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From "Santhosh Shanmugham (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MESOS-6420) Mesos Agent leaking sockets when network isolation is ON
Date Wed, 19 Oct 2016 22:34:58 GMT

    [ https://issues.apache.org/jira/browse/MESOS-6420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15590075#comment-15590075
] 

Santhosh Shanmugham commented on MESOS-6420:
--------------------------------------------

When running with Valgrind, the slave fails to prepare isolators for the containers.

`/usr/local/bin/valgrind --trace-children=yes --tool=memcheck --leak-check=full --track-fds=yes
/usr/local/bin/mesos-slave.sh /usr/local/mesos/conf/mesos-slave-config.sh`

Failed to launch container: Failed to fork executor: Failed to clone child process: Failed
to synchronize child process; Container destroyed while preparing isolators

> Mesos Agent leaking sockets when network isolation is ON
> --------------------------------------------------------
>
>                 Key: MESOS-6420
>                 URL: https://issues.apache.org/jira/browse/MESOS-6420
>             Project: Mesos
>          Issue Type: Bug
>          Components: isolation, network, slave
>    Affects Versions: 1.0.2
>            Reporter: Santhosh Shanmugham
>
> Mesos Agent leaks one socket per task launched and eventually runs out of sockets. We
were able to track it down to the network isolator (port_mapping.cpp). When we turned off
the port mapping isolator no file descriptors where leaked. The leaked fd is a SOCK_STREAM
socket.
> Leaked Sockets:
> sshanmugham[5]smf1-aeu-07-sr3(mesos.test.slave) ~ $ sudo lsof -p $(pgrep -u root -o -f
/usr/local/sbin/mesos-slave) -nP | grep "can't"
> [sudo] password for sshanmugham:
> mesos-sla 57688 root   19u  sock        0,6      0t0 2993216948 can't identify protocol
> mesos-sla 57688 root   27u  sock        0,6      0t0 2993216468 can't identify protocol
> Extract from strace:
> ...
> [pid 57701] 19:14:02.493718 socket(PF_NETLINK, SOCK_RAW, 0) = 19
> [pid 57701] 19:14:02.494395 close(19)   = 0
> [pid 57701] 19:14:02.494448 socket(PF_NETLINK, SOCK_RAW, 0) = 19
> [pid 57701] 19:14:02.494844 close(19)   = 0
> [pid 57701] 19:14:02.494913 socket(PF_NETLINK, SOCK_RAW, 0) = 19
> [pid 57701] 19:14:02.495565 close(19)   = 0
> [pid 57701] 19:14:02.495617 socket(PF_NETLINK, SOCK_RAW, 0) = 19
> [pid 57701] 19:14:02.496072 close(19)   = 0
> [pid 57701] 19:14:02.496128 socket(PF_NETLINK, SOCK_RAW, 0) = 19
> [pid 57701] 19:14:02.496758 close(19)   = 0
> [pid 57701] 19:14:02.496812 socket(PF_NETLINK, SOCK_RAW, 0) = 19
> [pid 57701] 19:14:02.497270 close(19)   = 0
> [pid 57701] 19:14:02.497319 socket(PF_NETLINK, SOCK_RAW, 0) = 19
> [pid 57701] 19:14:02.497698 close(19)   = 0
> [pid 57701] 19:14:02.497750 socket(PF_NETLINK, SOCK_RAW, 0) = 19
> [pid 57701] 19:14:02.498407 close(19)   = 0
> [pid 57701] 19:14:02.498456 socket(PF_NETLINK, SOCK_RAW, 0) = 19
> [pid 57701] 19:14:02.498899 close(19)   = 0
