当另一个Java程序创建文件时，Java文件系统WatchService无法拾取文件

Question

I have implemented WatchService on file system directory. There is another java process which writes to this directory. When i manually create a file in directory, WatchService is able to pick that up but when another java process creates a file in that directory, WatchService is not able to pick that up. I'm using below sample code to write to a file.

 com.google.common.io.Files.write("test content".getBytes(), new File("/var/tmp/dir/1.txt"));

Answer 1

The problem was with the mounted NFS file system. Had to use Apache File Watcher API to resolve the issue.