这样进行来弥补。
　　第一步：
　　所以，这样下来，不太好。
&　　所以我这里，为了避免这个情况发生，直接输入用户名为hue，密码也是为hue。
[hadoop@bigdatamaster env]$ pwd
/home/hadoop/app/hue-3.9.0-cdh5.5.4/build/env
[hadoop@bigdatamaster env]$ ll
drwxrwxr-x 2 hadoop hadoop 4096 May
5 20:59 bin
drwxrwxr-x 2 hadoop hadoop 4096 May
5 20:46 include
drwxrwxr-x 3 hadoop hadoop 4096 May
5 20:46 lib
lrwxrwxrwx 1 hadoop hadoop
5 20:46 lib64 -& lib
-rw-rw-r-- 1 hadoop hadoop
5 20:46 stamp
[hadoop@bigdatamaster env]$ bin/hue syncdb
Syncing...
Creating tables ...
Creating table auth_permission
Creating table auth_group_permissions
Creating table auth_group
Creating table auth_user_groups
Creating table auth_user_user_permissions
Creating table auth_user
Creating table django_openid_auth_nonce
Creating table django_openid_auth_association
Creating table django_openid_auth_useropenid
Creating table django_content_type
Creating table django_session
Creating table django_site
Creating table django_admin_log
Creating table south_migrationhistory
Creating table axes_accessattempt
Creating table axes_accesslog
You just installed Django's auth system, which means you don't have any superusers defined.
Would you like to create one now? (yes/no): yes
Username (leave blank to use 'hadoop'): hue
Email address:
Password: hue
Password (again):
Superuser created successfully.
Installing custom SQL ...
Installing indexes ...
Installed 0 object(s) from 0 fixture(s)
& django.contrib.auth
& django_openid_auth
& django.contrib.contenttypes
& django.contrib.sessions
& django.contrib.sites
& django.contrib.staticfiles
& django.contrib.admin
& filebrowser
& jobbrowser
& metastore
& zookeeper
Not synced (use migrations):
- django_extensions
- security
- useradmin
(use ./manage.py migrate to migrate these)
[hadoop@bigdatamaster env]$
　　然后，再
[hadoop@bigdatamaster env]$ pwd
/home/hadoop/app/hue-3.9.0-cdh5.5.4/build/env
[hadoop@bigdatamaster env]$ bin/hue migrate
Running migrations for django_extensions:
- Migrating forwards to 0001_empty.
& django_extensions:0001_empty
- Loading initial data for django_extensions.
Installed 0 object(s) from 0 fixture(s)
Running migrations for desktop:
- Migrating forwards to 0016_auto__add_unique_document2_uuid_version_is_history.
& pig:0001_initial
& oozie:0001_initial
& oozie:0002_auto__add_hive
& oozie:0003_auto__add_sqoop
& oozie:0004_auto__add_ssh
& oozie:0005_auto__add_shell
& oozie:0006_auto__chg_field_java_files__chg_field_java_archives__chg_field_sqoop_f
& oozie:0007_auto__chg_field_sqoop_script_path
& oozie:0008_auto__add_distcp
& oozie:0009_auto__add_decision
& oozie:0010_auto__add_fs
& oozie:0011_auto__add_email
& oozie:0012_auto__add_subworkflow__chg_field_email_subject__chg_field_email_body
& oozie:0013_auto__add_generic
& oozie:0014_auto__add_decisionend
& oozie:0015_auto__add_field_dataset_advanced_start_instance__add_field_dataset_ins
& oozie:0016_auto__add_field_coordinator_job_properties
& oozie:0017_auto__add_bundledcoordinator__add_bundle
& oozie:0018_auto__add_field_workflow_managed
& oozie:0019_auto__add_field_java_capture_output
& oozie:0020_chg_large_varchars_to_textfields
& oozie:0021_auto__chg_field_java_args__add_field_job_is_trashed
& oozie:0022_auto__chg_field_mapreduce_node_ptr__chg_field_start_node_ptr
& oozie:0022_change_examples_path_format
- Migration 'oozie:0022_change_examples_path_format' is marked for no-dry-run.
