请教一个问题，使用openresty过程中出现core dump

[mian wang]

Hi，all：

近期在使用openresty（版本号：1.15.8.2）来处理请求时，出现了core dump，调用栈如下：

(gdb) bt

#0  0x00007f67906b09d0 in tmalloc_large (msp=0x7f6790104010, nsize=<value optimized out>) at lj_alloc.c:1197

#1  lj_alloc_malloc (msp=0x7f6790104010, nsize=<value optimized out>) at lj_alloc.c:1324

#2  0x00007f67906b1d41 in lj_alloc_realloc (msp=0x7f6790104010, ptr=0x7f674e14ef00, nsize=2056) at lj_alloc.c:1467

#3  0x00007f6790653a0f in lj_mem_realloc (L=0x7f6749cb2bb8, p=<value optimized out>, osz=1032, nsz=2056) at lj_gc.c:818

#4  0x00007f6790658b0e in lj_tab_resize (L=0x7f6749cb2bb8, t=0x7f674e14eca8, asize=257, hbits=<value optimized out>)

    at lj_tab.c:268

#5  0x00007f6790658d9b in rehashtab (L=0x7f6749cb2bb8, t=0x7f674e14eca8, ek=0x7ffddc2ed580) at lj_tab.c:387

#6  0x00007f6790658f9e in lj_tab_newkey (L=0x7f6749cb2bb8, t=0x7f674e14eca8, key=0x7ffddc2ed580) at lj_tab.c:471

#7  0x00007f6790659236 in lj_tab_setinth (L=<value optimized out>, t=<value optimized out>, key=<value optimized out>)

    at lj_tab.c:547

#8  0x00007f67906656be in lua_rawseti (L=0x7f6749cb2bb8, idx=<value optimized out>, n=129) at lj_api.c:1002

#9  0x00007f674febff04 in json_parse_array_context (l=0x7f6749cb2bb8, json=0x7ffddc2ed670, token=<value optimized out>)

    at lua_cjson.c:1305

#10 json_process_value (l=0x7f6749cb2bb8, json=0x7ffddc2ed670, token=<value optimized out>) at lua_cjson.c:1339

#11 0x00007f674fec003a in json_decode (l=0x7f6749cb2bb8) at lua_cjson.c:1378

#12 0x00007f67906514d2 in lj_BC_FUNCC () from /home/work/302rcjorcol/luajit/lib/libluajit-5.1.so.2

#13 0x00007f67906649f7 in lua_pcall (L=0x7f6749cb2bb8, nargs=1, nresults=1, errfunc=<value optimized out>) at lj_api.c:1129

#14 0x00007f674fec06dd in json_protect_conversion (l=0x7f6749cb2bb8) at lua_cjson.c:1430

#15 0x00007f67906514d2 in lj_BC_FUNCC () from /home/work/302rcjorcol/luajit/lib/libluajit-5.1.so.2

#16 0x0000000000501049 in ngx_http_lua_run_thread (L=0x7f6790104378, r=0x1e2e6f0, ctx=0x1ed7080, nrets=0)

    at ../ngx_lua-0.10.15/src/ngx_http_lua_util.c:1091

#17 0x0000000000503a3a in ngx_http_lua_content_by_chunk (L=0x7f6790104378, r=0x1e2e6f0)

    at ../ngx_lua-0.10.15/src/ngx_http_lua_contentby.c:122

#18 0x0000000000503e06 in ngx_http_lua_content_handler_file (r=0x1e2e6f0) at ../ngx_lua-0.10.15/src/ngx_http_lua_contentby.c:286

#19 0x0000000000503f42 in ngx_http_lua_content_handler (r=0x1e2e6f0) at ../ngx_lua-0.10.15/src/ngx_http_lua_contentby.c:224

#20 0x000000000045f224 in ngx_http_core_content_phase (r=0x1e2e6f0, ph=0x1d61560) at src/http/ngx_http_core_module.c:1180

#21 0x000000000045911d in ngx_http_core_run_phases (r=0x1e2e6f0) at src/http/ngx_http_core_module.c:869

#22 0x00000000004656a8 in ngx_http_process_request_headers (rev=<value optimized out>) at src/http/ngx_http_request.c:1381

#23 0x0000000000465cc4 in ngx_http_process_request_line (rev=0x7f674efefa30) at src/http/ngx_http_request.c:1051

#24 0x000000000044dc01 in ngx_epoll_process_events (cycle=0x1cf49e0, timer=<value optimized out>, flags=<value optimized out>)

    at src/event/modules/ngx_epoll_module.c:902

#25 0x0000000000442ada in ngx_process_events_and_timers (cycle=0x1cf49e0) at src/event/ngx_event.c:252

#26 0x000000000044b7e5 in ngx_worker_process_cycle (cycle=0x1cf49e0, data=<value optimized out>)

    at src/os/unix/ngx_process_cycle.c:816

---Type <return> to continue, or q <return> to quit---

#27 0x0000000000449920 in ngx_spawn_process (cycle=0x1cf49e0, proc=0x44b7a0 <ngx_worker_process_cycle>, data=0x2, 

    name=0x56bf94 "worker process", respawn=-3) at src/os/unix/ngx_process.c:199

#28 0x000000000044aa2c in ngx_start_worker_processes (cycle=0x1cf49e0, n=6, type=-3) at src/os/unix/ngx_process_cycle.c:397

#29 0x000000000044c0f3 in ngx_master_process_cycle (cycle=0x1cf49e0) at src/os/unix/ngx_process_cycle.c:136

#30 0x00000000004221fd in main (argc=<value optimized out>, argv=<value optimized out>) at src/core/nginx.c:382

 lj_alloc.c 中第 1197行 的代码是：

该宏定义是：

接触openresty不久，不知道该如何查起，还请各位指导一下可能的方向。

[along]

看起来像是content_by_lua里面哪里写的有问题导致的，可以仔细的检查一下代码再看看

[mian wang]

是的，对请求的处理主要在content_by_lua里调用了lua脚本进行，但是检查代码，目前来看，没有什么问题。另外想请教的是，根据调用栈的信息来看，主要在tmalloc_large出现了问题，想问下，tmalloc_large出现问题，可能的原因有哪些？是内存不足还是其他?

在 2019年10月9日星期三 UTC+8下午4:56:15，along写道：