nutch job failed

[aiwangyanhui]

最近使用网上的bat代码运行nutch，结果出现如下错误：
2011-07-03 17:32:26,218 INFO crawl.Injector - Injector: Converting injected urls to crawl db entries.
2011-07-03 17:32:26,328 WARN mapred.JobClient - Use GenericOptionsParser for parsing the arguments. Applications should implement Tool for the same.
2011-07-03 17:32:27,343 WARN mapred.LocalJobRunner - job_local_0001
java.lang.OutOfMemoryError: Java heap space
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:498)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:138)
求高人指点。