Apache Sqoop指南:数据迁移与大数据决策

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Apache Sqoop Cookbook 是一本由 Kathleen Ting 和 Jarek Jarcec Cecho 合著的专业书籍,它专注于 Apache Sqoop 的实践应用。Sqoop 是一个强大的工具,专为在 Hadoop 集群与传统的关系型数据库(如 MySQL、Oracle 或 Postgres 等)之间进行数据迁移而设计。该书深入讲解了如何有效地将结构化数据从关系型数据库导入 Hadoop Distributed File System (HDFS),以及如何反之将 HDFS 中的数据导出回这些数据库,这对于大数据处理和分析至关重要。 书中涵盖了以下几个关键知识点: 1. **数据收集与管理**: Sqoop 提供了一种方法,帮助用户从不同类型的源数据库获取数据,并通过标准接口(如 JDBC)进行连接。作者会详细介绍如何配置和优化 Sqoop 的连接参数,以确保高效的数据迁移。 2. **云存储与计算**:随着云计算的发展,Sqoop 可以无缝地与云存储服务集成,如 Amazon S3 或 Google Cloud Storage。书中会讨论如何利用这些廉价且灵活的存储选项,以及如何在云环境中执行大规模数据迁移。 3. **数据分析与可视化**: Sqoop 能够支持大数据处理后,将其转化为可供分析的数据集。作者可能探讨了如何使用其他工具(如 Hadoop Ecosystem 的 MapReduce 或 Spark)对导入的数据进行清洗、转换和分析,以及如何结合可视化技术(如 Tableau 或 D3.js)来呈现复杂数据的直观洞察。 4. **数据驱动决策**:通过本书,读者可以学习如何利用 Sqoop 将数据转化为有价值的商业洞见,无论是创新产品开发、客户行为理解,还是在竞争中取得数据优势。 5. **实战教程与案例**:书中包含丰富的实例和实用的步骤,帮助读者掌握 Sqoop 的实际操作技巧,包括数据导入/导出的最佳实践、性能调优以及错误排查。 6. **版权信息**:该书版权由 O'Reilly Media 所有,强调了数据转化为决策的重要性,并推荐读者访问 O'Reilly's Strata 服务获取更多关于大数据管理和分析的资源。 Apache Sqoop Cookbook 是一本深入浅出的指南,适合数据工程师、大数据分析师或任何希望有效利用关系型数据库和 Hadoop 的专业人士。通过阅读这本书,读者不仅能掌握 Sqoop 技术,还能提升自己在数据驱动业务决策中的能力。

2023-06-10 06:10:14,356 INFO mapreduce.Job: Job job_1686300831839_0056 failed with state FAILED due to: Task failed task_1686300831839_0056_m_000001 Job failed as tasks failed. failedMaps:1 failedReduces:0 killedMaps:0 killedReduces: 0 2023-06-10 06:10:14,536 INFO mapreduce.Job: Counters: 9 Job Counters Failed map tasks=1 Killed map tasks=3 Launched map tasks=4 Data-local map tasks=4 Total time spent by all maps in occupied slots (ms)=20374 Total time spent by all reduces in occupied slots (ms)=0 Total time spent by all map tasks (ms)=20374 Total vcore-milliseconds taken by all map tasks=20374 Total megabyte-milliseconds taken by all map tasks=20862976 2023-06-10 06:10:14,561 WARN mapreduce.Counters: Group FileSystemCounters is deprecated. Use org.apache.hadoop.mapreduce.FileSystemCounter instead 2023-06-10 06:10:14,566 INFO mapreduce.ExportJobBase: Transferred 0 bytes in 19.7479 seconds (0 bytes/sec) 2023-06-10 06:10:14,582 WARN mapreduce.Counters: Group org.apache.hadoop.mapred.Task$Counter is deprecated. Use org.apache.hadoop.mapreduce.TaskCounter instead 2023-06-10 06:10:14,582 INFO mapreduce.ExportJobBase: Exported 0 records. 2023-06-10 06:10:14,582 ERROR mapreduce.ExportJobBase: Export job failed! 2023-06-10 06:10:14,585 ERROR tool.ExportTool: Error during export: Export job failed! at org.apache.sqoop.mapreduce.ExportJobBase.runExport(ExportJobBase.java:445) at org.apache.sqoop.manager.SqlManager.exportTable(SqlManager.java:931) at org.apache.sqoop.tool.ExportTool.exportTable(ExportTool.java:80) at org.apache.sqoop.tool.ExportTool.run(ExportTool.java:99) at org.apache.sqoop.Sqoop.run(Sqoop.java:147) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76) at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183) at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234) at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243) at org.apache.sqoop.Sqoop.main(Sqoop.java:252)

