[Ocamlnet-devel] Netplex issue with VServer PID namespace

[Thomas C. <cal...@gm...>]

Hi,

We are observing an issue when using OCamlnet netplex in combination with
VServer PID namespaces.
We are using Netplex in the multi-process mode.

Here is what we are doing:
  - start our netplex controller
    - use the post_add_hook to enter a new PID namespace
  - use dynamic workload manager to spawn child workers
    - configured with conn_limit=1

  - launch a loop of client connections
    - this spawns a new worker process for each connection

After several successful connections of the loop, clients cannot connect
anymore.
We observe some worker processes in a defunct/zombie state.
The controller and running worker processes seem deadlocked in some
condition.

When we do not use the post_add_hook to enter a new PID namespace, the
problem cannot be triggered anymore.

Do you have any hint on this?

Many thanks.

Thomas