Nifi on Docker fails due to use of NIO Files.getFileStore on OverlayFS

Whenever a component, build or test is running having Files.getFileStore, java is throwing exception and the process fails. PFB:

java> import java.nio.file.*;
Imported java.nio.file.*
java> Path p= FileSystems.getDefault().getPath("/home/puspendu/src/nifi","LICENSE")
java.nio.file.Path p = /home/puspendu/src/nifi/LICENSE
java> Files.getFileStore(p);
java.io.IOException: Mount point not found

An active bug is there on JDK side https://bugs.openjdk.java.net/browse/JDK-8165852.

The same issue is present with btrfs .
For Nifi, either

• we should halt support for Docker container unless that issue is getting fixed or
• need to modify our code and use java.io.File wherever needed or
• we can just ignore assuming none else is using overlayfs2 or
• we can explicitly state it as a known issue and workaround could be using aufs as storage driver for Docker, in corresponding nifi user manual.