我在本地安装了mysql,也在本地安装了sqoop来连接hive来提取数据
sqoop list-databases --connect jdbc:mysql://localhost/db --username db1
它回来了
16/05/13 21:49:49 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6
16/05/13 21:49:50 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset.
信息模式搜索测试
2) 我想从hive表到mysql表获取数据,所以我尝试了
sqoop export --connect jdbc:mysql://localhost/db --username db1 --table search \
--driver com.mysql.jdbc.Driver \
--export-dir /projects/Tool_DB/search/dt=20160403/region=0 \
--input-fields-terminated-by '\001'
显示错误
16/05/13 21:48:24 INFO mapreduce.Job: Running job: job_1459561405699_1417866
16/05/13 21:48:43 INFO mapreduce.Job: Job job_1459561405699_1417866 running in uber mode : false
16/05/13 21:48:43 INFO mapreduce.Job: map 0% reduce 0%
16/05/13 21:48:52 INFO mapreduce.Job: Task Id : attempt_1459561405699_1417866_m_000001_0, Status : FAILED
Error: java.io.IOException: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at org.apache.sqoop.mapreduce.ExportOutputFormat.getRecordWriter(ExportOutputFormat.java:79)
at org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector.<init>(MapTask.java:647)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:767)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1679)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1117)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:350)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2408)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2445)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2230)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:813)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
3) 我也试过
sqoop export --connect jdbc:mysql://localhost/db --username db1 --table search \
--driver com.mysql.jdbc.Driver \
--hcatalog-database db
--hcatalog-table search
和显示错误
16/05/13 21:53:08 INFO mapreduce.ExportJobBase: Configuring HCatalog for export job
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hive/hcatalog/mapreduce/HCatOutputFormat
at org.apache.sqoop.mapreduce.ExportJobBase.runExport(ExportJobBase.java:420)
at org.apache.sqoop.manager.SqlManager.exportTable(SqlManager.java:912)
at org.apache.sqoop.tool.ExportTool.exportTable(ExportTool.java:81)
at org.apache.sqoop.tool.ExportTool.run(ExportTool.java:100)
at org.apache.sqoop.Sqoop.run(Sqoop.java:143)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:179)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:218)
at org.apache.sqoop.Sqoop.runTool(Sqoop.java:227)
at org.apache.sqoop.Sqoop.main(Sqoop.java:236)
Caused by: java.lang.ClassNotFoundException: org.apache.hive.hcatalog.mapreduce.HCatOutputFormat
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
有什么建议或提示来解决这个错误吗?
1条答案
按热度按时间q3qa4bjr1#
你面对这个问题是因为
HCAT_HOME
未设置路径。请设置路径并尝试。
例如: