I'm facing this error message whenever i try to crawl using Nutch 0.9..
i have downloaded the patch for this, but i dont know how to install it.

Exception in thread "main" java.io.IOException: Job failed!
    at org.apache.hadoop.mapred.JobClient.runJob (JobClient.java:604)
    at
org.apache.nutch.indexer.DeleteDuplicates.dedup(DeleteDuplicates.java
:439)
    at org.apache.nutch.crawl.Crawl.main (Crawl.java:135)
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