& oozie:0023_auto__add_field_node_data__add_field_job_data
& oozie:0024_auto__chg_field_subworkflow_sub_workflow
& oozie:0025_change_examples_path_format
- Migration 'oozie:0025_change_examples_path_format' is marked for no-dry-run.
& desktop:0001_initial
& desktop:0002_add_groups_and_homedirs
& desktop:0003_group_permissions
& desktop:0004_grouprelations
& desktop:0005_settings
& desktop:0006_settings_add_tour
& beeswax:0001_initial
& beeswax:0002_auto__add_field_queryhistory_notify
& beeswax:0003_auto__add_field_queryhistory_server_name__add_field_queryhistory_serve
& beeswax:0004_auto__add_session__add_field_queryhistory_server_type__add_field_query
& beeswax:0005_auto__add_field_queryhistory_statement_number
& beeswax:0006_auto__add_field_session_application
& beeswax:0007_auto__add_field_savedquery_is_trashed
& beeswax:0008_auto__add_field_queryhistory_query_type
& desktop:0007_auto__add_documentpermission__add_documenttag__add_document
/home/hadoop/app/hue-3.9.0-cdh5.5.4/build/env/lib/python2.6/site-packages/Django-1.6.10-py2.6.egg/django/db/backends/mysql/base.py:124: Warning: Some non-transactional changed tables couldn't be rolled back
return self.cursor.execute(query, args)
& desktop:0008_documentpermission_m2m_tables
& desktop:0009_auto__chg_field_document_name
& desktop:0010_auto__add_document2__chg_field_userpreferences_key__chg_field_userpref
& desktop:0011_auto__chg_field_document2_uuid
& desktop:0012_auto__chg_field_documentpermission_perms
& desktop:0013_auto__add_unique_documenttag_owner_tag
& desktop:0014_auto__add_unique_document_content_type_object_id
& desktop:0015_auto__add_unique_documentpermission_doc_perms
& desktop:0016_auto__add_unique_document2_uuid_version_is_history
- Loading initial data for desktop.
Installed 0 object(s) from 0 fixture(s)
Running migrations for beeswax:
- Migrating forwards to 0013_auto__add_field_session_properties.
& beeswax:0009_auto__add_field_savedquery_is_redacted__add_field_queryhistory_is_reda
& beeswax:0009_auto__chg_field_queryhistory_server_port
& beeswax:0010_merge_database_state
& beeswax:0011_auto__chg_field_savedquery_name
& beeswax:0012_auto__add_field_queryhistory_extra
& beeswax:0013_auto__add_field_session_properties
- Loading initial data for beeswax.
Installed 0 object(s) from 0 fixture(s)
Running migrations for hbase:
- Migrating forwards to 0001_initial.
& hbase:0001_initial
- Loading initial data for hbase.
Installed 0 object(s) from 0 fixture(s)
Running migrations for jobsub:
- Migrating forwards to 0006_chg_varchars_to_textfields.
& jobsub:0001_initial
& jobsub:0002_auto__add_ooziestreamingaction__add_oozieaction__add_oozieworkflow__ad
& jobsub:0003_convertCharFieldtoTextField
& jobsub:0004_hue1_to_hue2
- Migration 'jobsub:0004_hue1_to_hue2' is marked for no-dry-run.
& jobsub:0005_unify_with_oozie
- Migration 'jobsub:0005_unify_with_oozie' is marked for no-dry-run.
& jobsub:0006_chg_varchars_to_textfields
- Loading initial data for jobsub.
Installed 0 object(s) from 0 fixture(s)
Running migrations for oozie:
- Migrating forwards to 0027_auto__chg_field_node_name__chg_field_job_name.
& oozie:0026_set_default_data_values
- Migration 'oozie:0026_set_default_data_values' is marked for no-dry-run.
& oozie:0027_auto__chg_field_node_name__chg_field_job_name
- Loading initial data for oozie.
Installed 0 object(s) from 0 fixture(s)
Running migrations for pig:
- Nothing to migrate.
- Loading initial data for pig.