> [pid 57701] 19:14:02.498963 socket(PF_NETLINK, SOCK_RAW, 0) = 19
> [pid 63682] 19:14:02.499091 close(18 <unfinished ...>
> [pid 57701] 19:14:02.499634 close(19)   = 0
> [pid 57701] 19:14:02.499689 socket(PF_NETLINK, SOCK_RAW, 0) = 19
> [pid 57701] 19:14:02.500044 close(19)   = 0
> [pid 57701] 19:14:02.500093 socket(PF_NETLINK, SOCK_RAW, 0) = 19
> [pid 57701] 19:14:02.500734 close(19)   = 0
> [pid 57701] 19:14:02.500782 socket(PF_NETLINK, SOCK_RAW, 0) = 19
> [pid 57701] 19:14:02.501271 close(19)   = 0
> [pid 57701] 19:14:02.501339 socket(PF_NETLINK, SOCK_RAW, 0) = 19
> [pid 57701] 19:14:02.502030 close(19)   = 0
> [pid 57701] 19:14:02.502101 socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 19
> ...
> ...
> [pid 57691] 19:18:03.461022 socket(PF_NETLINK, SOCK_RAW, 0) = 27
> [pid  6138] 19:18:03.461345 open("/etc/selinux/config", O_RDONLY <unfinished ...>
> [pid 57691] 19:18:03.461460 close(27)   = 0
> [pid 57691] 19:18:03.461520 socket(PF_NETLINK, SOCK_RAW, 0) = 27
> [pid  6138] 19:18:03.461632 close(3 <unfinished ...>
> [pid  6138] 19:18:03.461781 open("/proc/mounts", O_RDONLY <unfinished ...>
> [pid  6138] 19:18:03.462190 close(3 <unfinished ...>
> [pid 57691] 19:18:03.462374 close(27)   = 0
> [pid 57691] 19:18:03.462430 socket(PF_NETLINK, SOCK_RAW, 0 <unfinished ...>
> [pid  6138] 19:18:03.462456 open("/proc/net/psched", O_RDONLY <unfinished ...>
> [pid  6138] 19:18:03.462678 close(3 <unfinished ...>
> [pid  6138] 19:18:03.462915 open("/etc/libnl/classid", O_RDONLY <unfinished ...>
> [pid 57691] 19:18:03.463046 close(27)   = 0
> [pid 57691] 19:18:03.463111 socket(PF_NETLINK, SOCK_RAW, 0) = 27
> [pid  6138] 19:18:03.463225 close(3 <unfinished ...>
> [pid 57691] 19:18:03.463845 close(27)   = 0
> [pid 57691] 19:18:03.463911 socket(PF_NETLINK, SOCK_RAW, 0) = 27
> [pid 57691] 19:18:03.464604 close(27)   = 0
> [pid 57691] 19:18:03.464664 socket(PF_NETLINK, SOCK_RAW, 0) = 27
> [pid 57691] 19:18:03.465074 close(27)   = 0
> [pid 57691] 19:18:03.465132 socket(PF_NETLINK, SOCK_RAW, 0) = 27
> [pid 57691] 19:18:03.465862 close(27)   = 0
> [pid 57691] 19:18:03.465928 socket(PF_NETLINK, SOCK_RAW, 0) = 27
> [pid 57691] 19:18:03.466713 close(27)   = 0
> [pid 57691] 19:18:03.466780 socket(PF_NETLINK, SOCK_RAW, 0) = 27
> [pid 57691] 19:18:03.467472 close(27)   = 0
> [pid 57691] 19:18:03.467524 socket(PF_NETLINK, SOCK_RAW, 0) = 27
> [pid 57691] 19:18:03.468012 close(27)   = 0
> [pid 57691] 19:18:03.468075 socket(PF_NETLINK, SOCK_RAW, 0) = 27
> [pid 57691] 19:18:03.468799 close(27)   = 0
> [pid 57691] 19:18:03.468950 socket(PF_NETLINK, SOCK_RAW, 0) = 27
> [pid 57691] 19:18:03.469505 close(27)   = 0
> [pid 57691] 19:18:03.469578 socket(PF_NETLINK, SOCK_RAW, 0) = 27
> [pid 57691] 19:18:03.470301 close(27)   = 0
> [pid 57691] 19:18:03.470353 socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 27
> ...
> The last socket the was created never has a corresponding close().



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