Already has a period of time, every night work is very good, but, in recent days it has delayed for a few hours, and the first step in running up to half hour, there will be a class not found error, the error I posted in the following, it didn't say exactly which class is not found,
We use a Hadoop 1.0.3, thank you very much for your help, thank you,
Task attempt_201308210619_0001_r_000000_2 failed to report the status for 600 seconds. This time!
Task attempt_201308210619_0001_r_000000_2 failed to report the status for 602 seconds. This time!
Attempt_201308210619_0001_r_000000_2: Exception in the thread "IPC Client (47) connection to/127.0.0.1:60617 from job_201308210619_0001" Java. Lang. RuntimeException: readObject can 't find the 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. The Client $Connection. ReceiveResponse (814). The Client Java:
Attempt_201308210619_0001_r_000000_2: at org. Apache. Hadoop. Ipc. The Client $Connection. The run (749). The Client Java:
Attempt_201308210619_0001_r_000000_2: under 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 (270) Class. Java:
Attempt_201308210619_0001_r_000000_2: at org. Apache. Hadoop. Conf. Configuration. GetClassByName (820) Configuration. Java:
Attempt_201308210619_0001_r_000000_2: at org. Apache. Hadoop. IO. ObjectWritable. ReadObject (ObjectWritable. Java: 183)
Attempt_201308210619_0001_r_000000_2:... 3 more
The Exception in the thread "main" Java. IO. IOException: Job failed!
At org, apache hadoop. Mapred. JobClient. RunJob (JobClient. Java: 1320)