使用nutch爬取时，报错，以下是日志，哪位大神给我解答下
java.lang.OutOfMemoryError: unable to create new native thread
at java.lang.Thread.start0(Native Method)
at java.lang.Thread.start(Thread.java:597)
at java.util.concurrent.ThreadPoolExecutor.addIfUnderMaximumPoolSize(ThreadPoolExecutor.java:727)
at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:657)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:92)
at org.apache.nutch.parse.ParseUtil.runParser(ParseUtil.java:159)
at org.apache.nutch.parse.ParseUtil.parse(ParseUtil.java:93)
at org.apache.nutch.parse.ParseSegment.map(ParseSegment.java:97)
at org.apache.nutch.parse.ParseSegment.map(ParseSegment.java:44)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:358)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:177)
这是内存溢出导致的，主机的内存配置是什么？