eclipse中运行mapreduce 异常

eclipse中运行mapreduce 异常

描述：内存溢出，堆不够用

异常：

14/03/26 23:11:36 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 14/03/26 23:11:36 WARN mapred.JobClient: No job jar file set.  User classes may not be found. See JobConf(Class) or JobConf#setJar(String). 14/03/26 23:11:36 INFO input.FileInputFormat: Total input paths to process : 2 14/03/26 23:11:36 WARN snappy.LoadSnappy: Snappy native library not loaded 14/03/26 23:11:37 INFO mapred.JobClient: Running job: job_local_0001 14/03/26 23:11:37 INFO mapred.Task:  Using ResourceCalculatorPlugin : null 14/03/26 23:11:37 INFO mapred.MapTask: io.sort.mb = 100 14/03/26 23:11:37 WARN mapred.LocalJobRunner: job_local_0001 java.lang.OutOfMemoryError: Java heap space at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:949) at org.apache.hadoop.mapred.MapTask$NewOutputCollector.<init>(MapTask.java:674) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:756) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370) at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:212) 14/03/26 23:11:38 INFO mapred.JobClient:  map 0% reduce 0% 14/03/26 23:11:38 INFO mapred.JobClient: Job complete: job_local_0001 14/03/26 23:11:38 INFO mapred.JobClient: Counters: 0
解决办法: 增大堆内存 ，右键run as -> run configurations  参数：-Xms512M -Xmx1024M 大小根据自己情况调整