Installed 0 object(s) from 0 fixture(s)
Running migrations for search:
- Migrating forwards to 0003_auto__add_field_collection_owner.
& search:0001_initial
& search:0002_auto__del_core__add_collection
& search:0003_auto__add_field_collection_owner
- Loading initial data for search.
Installed 0 object(s) from 0 fixture(s)
? You have no migrations for the 'security' app. You might want some.
Running migrations for spark:
- Migrating forwards to 0001_initial.
& spark:0001_initial
- Loading initial data for spark.
Installed 0 object(s) from 0 fixture(s)
Running migrations for sqoop:
- Migrating forwards to 0001_initial.
& sqoop:0001_initial
- Loading initial data for sqoop.
Installed 0 object(s) from 0 fixture(s)
Running migrations for useradmin:
- Migrating forwards to 0006_auto__add_index_userprofile_last_activity.
& useradmin:0001_permissions_and_profiles
- Migration 'useradmin:0001_permissions_and_profiles' is marked for no-dry-run.
& useradmin:0002_add_ldap_support
- Migration 'useradmin:0002_add_ldap_support' is marked for no-dry-run.
& useradmin:0003_remove_metastore_readonly_huepermission
- Migration 'useradmin:0003_remove_metastore_readonly_huepermission' is marked for no-dry-run.
& useradmin:0004_add_field_UserProfile_first_login
& useradmin:0005_auto__add_field_userprofile_last_activity
& useradmin:0006_auto__add_index_userprofile_last_activity
- Loading initial data for useradmin.
Installed 0 object(s) from 0 fixture(s)
[hadoop@bigdatamaster env]$
　执行完以后，可以在mysql中看到，hue相应的表已经生成。
+--------------------+
| Database
+--------------------+
| information_schema |
+--------------------+
6 rows in set (0.06 sec)
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
+--------------------------------+
| Tables_in_hue
+--------------------------------+
| auth_group
| auth_group_permissions
| auth_permission
| auth_user
| auth_user_groups
| auth_user_user_permissions
| axes_accessattempt
| axes_accesslog
| beeswax_metainstall
| beeswax_queryhistory
| beeswax_savedquery
| beeswax_session
| desktop_document
| desktop_document2
| desktop_document2_dependencies |
| desktop_document2_tags
| desktop_document_tags
| desktop_documentpermission
| desktop_documenttag
| desktop_settings
| desktop_userpreferences
| django_admin_log
| django_content_type
| django_openid_auth_association |
| django_openid_auth_nonce
| django_openid_auth_useropenid
| django_session
| django_site
| documentpermission_groups
| documentpermission_users
| jobsub_checkforsetup
| jobsub_jobdesign
| jobsub_jobhistory
| jobsub_oozieaction
| jobsub_ooziedesign
| jobsub_ooziejavaaction
| jobsub_ooziemapreduceaction
| jobsub_ooziestreamingaction
| oozie_bundle
| oozie_bundledcoordinator
| oozie_coordinator
| oozie_datainput
| oozie_dataoutput
| oozie_dataset
| oozie_decision
| oozie_decisionend
| oozie_distcp
| oozie_email
| oozie_end
| oozie_fork
| oozie_fs
| oozie_generic
| oozie_history
| oozie_hive
| oozie_java
| oozie_job
| oozie_join
| oozie_kill
| oozie_link
| oozie_mapreduce
| oozie_node
| oozie_pig
| oozie_shell
| oozie_sqoop
| oozie_ssh
| oozie_start
| oozie_streaming
| oozie_subworkflow
| oozie_workflow
| pig_document
| pig_pigscript
| search_collection
| search_facet
| search_result
| search_sorting
| south_migrationhistory
| useradmin_grouppermission
| useradmin_huepermission
| useradmin_ldapgroup
| useradmin_userprofile
+--------------------------------+
80 rows in set (0.00 sec)
　　启动hue, 能够正常访问了。
[hadoop@bigdatamaster hue-3.9.0-cdh5.5.4]$ pwd
/home/hadoop/app/hue-3.9.0-cdh5.5.4
[hadoop@bigdatamaster hue-3.9.0-cdh5.5.4]$ build/env/bin/supervisor
　　Error loading MySQLdb module: libmysqlclient_r.so.16: cannot open shared object file: No such file or directory