2023-06-11 上传

ERROR sqoop.Sqoop: Got exception running Sqoop: java.lang.NullPointerException java.lang.NullPointerException at org.json.JSONObject.<init>(JSONObject.java:144) at org.apache.sqoop.util.SqoopJsonUtil.getJsonStringforMap(SqoopJsonUtil.java:43) at org.apache.sqoop.SqoopOptions.writeProperties(SqoopOptions.java:867) at org.apache.sqoop.mapreduce.JobBase.putSqoopOptionsToConfiguration(JobBase.java:393) at org.apache.sqoop.mapreduce.JobBase.createJob(JobBase.java:379) at org.apache.sqoop.mapreduce.ImportJobBase.runImport(ImportJobBase.java:255) at org.apache.sqoop.manager.SqlManager.importQuery(SqlManager.java:747) at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:536) at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:633) at org.apache.sqoop.Sqoop.run(Sqoop.java:146) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76) at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:182) at org.apache.sqoop.Sqoop.runTool(Sqoop.java:233) at org.apache.sqoop.Sqoop.runTool(Sqoop.java:242) at org.apache.sqoop.Sqoop.main(Sqoop.java:251) Log Type: stdout Log Upload Time: Mon Jul 24 10:47:38 +0800 2023 Log Length: 74530 Showing 4096 bytes of 74530 total. Click here for the full log. 35517561_3806_01_000001: PRELAUNCH_OUT=/yarn/container-logs/application_1683335517561_3806/container_1683335517561_3806_01_000001/prelaunch.out: NM_AUX_SERVICE_mapreduce_shuffle=AAA0+gAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=: NM_PORT=8041: HADOOP_YARN_HOME=/opt/cloudera/parcels/CDH-6.3.2-1.cdh6.3.2.p0.1605554/lib/hadoop-yarn: USER=admin: CLASSPATH=/yarn/nm/usercache/admin/appcache/application_1683335517561_3806/container_1683335517561_3806_01_000001:/yarn/nm/usercache/admin/appcache/application_1683335517561_3806/container_1683335517561_3806_01_000001/*:/etc/hadoop/conf.cloudera.yarn:/opt/cloudera/parcels/CDH-6.3.2-1.cdh6.3.2.p0.1605554/lib/hadoop/*:/opt/cloudera/parcels/CDH-6.3.2-1.cdh6.3.2.p0.1605554/lib/hadoop/lib/*:/opt/cloudera/parcels/CDH-6.3.2-1.cdh6.3.2.p0.1605554/lib/hadoop-hdfs/*:/opt/cloudera/parcels/CDH-6.3.2-1.cdh6.3.2.p0.1605554/lib/hadoop-hdfs/lib/*:/opt/cloudera/parcels/CDH-6.3.2-1.cdh6.3.2.p0.1605554/lib/hadoop-yarn/*:/opt/cloudera/parcels/CDH-6.3.2-1.cdh6.3.2.p0.1605554/lib/hadoop-yarn/lib/*:: PRELAUNCH_ERR=/yarn/container-logs/application_1683335517561_3806/container_1683335517561_3806_01_000001/prelaunch.err: HADOOP_TOKEN_FILE_LOCATION=/yarn/nm/usercache/admin/appcache/application_1683335517561_3806/container_1683335517561_3806_01_000001/container_tokens: LOCAL_USER_DIRS=/yarn/nm/usercache/admin/: OOZIE_ACTION_CONF_XML=/yarn/nm/usercache/admin/appcache/application_1683335517561_3806/container_1683335517561_3806_01_000001/action.xml: SHLVL=2: HOME=/home/: CONTAINER_ID=container_1683335517561_3806_01_000001: MALLOC_ARENA_MAX=4:怎么回事

2023-07-25 上传