exec leaving defunct processes about erlexec

[saleyn]

Could you please retest this with the latest pull as I believe it could have resolved this issue?

[erlanger]

It is much better than before. I used to get a large number of zombies, but now it leaves a lesser number (about 10-15 with a run of 1000). A great improvement is that now I get a timeout, before it would just continue.

This is what I get:

3> [ exec:run("echo ho",[stdout]) || T <- lists:seq(1,1) ].    
[{ok,<0.277.0>,13482}]
4> [ exec:run("echo ho",[stdout]) || T <- lists:seq(1,10) ].
[{ok,<0.279.0>,13483},
 {ok,<0.280.0>,13484},
 {ok,<0.281.0>,13485},
 {ok,<0.282.0>,13486},
 {ok,<0.283.0>,13487},
 {ok,<0.284.0>,13488},
 {ok,<0.285.0>,13489},
 {ok,<0.286.0>,13490},
 {ok,<0.287.0>,13491},
 {ok,<0.288.0>,13492}]
5> [ exec:run("echo ho",[stdout]) || T <- lists:seq(1,1000) ]. 
** exception exit: {timeout,{gen_server,call,
                                        [exec,{port,{{run,"echo ho",[stdout]},nolink}},30000]}}
     in function  gen_server:call/3 (gen_server.erl, line 190)
     in call from exec:do_run/2 (src/exec.erl, line 685)

from htop (notice the Z) :

...
3579 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13586 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13587 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13590 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13592 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13593 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13596 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13599 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13600 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13601 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13603 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13604 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13605 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13606 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13608 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13609 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
13610 erlanger    20   0     0     0     0 Z  0.0  0.0  0:00.00 bash
...