Linux安装Sqoop(CentOS7+Sqoop1.4.6+Hadoop2.8.0+Hive2.1.1)
1下载Sqoop
2上载和解压缩
3一系列配置
3.1配置环境变量
3.2sqoop配置文件修改
3.2.1 sqoop-env.sh文件
3.2.1.1新建
3.2.1.2编辑内容
3.3将MySQL驱动包上载到Sqoop的lib下
4使用sqoop
4.1使用help命令
4.2使用Sqoop查看MySQL中的数据表
4.3基于MySQL的表创建hive表
4.3.1创建
4.3.2测试
4.4将MySQL中的数据导入到hive中
4.4.1执行导入命令
4.4.2执行hive命令测试上面的操作是否成功
5报错和解决
5.1 java.net.NoRouteToHostException: No route to host(Host unreachable)
5.2 ERROR tool.ImportTool: Error during import: Importjob failed!
关键字：Linux CentOS Sqoop Hadoop Hive Java
版本号：CetOS7 Sqoop1.4.6 Hadoop2.8.0 Hive2.1.1
注意：本文只讲Sqoop1.4.6的安装。和hive一样，sqoop只需要在hadoop的namenode上安装即可。本例安装sqoop的机器上已经安装了hdoop2.8.0和hive2.1.1，hadoop2.8.0的安装请参考博文：
http://blog.csdn.net/pucao_cug/article/details/71698903
hive2.1.1的安装请参考博文：
http://blog.csdn.net/pucao_cug/article/details/71773665
1下载Sqoop
因为官方并不建议在生产环境中使用1.99.7版本，所以我们还是等2.0版本出来在用新的吧，现在依然使用1.4.6版本
打开官网：
http://sqoop.apache.org/
如图：
点击上图的nearby mirror
相当于是直接打开：http://www.apache.org/dyn/closer.lua/sqoop/
如图：
我选择的是http://mirror.bit.edu.cn/apache/sqoop/
如图：
点击1.4.6，相当于是直接打开地址：
http://mirror.bit.edu.cn/apache/sqoop/1.4.6/
如图：
2上载和解压缩
在opt目录下新建一个名为sqoop的目录，将下载得到的文件sqoop-1.4.6.bin__hadoop-2.0.4-alpha.tar上载到该目录内
如图：
进入到该目录下，执行解压缩，也就是执行命令：
cd /opt/sqoop
tar -xvf sqoop-1.4.6.bin__hadoop-2.0.4-alpha.tar.gz
命令执行完成后得到了/opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha目录
3一系列配置
3.1 配置环境变量
编辑/etc/profile文件，添加SQOOP_HOME变量，并且将$SQOOP_HOME/bin添加到PATH变量中，编辑方法很多，可以将profile文件下载到本地编辑，也可以直接用vim命令编辑。
添加的内容如下：
export JAVA_HOME=/opt/java/jdk1.8.0_121
export HADOOP_HOME=/opt/hadoop/hadoop-2.8.0
export HADOOP_CONF_DIR=${HADOOP_HOME}/etc/hadoop
export HADOOP_COMMON_LIB_NATIVE_DIR=${HADOOP_HOME}/lib/native
export HADOOP_OPTS="-Djava.library.path=${HADOOP_HOME}/lib"
export HIVE_HOME=/opt/hive/apache-hive-2.1.1-bin
export HIVE_CONF_DIR=${HIVE_HOME}/conf
export SQOOP_HOME=/opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha
export CLASS_PATH=.:${JAVA_HOME}/lib:${HIVE_HOME}/lib:$CLASS_PATH
export PATH=.:${JAVA_HOME}/bin:${HADOOP_HOME}/bin:${HADOOP_HOME}/sbin: ${HIVE_HOME}/bin:${SQOOP_HOME}/bin:$PATH
/etc/profile文件编辑完成后，执行命令：
source /etc/profile
3.2 Sqoop配置文件修改
3.2.1 sqoop-env.sh文件
3.2.1.1 新建
进入到/opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/conf目录下，也就是执行命令：
cd /opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/conf
将sqoop-env-template.sh复制一份，并取名为sqoop-env.sh，也就是执行命令：
cp sqoop-env-template.sh sqoop-env.sh
如图：
3.2.1.2 编辑内容
编辑这个新建的sqoop-env.sh文件，编辑方法有很多，可以下载到本地编辑，也可是使用vim命令编辑。
在该文件末尾加入下面的配置：
export HADOOP_COMMON_HOME=/opt/hadoop/hadoop-2.8.0
export HADOOP_MAPRED_HOME=/opt/hadoop/hadoop-2.8.0
export HIVE_HOME=/opt/hive/apache-hive-2.1.1-bin
说明：上面的路径修改为自己的hadoop路径和hive路径。
3.3 将MySQL驱动包上载到Sqoop的lib下
将MySQL的驱动包上载到Sqoop安装目录的lib子目录下
如图：
说明：该驱动不是越旧越好，也不是越新越好，5.1.31我这里测试是可以的。
4 使用sqoop
