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numberqname generator error handling is confusing #104

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pemensik opened this issue Jun 9, 2023 · 6 comments
Open

numberqname generator error handling is confusing #104

pemensik opened this issue Jun 9, 2023 · 6 comments

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@pemensik
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pemensik commented Jun 9, 2023 

# flame -P tcp -g numberqname -r test. 127.0.0.2
binding to 0.0.0.0
flaming target(s) [127.0.0.2] on port 53 with 30 concurrent generators, each sending 100 queries every 1000ms on protocol tcp
query generator [numberqname] contains 0 record(s)
terminate called after throwing an instance of 'std::runtime_error'
  what():  tcp unsupported
Aborted (core dumped)
# rpm -q flamethrower
flamethrower-0.11.0-12.fc37.x86_64

Is something wrong with my build or flamethrower indeed cannot measure TCP, but can measure dot from the same binary?
@pemensik
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pemensik commented Jun 9, 2023 

(gdb) bt
#0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#1  0x00007f8b782afec3 in __pthread_kill_internal (signo=6, threadid=<optimized out>) at pthread_kill.c:78
#2  0x00007f8b7825fa76 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#3  0x00007f8b782497fc in __GI_abort () at abort.c:79
#4  0x00007f8b784a2b37 in __gnu_cxx::__verbose_terminate_handler () at ../../../../libstdc++-v3/libsupc++/vterminate.cc:95
#5  0x00007f8b784ae44c in __cxxabiv1::__terminate (handler=<optimized out>) at ../../../../libstdc++-v3/libsupc++/eh_terminate.cc:48
#6  0x00007f8b784ad4b9 in __cxa_call_terminate (ue_header=0x55c0173b76f0) at ../../../../libstdc++-v3/libsupc++/eh_call.cc:54
#7  0x00007f8b784adbd6 in __cxxabiv1::__gxx_personality_v0 (version=<optimized out>, actions=6, exception_class=5138137972254386944, 
    ue_header=<optimized out>, context=0x7ffe86bbfbd0) at ../../../../libstdc++-v3/libsupc++/eh_personality.cc:688
#8  0x00007f8b787d0894 in _Unwind_RaiseException_Phase2 (exc=exc@entry=0x55c0173b76f0, context=context@entry=0x7ffe86bbfbd0, 
    frames_p=frames_p@entry=0x7ffe86bbfad8) at ../../../libgcc/unwind.inc:64
#9  0x00007f8b787d12ed in _Unwind_Resume (exc=exc@entry=0x55c0173b76f0) at ../../../libgcc/unwind.inc:242
#10 0x00007f8b7887a955 in std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count (this=<optimized out>, this=<optimized out>)
    at /usr/include/c++/12/bits/shared_ptr_base.h:1071
#11 std::__shared_ptr<uvw::details::ConnectReq, (__gnu_cxx::_Lock_policy)2>::~__shared_ptr (this=<optimized out>, this=<optimized out>)
    at /usr/include/c++/12/bits/shared_ptr_base.h:1524
#12 std::shared_ptr<uvw::details::ConnectReq>::~shared_ptr (this=<optimized out>, this=<optimized out>)
    at /usr/include/c++/12/bits/shared_ptr.h:175
#13 uvw::Request<uvw::details::ConnectReq, uv_connect_s>::defaultCallback<uvw::ConnectEvent> (req=<optimized out>, 
    status=<optimized out>) at /usr/include/uvw/request.hpp:34
#14 0x00007f8b7884ce87 in uv__stream_connect (stream=0x55c01733ccd8) at src/unix/stream.c:1345
#15 uv__stream_io (loop=<optimized out>, w=0x55c01733cd60, events=4) at src/unix/stream.c:1262
#16 0x00007f8b788517cd in uv__io_poll (loop=0x7f8b7885d160 <default_loop_struct>, timeout=<optimized out>) at src/unix/epoll.c:374
#17 0x00007f8b7883b72a in uv__io_poll (timeout=<optimized out>, loop=0x7f8b7885d160 <default_loop_struct>) at src/unix/udp.c:122
#18 uv_run (loop=0x7f8b7885d160 <default_loop_struct>, mode=UV_RUN_DEFAULT) at src/unix/core.c:406
#19 0x000055c01642e47a in uvw::Loop::run<(uvw::details::UVRunMode)0> (this=0x55c017321910) at /usr/include/uvw/loop.cpp:72
#20 main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/flamethrower-0.11.0-12.fc37.x86_64/flame/main.cpp:509

Built with libuv-1.44.2-2.fc37.x86_64.

@weyrick
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weyrick commented Jun 9, 2023

TCP is supported - something must not be building right

@pemensik
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pemensik commented Jun 9, 2023

Not sure why that happens. If I choose server on address where is nothing listening, it starts.

