从 Hadoop 中删除文件/文件夹
问题描述：
我在分析日志文件的数据管道内运行 EMR 活动，当我的管道失败时出现以下错误:
I'm running an EMR Activity inside a Data Pipeline analyzing log files and I get the following error when my Pipeline fails:
Exception in thread "main" org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory hdfs://10.208.42.127:9000/home/hadoop/temp-output-s3copy already exists
at org.apache.hadoop.mapred.FileOutputFormat.checkOutputSpecs(FileOutputFormat.java:121)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:944)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:905)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1132)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:905)
at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:879)
at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1316)
at com.valtira.datapipeline.stream.CloudFrontStreamLogProcessors.main(CloudFrontStreamLogProcessors.java:216)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.RunJar.main(RunJar.java:187)
如何从 Hadoop 中删除该文件夹?
How can I delete that folder from Hadoop?
答
我联系了 AWS 支持，似乎问题在于我正在分析的日志文件非常大，并且造成了内存问题.我在 EMRCluster 部分添加了我的管道定义 "masterInstanceType" : "m1.xlarge" 并且它起作用了.
I contacted AWS support and it seemed that the problem was that the log files I was analyzing were very big and that created an issue with memory. I added to my pipeline definition "masterInstanceType" : "m1.xlarge" in the EMRCluster section and it worked.