sqoop是一个工具，安装完成后，如果操作的命令不涉及hive和hadoop的，可以实现不启动hive和hadoop，直接输入sqoop命令即可，例如sqoop help命令。要使用hive相关的命令，必须事先启动hive和hadoop。
hadoop的安装和启动可以参考该博文：
http://blog.csdn.net/pucao_cug/article/details/71698903
hive的安装和启动可以参考该博文：
http://blog.csdn.net/pucao_cug/article/details/71773665
4.1 使用help命令
首先看看sqoop都有哪些命令，在终上输入命令：
sqoop help
如图：
上图中的内容是：
[root@hserver1 ~]# sqoop help
Warning:/opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/../hbase does not exist! HBaseimports will fail.
Please set $HBASE_HOME to the root of yourHBase installation.
Warning:/opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/../hcatalog does not exist! HCatalogjobs will fail.
Please set $HCAT_HOME to the root of yourHCatalog installation.
Warning:/opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/../accumulo does not exist!Accumulo imports will fail.
Please set $ACCUMULO_HOME to the root ofyour Accumulo installation.
Warning:/opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/../zookeeper does not exist!Accumulo imports will fail.
Please set $ZOOKEEPER_HOME to the root ofyour Zookeeper installation.
17/05/14 16:21:30 INFO sqoop.Sqoop: RunningSqoop version: 1.4.6
usage: sqoop COMMAND [ARGS]
Available commands:
codegen Generate codeto interact with database records
create-hive-table Import a tabledefinition into Hive
eval Evaluate a SQLstatement and display the results
export Export an HDFS directory to adatabase table
help List availablecommands
import Import a tablefrom a database to HDFS
import-all-tables Import tablesfrom a database to HDFS
import-mainframe Import datasetsfrom a mainframe server to HDFS
job Work with savedjobs
list-databases List availabledatabases on a server
list-tables List availabletables in a database
merge Merge resultsof incremental imports
metastore Run astandalone Sqoop metastore
version Display versioninformation
See 'sqoop help COMMAND' for information ona specific command.
[root@hserver1 ~]#说明：因为我们没有基于hadoop安装HBase，所以HBase相关的命令不能用，但是操作hadoop分布式文件系统的命令是可以用的。
4.2 使用Sqoop查看MySQL中的数据表
下面是使用命令查看MySQL数据库中的数据表list，命令是(命令中不能有回车，必须是在同一行，复制粘贴时候请注意)：
sqoop list-tables --username root --password 'cj' --connect jdbc:mysql://192.168.27.132:3306/hello?characterEncoding=UTF-8如图：
4.3 基于MySQL的表创建hive表
4.3.1 创建
注意：hive是基于hadoop的HDFS的，在运行下面的导入命令请，请确保hadoop和hive都在正常运行。
现在MySQL数据库服务器上有一个数据库名为 hello，下面有一张表名为people
如图：
执行命令，在已经存在的db_hive_deu这个库中创建名为place的表：
sqoop create-hive-table --connect jdbc:mysql://192.168.119.132:3306/hello?characterEncoding=UTF-8 --table people --username root -password 'cj' --hive-database db_hive_edu如图：
上图中的内容是：
[root@hserver1 ~]# sqoop create-hive-table --connect jdbc:mysql://192.168.119.132:3306/hello?characterEncoding=UTF-8 --table people --username root -password 'cj' --hive-database db_hive_edu
Warning: /opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/../hbasedoes not exist! HBase imports will fail.
