已經有一段時間了，每天晚上的作業都很好。但是，最近幾天它推遲了幾個小時，而且在第一步運行達一半時，就會有一個類沒有找到的錯誤。這個錯誤我貼在了下面。它沒有說具體是哪個類沒有找到。
我們用的是Hadoop 1.0.3。非常感謝你們的幫助，謝謝。
Task attempt_201308210619_0001_r_000000_2 failed to report status for 600 seconds. Killing!
Task attempt_201308210619_0001_r_000000_2 failed to report status for 602 seconds. Killing!
attempt_201308210619_0001_r_000000_2: Exception in thread "IPC Client (47) connection to /127.0.0.1:60617 from job_201308210619_0001" java.lang.RuntimeException: readObject can't find class
attempt_201308210619_0001_r_000000_2: at org.apache.hadoop.io.ObjectWritable.readObject(ObjectWritable.java:185)
attempt_201308210619_0001_r_000000_2: at org.apache.hadoop.io.ObjectWritable.readFields(ObjectWritable.java:66)
attempt_201308210619_0001_r_000000_2: at org.apache.hadoop.ipc.Client$Connection.receiveResponse(Client.java:814)
attempt_201308210619_0001_r_000000_2: at org.apache.hadoop.ipc.Client$Connection.run(Client.java:749)
attempt_201308210619_0001_r_000000_2: Caused by: java.lang.ClassNotFoundException:
attempt_201308210619_0001_r_000000_2: at java.lang.Class.forName0(Native Method)
attempt_201308210619_0001_r_000000_2: at java.lang.Class.forName(Class.java:270)
attempt_201308210619_0001_r_000000_2: at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:820)
attempt_201308210619_0001_r_000000_2: at org.apache.hadoop.io.ObjectWritable.readObject(ObjectWritable.java:183)
attempt_201308210619_0001_r_000000_2: ... 3 more
Exception in thread "main" java.io.IOException: Job failed!
at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1320)
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標籤：AWS
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