But not when there is something listening.

binding to 0.0.0.0                                                                                                                      
flaming target(s) [127.0.0.1] on port 53 with 30 concurrent generators, each sending 100 queries every 1000ms on protocol tcp
query generator [numberqname] contains 0 record(s)
terminate called after throwing an instance of 'std::runtime_error'
  what():  tcp unsupported

Program received signal SIGABRT, Aborted.
__pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
Downloading source file /usr/src/debug/glibc-2.37-4.fc38.x86_64/nptl/pthread_kill.c
44            return INTERNAL_SYSCALL_ERROR_P (ret) ? INTERNAL_SYSCALL_ERRNO (ret) : 0;                                                 
(gdb) bt
#0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#1  0x00007ffff76b08b3 in __pthread_kill_internal (signo=6, threadid=<optimized out>) at pthread_kill.c:78
#2  0x00007ffff765fabe in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#3  0x00007ffff764887f in __GI_abort () at abort.c:79
#4  0x00007ffff78a4cf9 in __gnu_cxx::__verbose_terminate_handler () at ../../../../libstdc++-v3/libsupc++/vterminate.cc:95
#5  0x00007ffff78b4f6c in __cxxabiv1::__terminate (handler=<optimized out>) at ../../../../libstdc++-v3/libsupc++/eh_terminate.cc:48
#6  0x00007ffff78b3fe9 in __cxa_call_terminate (ue_header=0x61e820) at ../../../../libstdc++-v3/libsupc++/eh_call.cc:54
#7  0x00007ffff78b46f6 in __cxxabiv1::__gxx_personality_v0 (version=<optimized out>, actions=6, exception_class=5138137972254386944, 
    ue_header=<optimized out>, context=0x7fffffff9040) at ../../../../libstdc++-v3/libsupc++/eh_personality.cc:688
#8  0x00007ffff7ef5aa9 in _Unwind_RaiseException_Phase2 (exc=exc@entry=0x61e820, context=context@entry=0x7fffffff9040, 
    frames_p=frames_p@entry=0x7fffffff8f48) at ../../../libgcc/unwind.inc:64
#9  0x00007ffff7ef659d in _Unwind_Resume (exc=0x61e820) at ../../../libgcc/unwind.inc:242
#10 0x00000000004ad2ba in uvw::Request<uvw::details::ConnectReq, uv_connect_s>::defaultCallback<uvw::ConnectEvent> (req=0x5a38e8, 
    status=0) at /home/pemensik/upstream/flamethrower/3rd/uvw/uvw/request.hpp:28
#11 0x00007ffff7f91ca7 in uv__stream_connect (stream=0x59ce10) at src/unix/stream.c:1345
#12 uv__stream_io (loop=<optimized out>, w=0x59ce98, events=4) at src/unix/stream.c:1262
#13 0x00007ffff7f96873 in uv__io_poll (loop=0x7ffff7fa1160 <default_loop_struct>, timeout=<optimized out>) at src/unix/epoll.c:374
#14 0x00007ffff7f7f60a in uv__io_poll (timeout=<optimized out>, loop=0x7ffff7fa1160 <default_loop_struct>) at src/unix/udp.c:122
#15 uv_run (loop=0x7ffff7fa1160 <default_loop_struct>, mode=UV_RUN_DEFAULT) at src/unix/core.c:406
#16 0x0000000000467abb in uvw::Loop::run<(uvw::details::UVRunMode)0> (this=0x5a1f30)
    at /home/pemensik/upstream/flamethrower/3rd/uvw/uvw/loop.hpp:307
#17 0x0000000000460c67 in main (argc=8, argv=0x7fffffffddc8) at /home/pemensik/upstream/flamethrower/flame/main.cpp:503

But running on not-responding target starts fine.

$ ./flame -P tcp -g numberqname -r test. 127.0.0.2
binding to 0.0.0.0
flaming target(s) [127.0.0.2] on port 53 with 30 concurrent generators, each sending 100 queries every 1000ms on protocol tcp
query generator [numberqname] contains 0 record(s)
0.789971s: send: 0, avg send: 0, recv: 0, avg recv: 0, min/avg/max resp: 0/-nan/0ms, in flight: 0, timeouts: 0
1.79071s: send: 0, avg send: 0, recv: 0, avg recv: 0, min/avg/max resp: 0/-nan/0ms, in flight: 0, timeouts: 0
2.79089s: send: 0, avg send: 0, recv: 0, avg recv: 0, min/avg/max resp: 0/-nan/0ms, in flight: 0, timeouts: 0
^C3.29046s: send: 0, avg send: 0, recv: 0, avg recv: 0, min/avg/max resp: 0/-nan/0ms, in flight: 0, timeouts: 0

------
run id      : 7fffcd6820f0
run start   : 2023-06-09T22:52:29Z
runtime     : 3.2922 s
total sent  : 0
total rcvd  : 0
min resp    : 0 ms
avg resp    : -nan ms
max resp    : 0 ms
avg r qps   : 0
avg s qps   : 0
avg pkt     : 0 bytes
tcp conn.   : 0
timeouts    : 0 (-nan%) 
bad recv    : 0
net errors  : 0

Trying tag v0.11.0 with Compile under gcc 12.0.0

@pspacek
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pspacek commented Jan 11, 2024 •
edited
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That's a red herring. The error message is confusing but the source of the problem is misconfiguration.

Try flame -P tcp -g "numberqname low=0 high=2" -r test. 127.0.0.2 (note the ").

@pemensik
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Oh, interesting. Both flame -P tcp -g "numberqname low=0 high=2" -r test. 127.0.0.2 and flame -P tcp -g "numberqname low=0 high=2" -r test. 127.0.0.1 with unbound running locally pass just fine and the latter actually measuring something.

Does that mean we are lacking some smart defaults for numberqname and report it by crashing?

@pemensik
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Interesting. Even specification what should be already be default does make it working well:
flame -P tcp -g "numberqname low=0" -r test. 127.0.0.1 works nicely. According to man flame low should default to 0 already, so it should behave exactly the same way as if it were missing. But it is different for some reason.

Tested version: flamethrower-0.11.0-24.fc38.x86_64

@pspacek pspacek changed the title Is TCP support completely missing? numberqname generator error handling is confusing Feb 27, 2024
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@weyrick @pspacek @pemensik