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https://issues.apache.org/jira/browse/NIFI-3579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15906441#comment-15906441
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Puspendu Banerjee commented on NIFI-3579:
-----------------------------------------
@mosermw We may get different result due to substituted drive, partition
configuration and a lot more known or unknown reasons.
Historically, java nio has left a trail of a lot of issues/JDK bugs, ex:
- https://bugs.openjdk.java.net/browse/JDK-8002388
- http://bugs.java.com/bugdatabase/view_bug.do?bug_id=8034057
As of now, I don't know the exact reason for this problem but I have traced
that, the constructor for WindowsFileStore freaks during a call to
{code:java}WindowsNativeDispatcher#GetVolumeInformation{code}, which is a
native method and likely calling
https://msdn.microsoft.com/en-us/library/windows/desktop/aa364993(v=vs.85).aspx
So, in current scenario, I wanted to get things running and using io works for
both of the cases.
> Nifi Failed to Start: nio Files.getFileStore(Path) is buggy in Windows
> ----------------------------------------------------------------------
>
> Key: NIFI-3579
> URL: https://issues.apache.org/jira/browse/NIFI-3579
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 1.2.0, 1.1.1
> Environment: Win 10 with Oracle JDK 1.8.0_121 on NTFS
> Reporter: Puspendu Banerjee
> Assignee: Puspendu Banerjee
> Priority: Critical
> Labels: windows
> Attachments: nifi-app.log
>
>
> Nifi is failing to start due to IOException originating from
> FileSystemRepository during calls to {code:java}
> Files.getFileStore(path).getTotalSpace();
> Files.getFileStore(path).getUsableSpace();
> {code} with a read-access denied status.
> It looks like a buggy JDK implementation as on the other hand the following
> code is yielding result:
> {code:java}
> path.toFile().getTotalSpace();
> path.toFile().getUsableSpace();
> {code}
> Interestingly, the both of the codes are yielding same results for C:\ or
> System Drive.
> *sample*
> {code:java}
> import java.io.File;
> import java.io.IOException;
> import java.nio.file.Files;
> import java.nio.file.Path;
> import java.nio.file.Paths;
> import java.util.Arrays;
> import static java.lang.System.out;
> public class Blah {
> public static void main(String [] args) throws IOException{
> String [] _paths= {"D:\\workspace\\nifi", "c:\\Program Files"};
> final float divisor=1024 * 1024 * 1024f;
> for(String _path : _paths) {
> try {
> Path path = Paths.get(_path);
> out.println(path.toFile().getTotalSpace() /divisor + "GB");
> out.println(Files.getFileStore(path).getTotalSpace()/divisor
> +"GB");
> }catch (Exception ex){
> ex.printStackTrace();
> }
> }
> }
> }
> {code}
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