execing command in container: error stream protocol error: invalid exit code value 4294967295

[113xiaoji]

When using crictl to execute the exec command, there is an intermittent error reported:

execing command in container: error stream protocol error: invalid exit code value 4294967295

The relevant Go code snippet is as follows:

		return pidMonitor.pidPoller.Add(pidFD, func() error {
			execPid := e.Pid()

			status := 256

			event, err := execExitStore.GetExitedEvent(e.traceEventID)

			if err == nil && event.Pid == uint32(execPid) {
				status = int(event.ExitCode)
			}
			execExitStore.DeleteExitedEvent(e.traceEventID)

			e.SetExited(status)
			return nil
		})

When event, err := execExitStore.GetExitedEvent(e.traceEventID) encounters an error, the status is set to 256. The setExited method then calls unix.WaitStatus(status).ExitStatus(), as shown here:

func (e *execProcess) setExited(status int) {
    e.status = unix.WaitStatus(status).ExitStatus()
    e.exited = time.Now()

    if e.parent.platform != nil {
       e.parent.platform.ShutdownConsole(context.Background(), e.console)
    }
    close(e.waitBlock)
}

According to the source code, this will return -1:

func (w WaitStatus) ExitStatus() int {
	if !w.Exited() {
		return -1
	}
	return int(w>>shift) & 0xFF
}

As a result, the error message is generated:

execing command in container: error stream protocol error: invalid exit code value 4294967295