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当我在较大的数据集上运行作业时,大量映射器/缩减器失败导致整个作业崩溃。以下是我在许多映射器上看到的错误:在hadoop上级联2.0.0作业失败FileNotFoundException job.split
java.io.FileNotFoundException: File does not exist: /mnt/var/lib/hadoop/tmp/mapred/staging/hadoop/.staging/job_201405050818_0001/job.split
at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.openInfo(DFSClient.java:1933)
at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.<init>(DFSClient.java:1924)
at org.apache.hadoop.hdfs.DFSClient.open(DFSClient.java:608)
at org.apache.hadoop.hdfs.DistributedFileSystem.open(DistributedFileSystem.java:154)
at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:429)
at org.apache.hadoop.mapred.MapTask.getSplitDetails(MapTask.java:385)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:417)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:377)
at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
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:1132)
at org.apache.hadoop.mapred.Child.main(Child.java:249)
有人能解决这个问题吗?我看到另一个遇到同样痛苦的人(here),可惜他无法及时得救。