use a unique name for the fifo

(we never know)

docker/controller.py

@@ -932,7 +932,7 @@ class JobManager(Manager):
                     #   - we have no unusual dependencies (only sh, cat and
                     #     mkfifo)
                    command = ["/bin/sh", "-c", """
-                                fifo=/tmp/.allgo.fifo
+                                fifo=/tmp/.allgo.fifo.{job_id}
                                 if mkfifo "$fifo"
                                 then
                                     exec cat <"$fifo" >allgo.log &
@@ -943,7 +943,7 @@ class JobManager(Manager):
                                 else
                                     "$@" 2>&1 | cat >allgo.log
                                 fi
-                        """,
+                        """.format(job_id=job.id),
                         "job%d" % job.id, webapp.entrypoint] + shlex.split(job.param),
 
                     labels = {"allgo.tmp_img": tmp_img or ""},