Server crashed under stress test

[puqing]

With the default configuration, the server crashed by this test:

$ while true; do echo -e "SET abc 1 \nGET abc"; done | ./client 127.0.0.1 8888

It seems the function 'expand_queue' failed to allocate enough memory.

An assertion on the return value of malloc(3) was put in the function, and the call-stack is like this:
#0 0x00007f8bda192475 in raise () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007f8bda1956f0 in abort () from /lib/x86_64-linux-gnu/libc.so.6
#2 0x00007f8bda18b621 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6
#3 0x00000000004055da in expand_queue (q=0x135ee00)

at skynet-src/skynet_mq.c:153

#4 0x00000000004058c3 in skynet_mq_push (q=0x135ee00, message=0x7f8bd8846c40)

at skynet-src/skynet_mq.c:211

#5 0x000000000040600d in skynet_context_push (handle=16777240,

message=0x7f8bd8846c40) at skynet-src/skynet_server.c:170

#6 0x0000000000407631 in skynet_send (context=0x7f8bd405c670,

source=16777232, destination=16777240, type=65539, session=0, 
data=0xca60e70, sz=50331655) at skynet-src/skynet_server.c:631

#7 0x00007f8bd9858f9b in _forward (g=0x7f8bd405c610, c=0x7f8bd4079ae0, size=7)

at service-src/service_gate.c:175

#8 0x00007f8bd9859131 in dispatch_message (g=0x7f8bd405c610,

c=0x7f8bd4079ae0, id=13, data=0x7f8bc3c52410, sz=16384)
at service-src/service_gate.c:199

#9 0x00007f8bd9859208 in dispatch_socket_message (g=0x7f8bd405c610,

message=0x7f8bc3c00a90, sz=0) at service-src/service_gate.c:214

#10 0x00007f8bd985964b in _cb (ctx=0x7f8bd405c670, ud=0x7f8bd405c610, type=6,

session=0, source=0, msg=0x7f8bc3c00a90, sz=24)
at service-src/service_gate.c:297

#11 0x0000000000406333 in _dispatch_message (ctx=0x7f8bd405c670,

msg=0x7f8bd8846e60) at skynet-src/skynet_server.c:250

#12 0x0000000000406481 in skynet_context_message_dispatch (sm=0x12fbcb0)

at skynet-src/skynet_server.c:288

#13 0x0000000000407b5c in _worker (p=0x7fff5de06dd0)

at skynet-src/skynet_start.c:122

#14 0x00007f8bdadb1b50 in start_thread ()

from /lib/x86_64-linux-gnu/libpthread.so.0
#15 0x00007f8bda23c0ed in clone () from /lib/x86_64-linux-gnu/libc.so.6
#16 0x0000000000000000 in ?? ()

The system is a 64-bit and 4-core computer running Linux.

[cloudwu]

See Issue #63

[cloudwu]

And read readme.md, you should launch Global logger server for this test

./skynet config_log # Launch second skynet node (Global logger server)