java.lang.RuntimeException: java.io.EOFException at org.apache.hadoop.io.WritableComparator.compare

java.lang.RuntimeException: java.io.EOFException
at org.apache.hadoop.io.WritableComparator.compare(WritableComparator.java:165)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.compare(MapTask.java:1268)
at org.apache.hadoop.util.QuickSort.sortInternal(QuickSort.java:74)
at org.apache.hadoop.util.QuickSort.sort(QuickSort.java:63)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1600)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1489)
at org.apache.hadoop.mapred.MapTask$NewOutputCollector.close(MapTask.java:723)
at org.apache.hadoop.mapred.MapTask.closeQuietly(MapTask.java:2019)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:797)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
at org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:243)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.EOFException
at java.io.DataInputStream.readInt(DataInputStream.java:392)
at com.zx.sorttemperature.KeyPair.readFields(KeyPair.java:57)
at org.apache.hadoop.io.WritableComparator.compare(WritableComparator.java:158)
... 15 more
[18 21:50:07,250 INFO ] [Thread-19] mapred.LocalJobRunner - map task executor complete.
[18 21:50:07,281 WARN ] [Thread-19] mapred.LocalJobRunner - job_local143809563_0001
java.lang.Exception: java.lang.RuntimeException: java.io.EOFException
at org.apache.hadoop.mapred.LocalJobRunner$Job.runTasks(LocalJobRunner.java:462)
at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:522)
Caused by: java.lang.RuntimeException: java.io.EOFException
at org.apache.hadoop.io.WritableComparator.compare(WritableComparator.java:165)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.compare(MapTask.java:1268)
at org.apache.hadoop.util.QuickSort.sortInternal(QuickSort.java:74)
at org.apache.hadoop.util.QuickSort.sort(QuickSort.java:63)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1600)
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1489)
at org.apache.hadoop.mapred.MapTask$NewOutputCollector.close(MapTask.java:723)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:793)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
at org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:243)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.EOFException
at java.io.DataInputStream.readInt(DataInputStream.java:392)
at com.zx.sorttemperature.KeyPair.readFields(KeyPair.java:57)

at org.apache.hadoop.io.WritableComparator.compare(WritableComparator.java:158)


错误:序列化与反序列号错误,内容未匹配,当读取第一个时,已读取到文件末尾,就抛出异常
         序列号时一定要调用相应的write()方法

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