当我执行这个命令行时：
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)
我能帮忙吗？