我正在使用Hadoop-1.2.1和Sqoop-1.4.6。我使用sqoop使用该命令从数据库meshtree
导入表test
到HDFS:使用Sqoop将数据从mysql导入HDFS
`sqoop import --connect jdbc:mysql://localhost/meshtree --username user --password password --table test`
但是,它显示了这个错误:
17/06/17 18:15:21 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
17/06/17 18:15:21 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
17/06/17 18:15:21 INFO tool.CodeGenTool: Beginning code generation
17/06/17 18:15:22 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM `test` AS t LIMIT 1
17/06/17 18:15:22 INFO orm.CompilationManager: HADOOP_HOME is /home/student /Installations/hadoop-1.2.1/libexec/..
Note: /tmp/sqoop-student/compile/6bab6efaa3dc60e67a50885b26c1d14b/test.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
17/06/17 18:15:24 ERROR orm.CompilationManager: Could not rename /tmp/sqoop- student/compile/6bab6efaa3dc60e67a50885b26c1d14b/test.java to /home/student /Installations/hadoop-1.2.1/./test.java
org.apache.commons.io.FileExistsException: Destination '/home/student /Installations/hadoop-1.2.1/./test.java' already exists
at org.apache.commons.io.FileUtils.moveFile(FileUtils.java:2378)
at org.apache.sqoop.orm.CompilationManager.compile(CompilationManager.java:227)
at org.apache.sqoop.tool.CodeGenTool.generateORM(CodeGenTool.java:83)
at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:367)
at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:453)
at org.apache.sqoop.Sqoop.run(Sqoop.java:145)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:181)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:220)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:229)
at org.apache.sqoop.Sqoop.main(Sqoop.java:238)
at com.cloudera.sqoop.Sqoop.main(Sqoop.java:57)
17/06/17 18:15:24 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop- student/compile/6bab6efaa3dc60e67a50885b26c1d14b/test.jar
17/06/17 18:15:24 WARN manager.MySQLManager: It looks like you are importing from mysql.
17/06/17 18:15:24 WARN manager.MySQLManager: This transfer can be faster! Use the --direct
17/06/17 18:15:24 WARN manager.MySQLManager: option to exercise a MySQL- specific fast path.
17/06/17 18:15:24 INFO manager.MySQLManager: Setting zero DATETIME behavior to convertToNull (mysql)
17/06/17 18:15:24 INFO mapreduce.ImportJobBase: Beginning import of test
17/06/17 18:15:27 INFO mapred.JobClient: Cleaning up the staging area hdfs://localhost:9000/home/student/Installations/hadoop-1.2.1/data/mapred /staging/student/.staging/job_201706171814_0001
17/06/17 18:15:27 ERROR security.UserGroupInformation: PriviledgedActionException as:student cause:org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory test already exists
17/06/17 18:15:27 ERROR tool.ImportTool: Encountered IOException running import job: org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory test already exists
at org.apache.hadoop.mapreduce.lib.output.FileOutputFormat.checkOutputSpecs(FileO utputFormat.java:137)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:973)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:936)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:936)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:550)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:580)
at org.apache.sqoop.mapreduce.ImportJobBase.runJob(ImportJobBase.java:141)
at org.apache.sqoop.mapreduce.ImportJobBase.runImport(ImportJobBase.java:201)
at org.apache.sqoop.manager.SqlManager.importTable(SqlManager.java:413)
at org.apache.sqoop.manager.MySQLManager.importTable(MySQLManager.java:97)
at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:380)
at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:453)
at org.apache.sqoop.Sqoop.run(Sqoop.java:145)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:181)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:220)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:229)
at org.apache.sqoop.Sqoop.main(Sqoop.java:238)
at com.cloudera.sqoop.Sqoop.main(Sqoop.java:57)
有什么办法弄清楚这个问题?
谢谢你的解释。我阅读了Sqoop文档,它非常有帮助,之前的错误已得到解决。但是还有另一个出现的错误。你能帮我解决吗?错误:线程中的异常“main”java.lang.IncompatibleClassChangeError:Found class org.apache.hadoop.mapreduce.JobContext,but expected expected \t at org.apache.sqoop.config.ConfigurationHelper.getJobNumMaps(ConfigurationHelper.java :65)' – Christine
您正在使用Hadoop 1.x,但看起来您的Sqoop是使用Hadoop 2.x编译的。请使用Hadoop 1.x编译您的Sqoop或下载与Hadoop 1.x兼容的Sqoop的较低版本。 –
谢谢您的回复,我试着下载较低版本的sqoop(sqoop-1.4.1)。但是,它仍然不适用于我。它显示此错误:'错误security.UserGroupInformation:PriviledgedActionException:连接被拒绝 错误tool.ImportTool:遇到IOException运行导入作业:连接被拒绝' – Christine