CRIU RPC request failed with message: error:56

[zhaohang15639535703]

let mut criu = rust_criu::Criu::new().expect("unable to new a criu");
    match criu.get_criu_version() {
        Ok(version) => info!("criu version: {}", version),
        Err(e) => error!("{:#?}", e),
    };

    
    let image_dir = format!("images_{}", pid);
    if Path::new(&image_dir).exists() {
        warn!("image directory exists");
        if let Err(e) = std::fs::remove_dir_all(&image_dir) {
            error!("Failed to remove existing directory '{}': {:#?}", image_dir, e);
            return Err(anyhow!("remove existing directory failed"));
        }
    }
    if let Err(e) = std::fs::create_dir(&image_dir) {
        error!("Failed to create directory '{}': {:#?}", image_dir, e);
        return Err(anyhow!("create dirctory fails"));
    }

    let directory = std::fs::File::open(&image_dir)?;
    
    criu.set_pid(pid); // set target pid
    criu.set_images_dir_fd(directory.as_raw_fd()); // set temporary file
    criu.set_log_file(format!("{}/dumppp.log", image_dir));
    criu.set_log_level(4);
    criu.set_leave_running(false); // set process to stop when dumping is done

    
    // do dump
    info!("dumping process {}",pid);
    criu.dump().map_err(|e| anyhow!("dump fails:{:#?}",e))?;

When I run this code i got an error: Error: dump fails:"CRIU RPC request failed with message: error:56".Is there any solution?

[adrianreber]

Works for me. Are you running is as root? Are you using it on Linux? Any information about your system and environment?

I get:

target/debug/rust-criu-test /usr/sbin/criu
Version from CRIU found in $PATH: 31900
Version from /usr/sbin/criu: 31900
Dumping PID 3266180
Restoring PID 3266180
Cleaning up