　　把安装mysql 的虚拟机里找一个直接把libmysqlclient.so.18这个文件拷贝到系统指定的/usr/lib64库文件目录中。
　　大家，注意，以下是我的hive-site.xml配置信息，我的hive是安在bigdatamaster机器上，
　　我的这里配置是，
# Database options to send to the server when connecting.
# https://docs.djangoproject.com/en/1.4/ref/databases/
## options={}
# mysql, oracle, or postgresql configuration.
[[[mysql]]]
# Name to show in the UI.
nice_name="My SQL DB"
# For MySQL and PostgreSQL, name is the name of the database.
# For Oracle, Name is instance of the Oracle server. For express edition
# this is 'xe' by default.
# Database backend to use. This can be:
# 1. mysql
# 2. postgresql
# 3. oracle
engine=mysql
# IP or hostname of the database to connect to.
host=bigdatamaster
# Port the database server is listening to. Defaults are:
# 1. MySQL: 3306
# 2. PostgreSQL: 5432
# 3. Oracle Express Edition: 1521
# Username to authenticate with when connecting to the database.
# Password matching the username to authenticate with when
# connecting to the database.
password=hive
# Database options to send to the server when connecting.
# https://docs.djangoproject.com/en/1.4/ref/databases/
## options={}
　　该问题成功得到解决！
问题四（跟博文的问题十五一样）
　　点击&File Browser&报错：
　　Cannot access:/user/admin."注：您是hue管理员，但不是HDFS超级用户（即&&HDFS&&）
解决方法：
　　在$HADOOP_HOME的etc/hadoop中编辑core-site.xml文件,增加&
　　　　 &property&
&name&hadoop.proxyuser.oozie.hosts&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.ozzie.groups&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hue.hosts&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hue.groups&/name&
&value&*&/value&
&/property&
　　然后重启hadoop，stop-all.sh-----&start-all.sh即可。
　　该问题成功得到解决!
& & & 我一般配置是如下，在$HADOOP_HOME/etc/hadoop/下的core-site.xml里
&property&
&name&hadoop.proxyuser.hadoop.hosts&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hadoop.groups&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hue.hosts&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hue.groups&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hdfs.hosts&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hdfs.groups&/name&
&value&*&/value&
&/property&
　　为什么要这么加，是因为，我有三个用户，
　　这里，大家根据自己的实情去增加，修改完之后，一定要重启sbin/start-all.sh，就能解决问题了。
　　在Hue对HBase集成时， HBase &Browser 里出现&Api Error: TSocket read 0 bytes
　　解决办法
&　　https://stackoverflow.com/questions//api-error-tsocket-read-0-bytes-when-using-hue-with-hbase
Add this to your hbase "core-site.conf":
&property&
&name&hbase.thrift.support.proxyuser&/name&
&value&true&/value&
&/property&
&property&
&name&hbase.regionserver.thrift.http&/name&
&value&true&/value&
&/property&
　　即可，解决问题。
　　问题六：
　　&User: hadoop is not allowed to impersonate hue
Api 错误：&html& &head& &meta http-equiv="Content-Type" content="text/ charset=ISO-8859-1"/& &title&Error 500 User: hadoop is not allowed to impersonate hue&/title& &/head& &body&&h2&HTTP ERROR 500&/h2& &p&Problem accessing /. Reason: &pre& User: hadoop is not allowed to impersonate hue&/pre&&/p&&h3&Caused by:&/h3&&pre&javax.servlet.ServletException: User: hadoop is not allowed to impersonate hue at org.apache.hadoop.hbase.thrift.ThriftHttpServlet.doPost(ThriftHttpServlet.java:117) at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:401) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:767) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:945) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelE
&　　解决办法
&　　$HADOOP_HOME/ect/hadoop的core-site.xml里
&property&
&name&hadoop.proxyuser.hue.hosts&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hue.groups&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hue.hosts&/name&
&value&hadoop&/value&
&/property&
&property&
&name&hadoop.proxyuser.hue.groups&/name&
&value&hadoop&/value&
&/property&
　　问题七
　　&Api 错误：集群配置 (Cluster|bigdatamaster:9090 的格式设置不正确。
　　在hue里面查看HDFS文件浏览器报错:
　　当前用户没有权限查看,&
　　cause:org.apache.hadoop.ipc.StandbyException: Operation category READ is not supported in state standby
　　Web页面查看两个NameNode状态，是不是之前的namenode是standby状态了. 我现有的集群就是这种情况, 由于之前的服务是master1起的, 挂了之后自动切换到master2, 但是hue中webhdfs还是配置的master1,导致在hue中没有访问权限.
