title: Hadoop - Execute script when data arrives in hdfs
body: <p>Is there a tool in the Hadoop ecosystem which can actually know if new data has been added to the HDFS File System ?</p>
  
  <p>Actually I want to execute remotely a sqoop import job from an external database (no merge, only new table). Then when this data is written in HDFS, it would execute a spark script that would process with the newly data added and do some stuffs.</p>
  
  <p>Is there any feature in Hadoop that does this kind of job ?</p>
  
  <p>I could totally execute the spark script after the sqoop import job is done, but I would like to know if such feature exists and haven't find any yet.</p>
  
  <p>Thanks in advance.</p>