我正在尝试在EMR集群上运行S3上的hive脚本。
通过SSH连接到EMR群集时，然后键入
"hive -f s3://..."
作品。但是，我希望这是自动完成的，所以我创建了一个python脚本，并尝试向集群添加一个步骤。但是，即使通过AWS控制台手动添加，也无法运行此步骤。对于jar文件，我指定“command-runner.jar”但是我随后使用的任何参数（我尝试使用“hive -f s3：// ...”，如另一个线程所建议的但是不起作用），步骤总是立即失败。当切换到script-runner.jar而不是command-runner时，我可以以某种方式使用该命令
/usr/share/aws/emr/scripts/hive-script --run-hive-script --args -f s3://...
但是，几秒钟后我得到一个错误，在stderr中我会发现这个错误。
Logging initialized using configuration in jar:file:/home/hadoop/.versions/hive-0.13.1-amzn-3/lib/hive-common-0.13.1-amzn-3.jar!/hive-log4j.properties
Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient
at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:346)
at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:692)
at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:636)
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.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient
at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1420)
at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(RetryingMetaStoreClient.java:62)
at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:72)
at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:2483)
at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:2495)
at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:340)
... 7 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1418)
... 12 more
Caused by: javax.jdo.JDOFatalDataStoreException: Unable to open a test connection to the given database. JDBC url = jdbc:mysql://localhost:3306/hive?createDatabaseIfNotExist=true, username = hive. Terminating connection pool (set lazyInit to true if you expect to start your database after your app). Original Exception: ------
java.sql.SQLException: Access denied for user 'hive'@'localhost' (using password: YES)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1084)
理想情况下，我想通过使用command-runner.jar来解决这个问题。有人可以告诉我我应该使用的正确参数（在aws控制台和/或add_job_flow的Boto3参数中）吗？
好吧，对于有同样问题的人：原来我错过了将“Hive”添加到EMR集群的应用程序中......