title: Filter Issue in Spring Integration
body: <p>I need to transfer files from SFTP server A to SFTP Server B.I am using Spring Integration to do this and  implemented a SpringBoot application that is using inboundchanneladapter to download the file from SFTP server A to the local file system and OutputChanneladapter to upload a file from the local server to SFTP server B</p>
  
  <p>SFTP Server A(Source) > Local File System > SFTP Server B(Destination) </p>
  
  <p>I don't have permission to delete files in SFTP server A but I need to delete a file in the local file system after the file has been transferred to Server B (because the size of the local file system will keep on increasing ) </p>
  
  <p><strong>Issue</strong>
  As soon File is deleted from local file system .Spring Integration again brings the file back from SFTP server A.If I don't delete the file from local file system then it works fine . I don't want to keep the file in the local file system because of the size issues in future. </p>
  
  <p>Does Spring Integration metadata is deleted when files are deleted from the local file system? I have used  AcceptOnceFileListFilter but it is not fixing the issue.PLease suggest </p>