代码如下

    public void writeWithFileLock(File tempFile){
        try (FileChannel workPathResourceMd5Lock = new RandomAccessFile(tempFile,"rw").getChannel()) {
            log.info("start to lock");
            workPathResourceMd5Lock.lock(0, 10, false);
            log.info("locked");
            workPathResourceMd5Lock.truncate(0);
            workPathResourceMd5Lock.write(ByteBuffer.wrap("1111".getBytes(StandardCharsets.UTF_8)));
            Thread.sleep(10000);
        } catch (Exception ex){
            log.error("Error", ex);
        }

        try {
            log.info("finished.{}:{}", tempFile.getAbsolutePath(), FileUtils.readFileToString(tempFile, StandardCharsets.UTF_8));
        } catch (IOException e) {
            log.error("Error.", e);
        }
    }

使用上述代码，多进程运行测试文件锁

表现：

  1. windows下，两个进程一个先获取文件锁，进程2则等待1 try-catch段执行完成，才开始运行

  2. idea运行到wsl上，两个进程先后进入，文件锁未生效

环境版本:

wsl1 on windows

Microsoft Windows [版本 10.0.18362.295]

wsl版本

DISTRIB_ID=Ubuntu

DISTRIB_RELEASE=20.04

DISTRIB_CODENAME=focal

DISTRIB_DESCRIPTION="Ubuntu 20.04.6 LTS"

相关问题

  1. fcntl(F_SETLK) for setting byte range locks is broken leading to data corruption