freezer-agent freeze

[yangzhenming]

I use freezer-agent in command line to backup some files.
command: freezer-agent --path-to-backup /opt/backupdir --container testfull --backup-name backuptest --storage local --engine tar
In some reason, the metadata file is broken.When I try to restore the backup, the freezer-agent process is frozen.
command: freezer-agent --action restore --restore-abs-path /opt/restore --container testfull --backup-name backuptest --storage local --engine tar

I think there should be some exception process in the function restore_level() of freezer\engine\tar\tar.py.

        except Exception as e:
      try:
                while read_pipe.recv_bytes():
        pass
            except EOFError:
                pass
            LOG.exception(e)
            except_queue.put(e)
            raise

If the data is not received from the read_pipe,the function read_blocks() will not be end.