Please set $HBASE_HOME to the root of your HBase installation.
Warning: /opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/../hcatalogdoes not exist! HCatalog jobs will fail.
Please set $HCAT_HOME to the root of your HCatalog installation.
Warning: /opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/../accumulodoes not exist! Accumulo imports will fail.
Please set $ACCUMULO_HOME to the root of your Accumulo installation.
Warning: /opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/../zookeeperdoes not exist! Accumulo imports will fail.
Please set $ZOOKEEPER_HOME to the root of your Zookeeperinstallation.
17/05/14 21:06:06 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6
17/05/14 21:06:06 WARN tool.BaseSqoopTool: Setting your password onthe command-line is insecure. Consider using -P instead.
17/05/14 21:06:06 INFO tool.BaseSqoopTool: Using Hive-specificdelimiters for output. You can override
17/05/14 21:06:06 INFO tool.BaseSqoopTool: delimiters with--fields-terminated-by, etc.
17/05/14 21:06:07 INFO manager.MySQLManager: Preparing to use aMySQL streaming resultset.
17/05/14 21:06:09 INFO manager.SqlManager: Executing SQL statement:SELECT t.* FROM `people` AS t LIMIT 1
17/05/14 21:06:09 INFO manager.SqlManager: Executing SQL statement:SELECT t.* FROM `people` AS t LIMIT 1
17/05/14 21:06:11 WARN util.NativeCodeLoader: Unable to loadnative-hadoop library for your platform... using builtin-java classes whereapplicable
17/05/14 21:06:16 INFO hive.HiveImport: Loading uploaded data intoHive
17/05/14 21:06:26 INFO hive.HiveImport: which: no hbase in (.:/opt/java/jdk1.8.0_121/bin:/opt/hadoop/hadoop-2.8.0/bin:/opt/hadoop/hadoop-2.8.0/sbin:/opt/hive/apache-hive-2.1.1-bin/bin:/opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin)
17/05/14 21:06:29 INFO hive.HiveImport: SLF4J: Class path containsmultiple SLF4J bindings.
17/05/14 21:06:29 INFO hive.HiveImport: SLF4J: Found binding in[jar:file:/opt/hive/apache-hive-2.1.1-bin/lib/log4j-slf4j-impl-2.4.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
17/05/14 21:06:29 INFO hive.HiveImport: SLF4J: Found binding in[jar:file:/opt/hadoop/hadoop-2.8.0/share/hadoop/common/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
17/05/14 21:06:29 INFO hive.HiveImport: SLF4J: Seehttp://www.slf4j.org/codes.html#multiple_bindings for an explanation.
17/05/14 21:06:58 INFO hive.HiveImport:
17/05/14 21:06:58 INFO hive.HiveImport: Logging initialized usingconfiguration injar:file:/opt/hive/apache-hive-2.1.1-bin/lib/hive-common-2.1.1.jar!/hive-log4j2.propertiesAsync: true
17/05/14 21:07:32 INFO hive.HiveImport: OK
17/05/14 21:07:32 INFO hive.HiveImport: Time taken: 6.657 seconds
17/05/14 21:07:32 INFO hive.HiveImport: Hive import complete.
