【发布时间】：2013-02-15 14:23:49
【问题描述】：
我正在开发一个java程序。
java程序将数据从hive导出到mysql。
首先，我写代码
ProcessBuilder pb = new ProcessBuilder("sqoop-export", "export",
"--connect", "jdbc:mysql://localhost/mydb",
"--hadoop-home", "/home/yoonhok/development/hadoop-1.1.1",
"--table", "mytable",
"--export-dir", "/user/hive/warehouse/tbl_2",
"--username", "yoonhok",
"--password", "1234");
try {
Process p = pb.start();
if (p.waitFor() != 0) {
System.out.println("Error: sqoop-export failed.");
return false;
}
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
效果很好。
但我学会了一种在 java 中使用 sqoop 的新方法。
Sqoop 还不支持客户端 api。
所以我添加了 sqoop 库，只写了 Sqoop.run()
其次，我用新的方式重新编写代码。
String[] str = {"export",
"--connect", "jdbc:mysql://localhost/mydb",
"--hadoop-home", "/home/yoonhok/development/hadoop-1.1.1",
"--table", "mytable",
"--export-dir", "/user/hive/warehouse/tbl_2",
"--username", "yoonhok",
"--password", "1234"
};
if (Sqoop.runTool(str) == 1) {
System.out.println("Error: sqoop-export failed.");
return false;
}
但它没有运行。
我有错误......
13/02/14 16:17:09 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
13/02/14 17:43:12 WARN sqoop.ConnFactory: $SQOOP_CONF_DIR has not been set in the environment. Cannot check for additional configuration.
13/02/14 16:17:09 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
13/02/14 16:17:09 INFO tool.CodeGenTool: Beginning code generation
13/02/14 16:17:09 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `tbl_2` AS t LIMIT 1
13/02/14 16:17:09 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `tbl_2` AS t LIMIT 1
13/02/14 16:17:09 INFO orm.CompilationManager: HADOOP_HOME is /home/yoonhok/development/hadoop-1.1.1
Note: /tmp/sqoop-yoonhok/compile/45dd1a113123726796a4ed4ce10c9110/tbl_2.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
13/02/14 16:17:10 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop-yoonhok/compile/45dd1a113123726796a4ed4ce10c9110/tbl_2.jar
13/02/14 16:17:10 INFO mapreduce.ExportJobBase: Beginning export of tbl_2
13/02/14 16:17:10 WARN mapreduce.ExportJobBase: Input path file:/user/hive/warehouse/tbl_2 does not exist
13/02/14 16:17:11 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
13/02/14 16:17:11 INFO mapred.JobClient: Cleaning up the staging area file:/tmp/hadoop-yoonhok/mapred/staging/yoonhok314601126/.staging/job_local_0001
13/02/14 16:17:11 ERROR security.UserGroupInformation: PriviledgedActionException as:yoonhok cause:org.apache.hadoop.mapreduce.lib.input.InvalidInputException: Input path does not exist: file:/user/hive/warehouse/tbl_2
13/02/14 16:17:11 ERROR tool.ExportTool: Encountered IOException running export job: org.apache.hadoop.mapreduce.lib.input.InvalidInputException: Input path does not exist: file:/user/hive/warehouse/tbl_2
我看到$SQOOP_CONF_DIR has not been set in the environment.
