運(yùn)行worldcount 程序一直報(bào)錯(cuò)。說輸出目錄已經(jīng)存在！一開始的路徑是/test/output 報(bào)錯(cuò)/test/output already exists，我刪除了output 又報(bào)錯(cuò)：/test already exists，，然后我新建了一個(gè)newoutput 又報(bào)錯(cuò) /test/newouput already exists?！，F(xiàn)在我把輸出路徑放到根目錄下還是already exists?。?！這個(gè)是什么情況？？？Exception in thread "main" org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory file:/ already existsat org.apache.hadoop.mapreduce.lib.output.FileOutputFormat.checkOutputSpecs(FileOutputFormat.java:146)at org.apache.hadoop.mapreduce.JobSubmitter.checkSpecs(JobSubmitter.java:266)at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:139)at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1290)at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1287)at java.security.AccessController.doPrivileged(Native Method)at javax.security.auth.Subject.doAs(Unknown Source)