[root@hserver1 ~]#注意：create-hive-table只是创建hive表，并没有导入数据，导入数据的命令在4.4中讲到。
4.3.2 测试
在hive命令模式下，输入以下命令，切换到db_hive_edu数据库中，命令是：
use db_hive_edu;
如图：
在hive命令模式下，输入以下命令：
show tables;
如图：
4.4 将MySQL中的数据导入到hive中
4.4.1 执行导入命令
注意：hive是基于hadoop的HDFS的，在运行下面的导入命令请，请确保hadoop和hive都在正常运行。需要额外说明的是，下面的命令不需要以4.3为前提，也就是说直接执行下面的命令即可，不需要事先在hive上创建对应的表。
执行下面的命令(下面的命令在同一行内):
sqoop import --connect jdbc:mysql://192.168.119.132:3306/hello?characterEncoding=UTF-8 --table place --username root -password 'cj' --fields-terminated-by ',' --hive-import --hive-database db_hive_edu -m 1如图：
上图中的内容是(完整的)：
[root@hserver1~]# sqoop import --connect jdbc:mysql://192.168.119.132:3306/hello?characterEncoding=UTF-8 --table place --username root -password 'cj' --fields-terminated-by ',' --hive-import --hive-databasedb_hive_edu -m 1
Warning: /opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/../hbasedoes not exist! HBase imports will fail.
Please set $HBASE_HOME to the root of yourHBase installation.
Warning:/opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/../hcatalog does not exist!HCatalog jobs will fail.
Please set $HCAT_HOME to the root of yourHCatalog installation.
Warning:/opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/../accumulo does not exist!Accumulo imports will fail.
Please set $ACCUMULO_HOME to the root ofyour Accumulo installation.
Warning: /opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/../zookeeperdoes not exist! Accumulo imports will fail.
Please set $ZOOKEEPER_HOME to the root ofyour Zookeeper installation.
17/05/14 20:44:07 INFO sqoop.Sqoop: RunningSqoop version: 1.4.6
17/05/14 20:44:08 WARN tool.BaseSqoopTool:Setting your password on the command-line is insecure. Consider using -Pinstead.
17/05/14 20:44:08 INFOmanager.MySQLManager: Preparing to use a MySQL streaming resultset.
17/05/14 20:44:08 INFO tool.CodeGenTool:Beginning code generation
17/05/14 20:44:10 INFO manager.SqlManager:Executing SQL statement: SELECT t.* FROM `place` AS t LIMIT 1
17/05/14 20:44:10 INFO manager.SqlManager:Executing SQL statement: SELECT t.* FROM `place` AS t LIMIT 1
17/05/14 20:44:10 INFOorm.CompilationManager: HADOOP_MAPRED_HOME is /opt/hadoop/hadoop-2.8.0
Note:/tmp/sqoop-root/compile/382b047cc7e935d9ba3014747288b5f7/place.java uses oroverrides a deprecated API.
Note: Recompile with -Xlint:deprecation fordetails.
17/05/14 20:44:18 INFOorm.CompilationManager: Writing jar file:/tmp/sqoop-root/compile/382b047cc7e935d9ba3014747288b5f7/place.jar
17/05/14 20:44:18 WARNmanager.MySQLManager: It looks like you are importing from mysql.
17/05/14 20:44:18 WARNmanager.MySQLManager: This transfer can be faster! Use the --direct
17/05/14 20:44:18 WARNmanager.MySQLManager: option to exercise a MySQL-specific fast path.