　　hive查询时报错
　　org.apache.hive.service.cli.HiveSQLException: Couldn't find log associated with operation handle: OperationHandle [opType=EXECUTE_STATEMENT, getHandleIdentifier()=b3d05ca6-e3e8-4bef-b869-0ea]
将hive-site.xml中的hive.server2.logging.operation.enabled=
&property&
&name&hive.server2.logging.operation.enabled&/name&
&value&true&/value&
&/property&
　　启动hue web端 报错误：OperationalError: attempt to write a readonly database
　　启动hue server的用户没有权限去写入默认sqlite DB，同时确保安装目录下所有文件的owner都是hadoop用户
chown -R hadoop:hadoop hue-3.9.0-cdh5.5.4
　　问题十一
HUE 报错误：Filesystem root &/& should be owned by &hdfs&
　　hue 文件系统根目录&/&应归属于&hdfs&
　　修改 文件desktop/libs/hadoop/src/hadoop/fs/webhdfs.py 中的 &DEFAULT_HDFS_SUPERUSER = &hdfs& &更改为你的hadoop用户
　　问题十二
　　错误：hbase-site.xml 配置文件中缺少 kerberos 主体名称。
&　　解决办法
　　问题十三
　　Hue下无法无法正确连接到 Zookeeper &timed out
　　解决办法
　　说明你的zookeeper模块，还没配置完全。
　　问题十四
Sqoop 错误:&无法获取连接器。
&　　解决办法
　　看下自己的sqoop版本是不是，不是Sqoop2版本。好比我的如下
　　大家要注意，Hue里是只支持Sqoop2版本，对于Sqoop1和Sqoop2版本，直接去官网看就得了。
&　　那么，得更换sqoop版本。
　　问题十五（见本博客的问题四）
无法访问：/user/hadoop。 Note: you are a Hue admin but not a HDFS superuser, "hdfs" or part of HDFS supergroup, "supergroup".
　　SecurityException: Failed to obtain user group information: org.apache.hadoop.security.authorize.AuthorizationException: User: hue is not allowed to impersonate hadoop (error 403)
　　那是因为，HUE安装完成之后，第一次登录的用户就是HUE的超级用户，可以管理用户，等等。但是在用的过程发现一个问题这个用户不能管理HDFS中由supergroup创建的数据。
　　虽然在HUE中创建的用户可以管理自己文件夹下面的数据/user/XXX。那么Hadoop superuser的数据怎么管理呢，ＨＵＥ提供了一个功能就是将Unix的用户和Hue集成，这样用Hadoop superuser的用户登录到ＨＵＥ中就能顺利的管理数据了。
下面几个步骤来进行集成
　　第一步：确保hadoop 这个用户组在系统之中（这个hadoop肯定是在系统中了）
　　第二步：运行下面命令
[hadoop@bigdatamaster env]$ pwd
/home/hadoop/app/hue-3.9.0-cdh5.5.4/build/env
[hadoop@bigdatamaster env]$ ll
drwxrwxr-x 2 hadoop hadoop 4096 May
5 20:59 bin
drwxrwxr-x 2 hadoop hadoop 4096 May
5 20:46 include
drwxrwxr-x 3 hadoop hadoop 4096 May
5 20:46 lib
lrwxrwxrwx 1 hadoop hadoop
5 20:46 lib64 -& lib
drwxrwxr-x 2 hadoop hadoop 4096 Aug
2 17:20 logs
-rw-rw-r-- 1 hadoop hadoop
5 20:46 stamp
[hadoop@bigdatamaster env]$ bin/hue useradmin_sync_with_unix
[hadoop@bigdatamaster env]$
&　　第三步：
　　运行完上面的命令，进入到ＨＵＥ总你就会发现用户已经集成进来了，但是，没有密码，所以需要给Ｕｎｉｘ的用户设定密码和分配用户组。
&　　这里，
　　&完成上述步骤之后，登陆进去，就能愉快地管理ＨＤＦＳ数据了。
HUE新建HDFS目录
　　问题描述: you are a Hue admin but not a HDFS superuser, &hdfs& or part of HDFS supergroup, &supergroup&　　解决方案：在hue中新增hdfs用户，以hdfs用户登录创建目录和上传文件
https://geosmart.github.io//CDH%E4%BD%BF%E7%94%A8%E9%97%AE%E9%A2%98%E8%AE%B0%E5%BD%95/
