MapReduce问题，连接问题

在eclipse执行job时出现以下现象
197203 2014-05-06 18:20:38,032 [IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop] DEBUG org.apache.hadoop.ipc.Client  - IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop got value #560
197203 2014-05-06 18:20:38,032 [main] DEBUG org.apache.hadoop.ipc.ProtobufRpcEngine  - Call: getJobReport took 2ms
198208 2014-05-06 18:20:39,037 [main] DEBUG org.apache.hadoop.security.UserGroupInformation  - PrivilegedAction as:hadoop (auth:SIMPLE) from:org.apache.hadoop.mapreduce.Job.getTaskCompletionEvents(Job.java:665)
198208 2014-05-06 18:20:39,037 [IPC Parameter Sending Thread #0] DEBUG org.apache.hadoop.ipc.Client  - IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop sending #561
198211 2014-05-06 18:20:39,040 [IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop] DEBUG org.apache.hadoop.ipc.Client  - IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop got value #561
198211 2014-05-06 18:20:39,040 [main] DEBUG org.apache.hadoop.ipc.ProtobufRpcEngine  - Call: getTaskAttemptCompletionEvents took 3ms
198211 2014-05-06 18:20:39,040 [main] DEBUG org.apache.hadoop.security.UserGroupInformation  - PrivilegedAction as:hadoop (auth:SIMPLE) from:org.apache.hadoop.mapreduce.Job.updateStatus(Job.java:311)
198212 2014-05-06 18:20:39,041 [IPC Parameter Sending Thread #0] DEBUG org.apache.hadoop.ipc.Client  - IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop sending #562
198214 2014-05-06 18:20:39,043 [IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop] DEBUG org.apache.hadoop.ipc.Client  - IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop got value #562
198214 2014-05-06 18:20:39,043 [main] DEBUG org.apache.hadoop.ipc.ProtobufRpcEngine  - Call: getJobReport took 3ms
198214 2014-05-06 18:20:39,043 [main] DEBUG org.apache.hadoop.security.UserGroupInformation  - PrivilegedAction as:hadoop (auth:SIMPLE) from:org.apache.hadoop.mapreduce.Job.updateStatus(Job.java:311)
198215 2014-05-06 18:20:39,044 [IPC Parameter Sending Thread #0] DEBUG org.apache.hadoop.ipc.Client  - IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop sending #563
198217 2014-05-06 18:20:39,046 [IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop] DEBUG org.apache.hadoop.ipc.Client  - IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop got value #563
198217 2014-05-06 18:20:39,046 [main] DEBUG org.apache.hadoop.ipc.ProtobufRpcEngine  - Call: getJobReport took 3ms
199220 2014-05-06 18:20:40,049 [main] DEBUG org.apache.hadoop.security.UserGroupInformation  - PrivilegedAction as:hadoop (auth:SIMPLE) from:org.apache.hadoop.mapreduce.Job.getTaskCompletionEvents(Job.java:665)
199221 2014-05-06 18:20:40,050 [IPC Parameter Sending Thread #0] DEBUG org.apache.hadoop.ipc.Client  - IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop sending #564
199223 2014-05-06 18:20:40,052 [IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop] DEBUG org.apache.hadoop.ipc.Client  - IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop got value #564
199223 2014-05-06 18:20:40,052 [main] DEBUG org.apache.hadoop.ipc.ProtobufRpcEngine  - Call: getTaskAttemptCompletionEvents took 2ms
199224 2014-05-06 18:20:40,053 [main] DEBUG org.apache.hadoop.security.UserGroupInformation  - PrivilegedAction as:hadoop (auth:SIMPLE) from:org.apache.hadoop.mapreduce.Job.updateStatus(Job.java:311)
199224 2014-05-06 18:20:40,053 [IPC Parameter Sending Thread #0] DEBUG org.apache.hadoop.ipc.Client  - IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop sending #565
199226 2014-05-06 18:20:40,055 [IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop] DEBUG org.apache.hadoop.ipc.Client  - IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop got value #565
199226 2014-05-06 18:20:40,055 [main] DEBUG org.apache.hadoop.ipc.ProtobufRpcEngine  - Call: getJobReport took 2ms
199227 2014-05-06 18:20:40,056 [main] DEBUG org.apache.hadoop.security.UserGroupInformation  - PrivilegedAction as:hadoop (auth:SIMPLE) from:org.apache.hadoop.mapreduce.Job.updateStatus(Job.java:311)
199227 2014-05-06 18:20:40,056 [IPC Parameter Sending Thread #0] DEBUG org.apache.hadoop.ipc.Client  - IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop sending #566
199230 2014-05-06 18:20:40,059 [IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop] DEBUG org.apache.hadoop.ipc.Client  - IPC Client (3445873) connection to hadoop3/192.168.1.246:52343 from hadoop got value #566
199230 2014-05-06 18:20:40,059 [main] DEBUG org.apache.hadoop.ipc.ProtobufRpcEngine  - Call: getJobReport took 3ms
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版本多少，几个节点，实现什么。说说你在什么情况下发生这个错误的，把你大体情况说一下。还有你的代码贴出来。