17/05/14 20:44:18 INFOmanager.MySQLManager: Setting zero DATETIME behavior to convertToNull (mysql)
17/05/14 20:44:18 INFOmapreduce.ImportJobBase: Beginning import of place
17/05/14 20:44:18 INFOConfiguration.deprecation: mapred.job.tracker is deprecated. Instead, usemapreduce.jobtracker.address
17/05/14 20:44:20 WARNutil.NativeCodeLoader: Unable to load native-hadoop library for yourplatform... using builtin-java classes where applicable
17/05/14 20:44:20 INFOConfiguration.deprecation: mapred.jar is deprecated. Instead, usemapreduce.job.jar
17/05/14 20:44:24 INFOConfiguration.deprecation: mapred.map.tasks is deprecated. Instead, usemapreduce.job.maps
17/05/14 20:44:25 INFO client.RMProxy:Connecting to ResourceManager at hserver1/192.168.119.128:8032
17/05/14 20:44:41 INFO db.DBInputFormat:Using read commited transaction isolation
17/05/14 20:44:42 INFOmapreduce.JobSubmitter: number of splits:1
17/05/14 20:44:43 INFOmapreduce.JobSubmitter: Submitting tokens for job: job_1494764774368_0001
17/05/14 20:44:49 INFO impl.YarnClientImpl:Submitted application application_1494764774368_0001
17/05/14 20:44:49 INFO mapreduce.Job: Theurl to track the job:http://hserver1:8088/proxy/application_1494764774368_0001/
17/05/14 20:44:49 INFO mapreduce.Job:Running job: job_1494764774368_0001
17/05/14 20:45:40 INFO mapreduce.Job: Jobjob_1494764774368_0001 running in uber mode : false
17/05/14 20:45:40 INFO mapreduce.Job: map 0% reduce 0%
17/05/14 20:46:21 INFO mapreduce.Job: map 100% reduce 0%
17/05/14 20:46:25 INFO mapreduce.Job: Jobjob_1494764774368_0001 completed successfully
17/05/14 20:46:25 INFO mapreduce.Job:Counters: 30
File System Counters
FILE: Number of bytes read=0
FILE: Number of byteswritten=154570
FILE: Number of readoperations=0
FILE: Number of large readoperations=0
FILE: Number of writeoperations=0
HDFS: Number of bytes read=87
HDFS: Number of byteswritten=10
HDFS: Number of readoperations=4
HDFS: Number of large readoperations=0
HDFS: Number of writeoperations=2
Job Counters
Launched map tasks=1
Other local map tasks=1
Total time spent by all maps inoccupied slots (ms)=34902
Total time spent by all reducesin occupied slots (ms)=0
Total time spent by all maptasks (ms)=34902
Total vcore-milliseconds takenby all map tasks=34902
Total megabyte-millisecondstaken by all map tasks=35739648
Map-Reduce Framework
Map input records=2
Map output records=2
Input split bytes=87
Spilled Records=0
Failed Shuffles=0
Merged Map outputs=0
GC time elapsed (ms)=190
CPU time spent (ms)=2490
Physical memory (bytes)snapshot=102395904
Virtual memory (bytes)snapshot=2082492416
Total committed heap usage(bytes)=16318464
File Input Format Counters
Bytes Read=0
File Output Format Counters
Bytes Written=10
17/05/14 20:46:25 INFOmapreduce.ImportJobBase: Transferred 10 bytes in 121.3811 seconds (0.0824bytes/sec)
17/05/14 20:46:25 INFOmapreduce.ImportJobBase: Retrieved 2 records.
17/05/14 20:46:26 INFO manager.SqlManager:Executing SQL statement: SELECT t.* FROM `place` AS t LIMIT 1
17/05/14 20:46:26 INFO hive.HiveImport:Loading uploaded data into Hive
17/05/14 20:48:25 INFO hive.HiveImport:which: no hbase in(.:/opt/java/jdk1.8.0_121/bin:/opt/hadoop/hadoop-2.8.0/bin:/opt/hadoop/hadoop-2.8.0/sbin:/opt/hive/apache-hive-2.1.1-bin/bin:/opt/sqoop/sqoop-1.4.6.bin__hadoop-2.0.4-alpha/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin)
17/05/14 20:48:28 INFO hive.HiveImport:SLF4J: Class path contains multiple SLF4J bindings.
17/05/14 20:48:28 INFO hive.HiveImport:SLF4J: Found binding in[jar:file:/opt/hive/apache-hive-2.1.1-bin/lib/log4j-slf4j-impl-2.4.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
17/05/14 20:48:28 INFO hive.HiveImport:SLF4J: Found binding in[jar:file:/opt/hadoop/hadoop-2.8.0/share/hadoop/common/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
17/05/14 20:48:28 INFO hive.HiveImport:SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for anexplanation.
