Stéphane Cottin created MESOS-5893:
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             Summary: mesos-executor terminated forked children turn to zombies
                 Key: MESOS-5893
                 URL: https://issues.apache.org/jira/browse/MESOS-5893
             Project: Mesos
          Issue Type: Bug
          Components: containerization
    Affects Versions: 1.1.0
         Environment: mesos compiled from git master ( 1.1.0 ) 
{{../configure --enable-ssl --enable-libevent --prefix=/usr --enable-optimize 
--enable-silent-rules --enable-xfs-disk-isolator}}

isolators : 
{{namespaces/pid,cgroups/cpu,cgroups/mem,filesystem/linux,docker/runtime,network/cni,docker/volume}}


            Reporter: Stéphane Cottin


mesos containerizer does not properly handle children death.

discovered using marathon-lb, each topology update fork another haproxy,  the 
old haproxy process should properly die after its last client connection is 
terminated, but turn into a zombie.

{noformat}
 7716 ?        Ssl    0:00  |       \_ mesos-executor 
--launcher_dir=/usr/libexec/mesos --sandbox_directory=/mnt/mesos/sandbox 
--user=root --working_directory=/marathon-lb 
--rootfs=/mnt/mesos/provisioner/containers/3b381d5c-7490-4dcd-ab4b-81051226075a/backends/overlay/rootfses/a4beacac-2d7e-445b-80c8-a9b4e480c491
 7813 ?        Ss     0:00  |       |   \_ sh -c /marathon-lb/run sse 
--marathon https://marathon:8443 --auth-credentials user:pass --group 
'external' --ssl-certs /certs --max-serv-port-ip-per-task 20050
 7823 ?        S      0:00  |       |   |   \_ /bin/bash /marathon-lb/run sse 
--marathon https://marathon:8443 --auth-credentials user:pass --group external 
--ssl-certs /certs --max-serv-port-ip-per-task 20050
 7827 ?        S      0:00  |       |   |       \_ /usr/bin/runsv 
/marathon-lb/service/haproxy
 7829 ?        S      0:00  |       |   |       |   \_ /bin/bash ./run
 8879 ?        S      0:00  |       |   |       |       \_ sleep 0.5
 7828 ?        Sl     0:00  |       |   |       \_ python3 
/marathon-lb/marathon_lb.py --syslog-socket /dev/null --haproxy-config 
/marathon-lb/haproxy.cfg --ssl-certs /certs --command sv reload 
/marathon-lb/service/haproxy --sse --marathon https://marathon:8443 
--auth-credentials user:pass --group external --max-serv-port-ip-per-task 20050
 7906 ?        Zs     0:00  |       |   \_ [haproxy] <defunct>
 8628 ?        Zs     0:00  |       |   \_ [haproxy] <defunct>
 8722 ?        Ss     0:00  |       |   \_ haproxy -p /tmp/haproxy.pid -f 
/marathon-lb/haproxy.cfg -D -sf 144 52
{noformat}






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