　　然后，其实还是没有成功，
　　说白了，这个问题还是要看本博文的问题四
& & 我一般配置是如下，在$HADOOP_HOME/etc/hadoop/下的core-site.xml里
&property&
&name&hadoop.proxyuser.hadoop.hosts&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hadoop.groups&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hue.hosts&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hue.groups&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hdfs.hosts&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hdfs.groups&/name&
&value&*&/value&
&/property&
　　为什么要这么加，是因为，我有三个用户，
　　这里，大家根据自己的实情去增加，修改完之后，一定要重启sbin/start-all.sh，就能解决问题了。
　　问题十六
　　无法为用户hue创建主目录， 无法为用户hadoop创建主目录，无法为用户hdfs创建主目录。
　解决办法
　　在$hadoop/etc/hadoop/core-site.xml&
&property&
&name&hadoop.proxyuser.hue.hosts&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hue.groups&/name&
&value&*&/value&
&/property&
　　比如，以下是无法为用户hdfs创建主目录，则
&property&
&name&hadoop.proxyuser.hdfs.hosts&/name&
&value&*&/value&
&/property&
&property&
&name&hadoop.proxyuser.hdfs.groups&/name&
&value&*&/value&
&/property&
　　成功！
　　问题十七
&&User [hue] not defined as proxyuser
　　问题来源：
The oozie is running, when I click WorkFlows, there appares a error
　　即，oozie启动后，当我在hue界面点击workfolws后，出现如下的错误
　　解决办法
Hue submits MapReduce jobs to Oozie as the logged in user. You need to configure Oozie to accept the&hue&user to be a proxyuser. Specify this in your&oozie-site.xml&(even in a non-secure cluster), and restart Oozie:
&property&
&name&oozie.service.ProxyUserService.proxyuser.hue.hosts&/name&
&value&*&/value&
&/property&
&property&
&name&oozie.service.ProxyUserService.proxyuser.hue.groups&/name&
&value&*&/value&
&/property&
　　参考： http://archive.cloudera.com/cdh4/cdh/4/hue-2.0.0-cdh4.0.1/manual.html
　　即，在oozie-site.xml配置文件里，加入
　　添加好之后，然后重启oozie。记得先jps下进程，Kill掉，再重启。
&　　注意：/home/hadoop/app/oozie是我安装oozie的目录。
&　　或者执行以下命令重启也是可以的。
[hadoop@bigdatamaster oozie]$ pwd
/home/hadoop/app/oozie
[hadoop@bigdatamaster oozie]$ bin/oozied.sh restart
　　然后，得到
　　问题十八
&　　Oozie 服务器未运行
&　　解决办法
　　问题十九
&Api 错误：('Connection aborted.', error(111, 'Connection refused'))
&　　解决办法
　问题二十
&&Could not connect to bigdatamaster:21050
&　　解决办法
&　　开启impala服务
　　问题二十一：
OperationalError: (2003, "Can't connect to MySQL server on 'bigdatamaster' (111)")
　　解决办法
[root@bigdatamaster hadoop]# service mysqld start
Starting mysqld:
[root@bigdatamaster hadoop]#
　　再刷新即可。
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