17/05/14 20:49:48 INFO hive.HiveImport:
17/05/14 20:49:48 INFO hive.HiveImport:Logging initialized using configuration injar:file:/opt/hive/apache-hive-2.1.1-bin/lib/hive-common-2.1.1.jar!/hive-log4j2.propertiesAsync: true
17/05/14 20:50:16 INFO hive.HiveImport: OK
17/05/14 20:50:16 INFO hive.HiveImport:Time taken: 3.735 seconds
17/05/14 20:50:18 INFO hive.HiveImport:Loading data to table db_hive_edu.place
17/05/14 20:50:20 INFO hive.HiveImport: OK
17/05/14 20:50:20 INFO hive.HiveImport:Time taken: 4.872 seconds
17/05/14 20:50:21 INFO hive.HiveImport:Hive import complete.
17/05/14 20:50:21 INFO hive.HiveImport:Export directory is contains the _SUCCESS file only, removing the directory.
[root@hserver1 ~]#4.4.2 执行hive命令测试上面的操作是否成功
切换到刚才hive命令行（为了方便，我一般都是开了个连接，一个是普通的Linux命令模式，一个是启动hive，用于执行hive命令）。
在hive命令模式下，输入以下命令，切换到db_hive_edu数据库中，命令是：
use db_hive_edu;
如图：
在hive命令模式下，输入以下命令：
show tables;
如图：
在hive命令模式下，输入以下命令查看people表里的数据：
select * from place;
如图：
5 报错和解决
5.1 java.net.NoRouteToHostException: No route to host (Host unreachable)
检查你命令中的IP地址是否写错了，检查命令中的--connect后面的IP地址，出现这个错误，往往是这个地方写错了。
5.2 ERROR tool.ImportTool: Error during import: Import job failed!
在执行sqoop import从MySql导出数据到hive时候报错，完整报错是：
java.lang.Exception:java.lang.RuntimeException: java.lang.ClassNotFoundException: Class place notfound
atorg.apache.hadoop.mapred.LocalJobRunner$Job.runTasks(LocalJobRunner.java:489)
atorg.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:549)
Caused by:java.lang.RuntimeException: java.lang.ClassNotFoundException: Class place notfound
atorg.apache.hadoop.conf.Configuration.getClass(Configuration.java:2216)
at org.apache.sqoop.mapreduce.db.DBConfiguration.getInputClass(DBConfiguration.java:403)
atorg.apache.sqoop.mapreduce.db.DataDrivenDBInputFormat.createDBRecordReader(DataDrivenDBInputFormat.java:237)
atorg.apache.sqoop.mapreduce.db.DBInputFormat.createRecordReader(DBInputFormat.java:263)
atorg.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.
atorg.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:758)
atorg.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
atorg.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:270)
atjava.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
atjava.util.concurrent.FutureTask.run(FutureTask.java:266)
atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
atjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
atjava.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException:Class place not found
atorg.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:2122)
atorg.apache.hadoop.conf.Configuration.getClass(Configuration.java:2214)
... 12 more
17/05/14 22:17:45 INFO mapreduce.Job:Job job_local612327026_0001 failed with state FAILED due to: NA
17/05/14 22:17:45 INFOmapreduce.Job: Counters: 0
17/05/14 22:17:46 WARNmapreduce.Counters: Group FileSystemCounters is deprecated. Useorg.apache.hadoop.mapreduce.FileSystemCounter instead
17/05/14 22:17:46 INFOmapreduce.ImportJobBase: Transferred 0 bytes in 19.1156 seconds (0 bytes/sec)
17/05/14 22:17:46 WARNmapreduce.Counters: Group org.apache.hadoop.mapred.Task$Counter is deprecated.Use org.apache.hadoop.mapreduce.TaskCounter instead
17/05/14 22:17:46 INFOmapreduce.ImportJobBase: Retrieved 0 records.
17/05/14 22:17:46 ERRORtool.ImportTool: Error during import: Import job failed!
原因：
和hadoop的配置和有关系，需要启用yar这个mapreduce框架。
解决方法：
我的hadoop安装路径是/opt/hadoop/hadoop-2.8.0/。
找到/opt/hadoop/hadoop-2.8.0/etc/hadoop/mapred-site.xml配置文件，加入配置：
如图：
