We're running Nginx 0.4.9 on Solaris 10 on Sparc, and are experiencing worker processes that are crashing with SIGSEGV.

Running a debugger which I'm not feeling very at home with, I believe that I managed to locate the offending code.

The debugger gives: root@facexpaces objs # mdb nginx

mdb: fork1 detected: follow (p)arent or (c)hild? c mdb: target forked child process 15778 (debugger following child) mdb: fork1 detected: follow (p)arent or (c)hild? c mdb: target forked child process 15779 (debugger following child) mdb: stop on SIGSEGV mdb: target stopped at: ngx_devpoll_process_events+0x208: ld [%i1 + 0xc], %g1 mdb: You've got symbols! Loading modules: [ ld.so.1 libc.so.1 ]

%g0 = 0x00000000 %l0 = 0x00000001 %g1 = 0x00000194 %l1 = 0x00000001 %g2 = 0x00000000 %l2 = 0x00000016 %g3 = 0x00000000 %l3 = 0x00096a88 %g4 = 0x00000000 %l4 = 0x00000000 %g5 = 0x00000000 %l5 = 0x00092c00 %g6 = 0x00000000 %l6 = 0x04000000 %g7 = 0xff392000 %l7 = 0x00004000 %o0 = 0x000d4250 %i0 = 0x0008ac00 %o1 = 0x00096d50 %i1 = 0x00000000 %o2 = 0xffbff9d0 %i2 = 0x00000000 %o3 = 0x00000000 %i3 = 0x00000000 %o4 = 0x00096a88 %i4 = 0x0006bc00 %o5 = 0x000cb7f8 %i5 = 0x0006bc00 %o6 = 0xffbff968 %i6 = 0xffbff9f0 %o7 = 0x0002efe0 ngx_devpoll_process_events+0x44c %i7 = 0x00023750 ngx_process_events_and_timers+0xb8

%psr = 0xfe901006 impl=0xf ver=0xe icc=NzvC ec=0 ef=4096 pil=0 s=0 ps=0 et=0 cwp=0x6 %y = 0x00000003 %pc = 0x0002ed9c ngx_devpoll_process_events+0x208 %npc = 0x0002eda0 ngx_devpoll_process_events+0x20c %sp = 0xffbff968 %fp = 0xffbff9f0

%wim = 0x00000000 %tbr = 0x00000000

Looking at the code I believe that it's line 403 in ngx_devpoll_module.c, inside the function ngx_devpoll_process_events. for (i = 0; i < events; i++) { c = ngx_cycle->files[event_list[i].fd];

if (c->read->closed) { continue; }

ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, "unexpected event"); continue; }

I hope that this bugreport is helpful, and are willing to help locating the problem further, and testing possible solutions.