Hive的介绍和安装

Hive是什么

Hive是一个数据仓库，使用sql脚本就可以了
Hive包含几个引擎
解释器，编译器，优化器等

接触hive

首先我们进入到相应的官方文档中，接触hive的命令使用https://cwiki.apache.org/confluence/display/Hive/LanguageManual

然后我们打开命令行的模式

usage: hive

 -d,--define <key=value>          Variable substitution to apply to hive
                                  commands. e.g. -d A=B or --define A=B
 -e <quoted-query-string>         SQL from command line
 -f <filename>                    SQL from files
 -H,--help                        Print help information
 -h <hostname>                    Connecting to Hive Server on remote host
    --hiveconf <property=value>   Use value for given property
    --hivevar <key=value>         Variable substitution to apply to hive
                                  commands. e.g. --hivevar A=B
 -i <filename>                    Initialization SQL file
 -p <port>                        Connecting to Hive Server on port number
 -S,--silent                      Silent mode in interactive shell
 -v,--verbose                     Verbose mode (echo executed SQL to the
                                  console)

这个SQL并不是我们数据库中使用的SQL而是hive中的SQL只是类似数据库中的SQL

开始安装hive

安装好hadoop
首先我们得安装好hadoop才可以

安装hive

解压我hive压缩包

建立软链

进行配置

吧 hive-default.xml.template拷贝一下，改名字为hive-site.xml

我们还得配置一下hadoop的环境变量

配好之后修改一下相应的hive-site.xml文件

由于我们使用的是hive1.2比较新，所以请参考启动hive报错2

使用一下hive

异常：

1、启动hive时候报异常

Exception in thread "main" java.lang.RuntimeException: java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: ${system:java.io.tmpdir%7D/$%7Bsystem:user.name%7D
    at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:522)
    at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:677)
    at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:621)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:212)
Caused by: java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: ${system:java.io.tmpdir%7D/$%7Bsystem:user.name%7D
    at org.apache.hadoop.fs.Path.initialize(Path.java:206)
    at org.apache.hadoop.fs.Path.<init>(Path.java:172)
    at org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(SessionState.java:563)
    at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:508)
    ... 7 more
Caused by: java.net.URISyntaxException: Relative path in absolute URI: ${system:java.io.tmpdir%7D/$%7Bsystem:user.name%7D
    at java.net.URI.checkPath(URI.java:1804)
    at java.net.URI.<init>(URI.java:752)
    at org.apache.hadoop.fs.Path.initialize(Path.java:203)
    ... 10 more

解决办法：

解决方案如下：
1.查看hive-site.xml配置，会看到配置值含有”system:java.io.tmpdir”的配置项
2.新建文件夹/home/grid/hive-0.14.0-bin/iotmp
3.将含有”system:java.io.tmpdir”的配置项的值修改为如上地址
启动hive，成功！

2、启动hive时报错2

[ERROR] Terminal initialization failed; falling back to unsupported
java.lang.IncompatibleClassChangeError: Found class jline.Terminal, but interface was expected
    at jline.TerminalFactory.create(TerminalFactory.java:101)
    at jline.TerminalFactory.get(TerminalFactory.java:158)
    at jline.console.ConsoleReader.<init>(ConsoleReader.java:229)
    at jline.console.ConsoleReader.<init>(ConsoleReader.java:221)
    at jline.console.ConsoleReader.<init>(ConsoleReader.java:209)
    at org.apache.hadoop.hive.cli.CliDriver.setupConsoleReader(CliDriver.java:787)
    at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:721)
    at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:681)
    at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:621)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:212)

Exception in thread "main" java.lang.IncompatibleClassChangeError: Found class jline.Terminal, but interface was expected
    at jline.console.ConsoleReader.<init>(ConsoleReader.java:230)
    at jline.console.ConsoleReader.<init>(ConsoleReader.java:221)
    at jline.console.ConsoleReader.<init>(ConsoleReader.java:209)
    at org.apache.hadoop.hive.cli.CliDriver.setupConsoleReader(CliDriver.java:787)
    at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:721)
    at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:681)
    at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:621)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:212)

解决办法：

原因是hadoop目录下存在老版本jline：
/hadoop-2.5.2/share/hadoop/yarn/lib：
-rw-r–r– 1 root root 87325 Mar 10 18:10 jline-0.9.94.jar

解决方法是：
将hive下的新版本jline的JAR包拷贝到hadoop下：
cp /hive/apache-hive-1.1.0-bin/lib/jline-2.12.jar ./

/hadoop-2.5.2/share/hadoop/yarn/lib：
-rw-r–r– 1 root root 87325 Mar 10 18:10 jline-0.9.94.jar.bak
-rw-r–r– 1 root root 213854 Mar 11 22:22 jline-2.12.jar

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