java.io.IOException: The process cannot access the file because another process has locked a portion - when using IOUtils.copyLarge() in Windows

Question

The issue is stemming from the specificied line of code in this try block:

try {
            fInputStream = new FileInputStream(path);
#thisLine   byteCount += IOUtils.copyLarge(fInputStream, fOutputStream);
            fileCount++;
    }

The stack-trace looks like this:

java.io.IOException: The process cannot access the file because another 
process has locked a portion 
 of the file 
        at java.io.FileInputStream.readBytes(Native Method) 
        at java.io.FileInputStream.read(FileInputStream.java:233) 
        at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1719) 
        at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1696)

This seems to be a Windows-specific issue. Is there some File I/O best practice(s) specific to Windows that I might be missing?

@primitiveType Of course there is. That's what the exception says. — user207421, Jul 08 '15 at 10:13

score 1 · Answer 1 · edited Dec 06 '19 at 14:46

1

I have resolved that issue by passing earlier created fileChannel object.

FileChannel fileChannel = FileChannel.open(path, 
                   StandardOpenOption.READ,StandardOpenOption.WRITE);

then I created InputStream object like this:

Channels.newInputStream(fileChannel);

It worked and no more exception occurred.

edited Dec 06 '19 at 14:46

Dave2e

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answered Dec 06 '19 at 13:40

JPawelHeaven

31
1

score 0 · Answer 2 · edited May 23 '17 at 12:25

0

Check if another process is accessing the same file. On Windows follow this post to figure it out -> https://superuser.com/questions/399659/how-can-i-identify-what-application-is-using-a-given-file

It should work as soon as no other process is accessing the same file.

To make sure you can actually access the file consider reading the following topic -> Java: Check if file is already open

edited May 23 '17 at 12:25

Community

1
1

answered Jul 08 '15 at 09:35

Julian Pieles

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java.io.IOException: The process cannot access the file because another process has locked a portion - when using IOUtils.copyLarge() in Windows

2 Answers2

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