所以我加了
SQOOP_CONF_DIR=/home/yoonhok/development/sqoop-1.4.2.bin__hadoop-1.0.0/conf
在
/etc/环境
再试一次，但是出错了……
13/02/14 16:17:09 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
13/02/14 16:17:09 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
13/02/14 16:17:09 INFO tool.CodeGenTool: Beginning code generation
13/02/14 16:17:09 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `tbl_2` AS t LIMIT 1
13/02/14 16:17:09 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `tbl_2` AS t LIMIT 1
13/02/14 16:17:09 INFO orm.CompilationManager: HADOOP_HOME is /home/yoonhok/development/hadoop-1.1.1
Note: /tmp/sqoop-yoonhok/compile/45dd1a113123726796a4ed4ce10c9110/tbl_2.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
13/02/14 16:17:10 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop-yoonhok/compile/45dd1a113123726796a4ed4ce10c9110/tbl_2.jar
13/02/14 16:17:10 INFO mapreduce.ExportJobBase: Beginning export of tbl_2
13/02/14 16:17:10 WARN mapreduce.ExportJobBase: Input path file:/user/hive/warehouse/tbl_2 does not exist
13/02/14 16:17:11 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
13/02/14 16:17:11 INFO mapred.JobClient: Cleaning up the staging area file:/tmp/hadoop-yoonhok/mapred/staging/yoonhok314601126/.staging/job_local_0001
13/02/14 16:17:11 ERROR security.UserGroupInformation: PriviledgedActionException as:yoonhok cause:org.apache.hadoop.mapreduce.lib.input.InvalidInputException: Input path does not exist: file:/user/hive/warehouse/tbl_2
13/02/14 16:17:11 ERROR tool.ExportTool: Encountered IOException running export job: org.apache.hadoop.mapreduce.lib.input.InvalidInputException: Input path does not exist: file:/user/hive/warehouse/tbl_2
我认为 Export-dir 有问题。
我使用“/user/hive/warehouse/tbl_2”。
当我运行“hadoop fs -ls /user/hive/warehouse/”时，表“tbl_2”存在。
我认为
“输入路径不存在：文件:/user/hive/warehouse/tbl_2”不正常。
“输入路径不存在：hdfs:/user/hive/warehouse/tbl_2”没问题。
但我不知道该如何解决。
好的，就在我得到提示之前。
我编辑了 'export-dir'
--export-dir hdfs://localhost:9000/user/hive/warehouse/tbl_2
但是...这是错误... T.T
13/02/15 15:17:20 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
13/02/15 15:17:20 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
13/02/15 15:17:20 INFO tool.CodeGenTool: Beginning code generation
13/02/15 15:17:20 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `tbl_2` AS t LIMIT 1
13/02/15 15:17:20 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `tbl_2` AS t LIMIT 1
13/02/15 15:17:20 INFO orm.CompilationManager: HADOOP_HOME is /home/yoonhok/development/hadoop-1.1.1/libexec/..
Note: /tmp/sqoop-yoonhok/compile/697590ee9b90c022fb8518b8a6f1d86b/tbl_2.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
13/02/15 15:17:22 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop-yoonhok/compile/697590ee9b90c022fb8518b8a6f1d86b/tbl_2.jar
13/02/15 15:17:22 INFO mapreduce.ExportJobBase: Beginning export of tbl_2
13/02/15 15:17:22 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
13/02/15 15:17:23 INFO input.FileInputFormat: Total input paths to process : 1
13/02/15 15:17:23 INFO input.FileInputFormat: Total input paths to process : 1
13/02/15 15:17:23 INFO mapred.JobClient: Cleaning up the staging area file:/tmp/hadoop-yoonhok/mapred/staging/yoonhok922915382/.staging/job_local_0001
13/02/15 15:17:23 ERROR security.UserGroupInformation: PriviledgedActionException as:yoonhok cause:java.io.FileNotFoundException: File /user/hive/warehouse/tbl_2/000000_0 does not exist.
13/02/15 15:17:23 ERROR tool.ExportTool: Encountered IOException running export job: java.io.FileNotFoundException: File /user/hive/warehouse/tbl_2/000000_0 does not exist.
当我检查hdfs时，
hadoop fs -ls /user/hive/warehouse/tbl_2
或
hadoop fs -ls hdfs://localhost:9000/user/hive/warehouse/tbl_2
文件存在。
-rw-r--r-- 1 yoonhok 超级组 14029022 2013-02-15 12:16 /user/hive/warehouse/tbl_2/000000_0
我在终端的shell命令中尝试
sqoop-export --connect jdbc:mysql://localhost/detector --table tbl_2 --export-dir hdfs://localhost:9000/user/hive/warehouse/tbl_2 --username yoonhok --password 1234
成功了。
有什么问题？
我不知道。
你能帮我吗？
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