当我执行此命令行时：

ahmed@ubuntu:~/apache-nutch-1.9/bin$ ./crawl seeds fir localhost:8983/solr 1

我在执行结束时遇到了一个错误异常：

Indexer: java.io.IOException: Job failed!

at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1357)
at org.apache.nutch.indexer.IndexingJob.index(IndexingJob.java:114)
at org.apache.nutch.indexer.IndexingJob.run(IndexingJob.java:176)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.nutch.indexer.IndexingJob.main(IndexingJob.java:186)

能帮我个忙吗。