> I guess the container is not reused when disabled auto-reducer in my case is > due to that the default timeout for tez is about 10s.
There's another config which can let you run it without losing containers (at least if you know how many you want to keep). tez.am.session.min.held-containers This will hold <n> containers with no timeout and try to spread them across as many nodes as possible (to serve locality better). However, this needs to set into the tez-site.xml being a tez.am.* parameter. Cheers, Gopal