ADDITIONAL SYSTEM INFORMATION :
openjdk version "17" 2021-09-14
OpenJDK Runtime Environment (build 17+35-2724)
OpenJDK 64-Bit Server VM (build 17+35-2724, mixed mode, sharing)

Distributor ID: Debian
Description: Debian GNU/Linux 10 (buster)
Release: 10
Codename: buster

A DESCRIPTION OF THE PROBLEM :
There is nothing in the API that says write() should not be able to write more than 2Gb. It even returns a long for number of bytes written which would imply expectations that more than 2Gb would be supported.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create more than 2Gb of ByteBuffers as a array of ByteBuffers then try writing with FileChannel.write(ByteBuffer[]...)

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
3Gb written to disk
ACTUAL -
2Gb written to disk

---------- BEGIN SOURCE ----------
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;

public class FileChannel2GLimitTest {
    static final int GB = 1024*1024*1024;
    public static void main(String[] args) throws IOException {
        ByteBuffer[] bigBuffers = new ByteBuffer[] {
                ByteBuffer.allocateDirect(GB),
                ByteBuffer.allocateDirect(GB),
                ByteBuffer.allocateDirect(GB)
        };
        for(ByteBuffer buf:bigBuffers) buf.clear();
        Path tempFile = Files.createTempFile("FileChannel2GLimitTest",".dat");
        try {
            System.out.println("Starting to write 3Gb of data...");
            FileChannel fc = FileChannel.open(tempFile, StandardOpenOption.CREATE,StandardOpenOption.WRITE);
            long bytesWritten = fc.write(bigBuffers);
            System.out.printf("Bytes written = %,d\n",bytesWritten);
            System.out.printf("Total bytes = %,d\n",GB*3L);
        } finally {
            Files.delete(tempFile);
        }
    }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
I think you can call FileChannel.write in a loop till number of bytes written is 0 but not checked data yet to know that every byte is currently written and none are lost.

FREQUENCY : always