fluentd/ruby pagefault

[eyberg]

.....*snip*.....
 1 direct return: 93
 1 clock_gettime
 1 clock_gettime: clk_id 0
 1 direct return: 0
 1 clock_gettime
 1 clock_gettime: clk_id 0
 1 direct return: 0
 1 open
 1 open: "/etc/localtime", flags 80000, mode 1b6
 1 "/etc/localtime" - not found
 1 direct return: -2
 1 write
2019-02-27 19:46:48 +0000 [info]: #0 [debug_agent_input] listening dRuby uri="druby://127.0.0.1:24230" object="Fluent::Engine" worker=0
 1 direct return: 136
 1 socket
 1 direct return: 12
 1 fcntl
 1 direct return: 0
 1 fcntl
 1 direct return: 0
 1 fcntl
 1 direct return: 0
 1 setsockopt
 1 direct return: 0
 1 bind
 1 direct return: 0
 1 listen
 1 direct return: 0
 1 fstat
 1 fd 12, stat 0000000010223b2e0
Page fault
interrupt: 000000000000000e
frame: 0000000100201c00
error code: 0000000000000000
address: 0000000000000019
rax: 000000010223b370
rbx: 0000000000000001
rcx: 0000000103f8f000
rdx: 000000010223b370
rsi: 0000010000000000
rdi: 0000010000000000
rbp: 000000010223b208
rsp: 000000010223b1e8
r8: 0000000000000001
r9: 0000000000000010
r10: 0000000000000080
r11: 0000000000000010
r12: 0000000000000001
r13: 0000000000000001
r14: 0000010000000000
r15: 00000000015fd010
rip: 000000007f00af12   (table_find + 0000000000000019/0000000000000095)
flags: 0000000000000002
stack trace:
000000007f014fa4        (children + 0000000000000025/0000000000000083)
000000007f0151d8        (fill_stat + 0000000000000025/00000000000000a7)
000000007f01531c        (fstat + 00000000000000c2/00000000000000c9)
000000007f017337        (syscall_debug + 00000000000000a8/00000000000001b6)
000000007f0000c4        (syscall_enter + 0000000000000062/000000000000006f)
starting gdb
 1 sleep
                 3 run frame 00000000100202800, RIP=00000007000d073e1
                 3 set_robust_list
                 3 nosyscall set_robust_list
                 3 mmap
                 3 mmap: target 00000000000000000, size 8000000, prot 0, flags 4022, fd -1, offset 0
                 3    anon target: 7010000000, len: 8000000 (given size: 8000000)
                 3 direct return: 481304772608
                 3 munmap
                 3 direct return: 0
                 3 mprotect
                 3 direct return: 0
                 3 sched_getaffinity
                 3 direct return: 0

eyberg@dungeon:~/fl$ cat config.json
{
  "Args": ["/.gem/ruby/2.3.0/bin/fluentd", "-c", "/fluent/fluent.conf", "-vv", "--under-supervisor"],
  "Dirs": ["fluent"],
  "Files": ["/lib/x86_64-linux-gnu/librt.so.1", "/lib/x86_64-linux-gnu/libz.so.1", "/lib/x86_64-linux-gnu/libssl.so.1.0.0", "/lib/x86_64-linux-gnu/libcrypto.so.1.0.0"],
  "MapDirs": {"/home/eyberg/.gem/*": "/.gem" }
}

 ops load ruby_2.3.1 -d -c config.json

this is using druby underneath which is a cross-machine/cross-process rpc/serialization protocol so this might not really be worth looking at anyways - i've marked it low priority as such

[wjhun]

It's trying to do an fstat on a socket, which isn't supported yet. Working on a fix.

[wjhun]

See #526 for an update...I meant to put it here, though the crashes are the same at this point.

[eyberg]

i think we can close this one - we're tracking #561