MR1 run的时候报错了，查看fs上该input文件已经存在

java.io.IOException: No input paths specified in job

at org.apache.hadoop.mapreduce.lib.input.FileInputFormat.listStatus(FileInputFormat.java:238)

at org.apache.hadoop.mapreduce.lib.input.FileInputFormat.getSplits(FileInputFormat.java:385)

at org.apache.hadoop.mapreduce.JobSubmitter.writeNewSplits(JobSubmitter.java:597)

at org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:614)

at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:492)

at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1296)

at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1293)

at java.security.AccessController.doPrivileged(Native Method)

at javax.security.auth.Subject.doAs(Subject.java:422)

at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)

at org.apache.hadoop.mapreduce.Job.submit(Job.java:1293)

at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1314)

at com.lt.hadoop.step1.MR1.run(MR1.java:53)

at com.lt.hadoop.step1.MR1.main(MR1.java:69)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)