Nutch 1.4 运行爬虫索引网站时报错。

命令如下：

Administrator@f523540 ~
$ cd  /cygdrive/d/nutch/apache-nutch-1.4-bin/runtime/local/

Administrator@f523540 /cygdrive/d/nutch/apache-nutch-1.4-bin/runtime/local
$ ./bin/nutch crawl urls -dir crawl -topN 5  -depth 3
cygpath: can't convert empty path
solrUrl is not set, indexing will be skipped...
crawl started in: crawl
rootUrlDir = urls
threads = 10
depth = 3
solrUrl=null
topN = 5
Injector: starting at 2012-06-17 13:47:45
Injector: crawlDb: crawl/crawldb
Injector: urlDir: urls
Injector: Converting injected urls to crawl db entries.
Exception in thread "main" java.io.IOException: Job failed!
        at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1252)
        at org.apache.nutch.crawl.Injector.inject(Injector.java:217)
        at org.apache.nutch.crawl.Crawl.run(Crawl.java:127)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
        at org.apache.nutch.crawl.Crawl.main(Crawl.java:55)

　环境：cygwin  windows xp  java 1.6   nutch 1.4。不知道哪位有没有遇到过此问题，期待您的回答！