JAVA高级面试进阶训练营视频教程

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　　首次安装hive-2.1.0，通过bin/hive登录hive shell命令行，报错如下：

[hadoop@db03 hive-2.1.0]$ bin/hive which: no hbase in (/opt/service/jdk1.7.0_67/bin:/opt/service/jdk1.7.0_67/jre/bin:/opt/mysql-5.6.24/bin:/opt/service/jdk1.7.0_67/bin:/opt/service/jdk1.7.0_67/jre/bin:/usr/lib64/qt-3.3/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/hadoop/bin) SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/opt/apache/hive-2.1.0/lib/log4j-slf4j-impl-2.4.1.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/opt/apache/hadoop-2.7.3/share/hadoop/common/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory] Logging initialized using configuration in file:/opt/apache/hive-2.1.0/conf/hive-log4j2.properties Async: true Exception in thread "main" java.lang.RuntimeException: org.apache.hadoop.hive.ql.metadata.HiveException: org.apache.hadoop.hive.ql.metadata.HiveException: MetaException(message:Hive metastore database is not initialized. Please use schematool (e.g. ./schematool -initSchema -dbType ...) to create the schema. If needed, don't forget to include the option to auto-create the underlying database in your JDBC connection string (e.g. ?createDatabaseIfNotExist=true for mysql)) at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:578) at org.apache.hadoop.hive.ql.session.SessionState.beginStart(SessionState.java:518) at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:705) at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:641) 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.run(RunJar.java:221) at org.apache.hadoop.util.RunJar.main(RunJar.java:136) Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: org.apache.hadoop.hive.ql.metadata.HiveException: MetaException(message:Hive metastore database is not initialized. Please use schematool (e.g. ./schematool -initSchema -dbType ...) to create the schema. If needed, don't forget to include the option to auto-create the underlying database in your JDBC connection string (e.g. ?createDatabaseIfNotExist=true for mysql)) at org.apache.hadoop.hive.ql.metadata.Hive.registerAllFunctionsOnce(Hive.java:226) at org.apache.hadoop.hive.ql.metadata.Hive.<init>(Hive.java:366) at org.apache.hadoop.hive.ql.metadata.Hive.create(Hive.java:310) at org.apache.hadoop.hive.ql.metadata.Hive.getInternal(Hive.java:290) at org.apache.hadoop.hive.ql.metadata.Hive.get(Hive.java:266) at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:545) ... 9 more Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: MetaException(message:Hive metastore database is not initialized. Please use schematool (e.g. ./schematool -initSchema -dbType ...) to create the schema. If needed, don't forget to include the option to auto-create the underlying database in your JDBC connection string (e.g. ?createDatabaseIfNotExist=true for mysql)) at org.apache.hadoop.hive.ql.metadata.Hive.getAllFunctions(Hive.java:3593) at org.apache.hadoop.hive.ql.metadata.Hive.reloadFunctions(Hive.java:236) at org.apache.hadoop.hive.ql.metadata.Hive.registerAllFunctionsOnce(Hive.java:221) ... 14 more Caused by: MetaException(message:Hive metastore database is not initialized. Please use schematool (e.g. ./schematool -initSchema -dbType ...) to create the schema. If needed, don't forget to include the option to auto-create the underlying database in your JDBC connection string (e.g. ?createDatabaseIfNotExist=true for mysql)) at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:3364) at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:3336) at org.apache.hadoop.hive.ql.metadata.Hive.getAllFunctions(Hive.java:3590) ... 16 more

根据日志提示，是元数据没有初始化，可以通过./schematool -initSchema -dbType命令初始化源数据库，因为我这里是mysql数据库，所知执行以下命令：

[hadoop@db03 hive-2.1.0]$ bin/schematool -initSchema -dbType mysql which: no hbase in (/opt/service/jdk1.7.0_67/bin:/opt/service/jdk1.7.0_67/jre/bin:/opt/mysql-5.6.24/bin:/opt/service/jdk1.7.0_67/bin:/opt/service/jdk1.7.0_67/jre/bin:/usr/lib64/qt-3.3/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/hadoop/bin) SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/opt/apache/hive-2.1.0/lib/log4j-slf4j-impl-2.4.1.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/opt/apache/hadoop-2.7.3/share/hadoop/common/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory] Metastore connection URL:  jdbc:mysql://db03:3306/hive?createDatabaseIfNotExist=true Metastore Connection Driver :  com.mysql.jdbc.Driver Metastore connection User:  root Starting metastore schema initialization to 2.1.0 Initialization script hive-schema-2.1.0.mysql.sql Initialization script completed schemaTool completed

再次通过bin/hive命令登录hive shell，成功登录，问题得以解决，以前一直使用hive-0.13.1，初次使用hive不需要初始化数据库既可以直接登录。