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Ruby Segmentation Fault #3352

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blowmage opened this issue Jul 11, 2017 · 19 comments
Closed

Ruby Segmentation Fault #3352

blowmage opened this issue Jul 11, 2017 · 19 comments
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ruby

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@blowmage
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blowmage commented Jul 11, 2017 •
edited

I have a Segmentation Fault report. This has happened while performance testing changes to the Google Cloud Pub/Sub Ruby library. This happened right after the segfault reported in grpc/grpc#11762.

System details:

  • gRPC language and version: grpc (1.4.1 universal-darwin)
  • Operating System: MacOS Sierra
  • Runtime version: ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-darwin16]
  • Protobuf version: google-protobuf (3.3.0 universal-darwin)
segfault details 
/Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:343: [BUG] Segmentation fault at 0x00000000000008
ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-darwin16]

-- Crash Report log information --------------------------------------------
   See Crash Report log file under the one of following:                    
     * ~/Library/Logs/CrashReporter                                         
     * /Library/Logs/CrashReporter                                          
     * ~/Library/Logs/DiagnosticReports                                     
     * /Library/Logs/DiagnosticReports                                      
   for more details.                                                        
Don't forget to include the above Crash Report log file in bug reports.     

-- Control frame information -----------------------------------------------
c:0027 p:---- s:0141 e:000140 CFUNC  :sleep
c:0026 p:0078 s:0136 e:000135 RESCUE /Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:352
c:0025 p:0031 s:0132 e:000131 BLOCK  /Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:343 [FINISH]
c:0024 p:---- s:0128 e:000127 CFUNC  :loop
c:0023 p:0073 s:0124 e:000123 BLOCK  /Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:342 [FINISH]
c:0022 p:0013 s:0115 e:000114 BLOCK  /Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:262 [FINISH]
c:0021 p:0011 s:0111 e:000110 BLOCK  /Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:224 [FINISH]
c:0020 p:0093 s:0106 e:000105 BLOCK  /Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:250 [FINISH]
c:0019 p:0048 s:0099 e:000098 METHOD /Users/blowmage/google/codez/gcloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/v1/publisher_client.rb:326
c:0018 p:0023 s:0090 e:000089 BLOCK  /Users/blowmage/google/codez/gcloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/service.rb:149
c:0017 p:0006 s:0087 e:000086 METHOD /Users/blowmage/google/codez/gcloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/service.rb:459
c:0016 p:0009 s:0082 e:000081 METHOD /Users/blowmage/google/codez/gcloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/service.rb:148
c:0015 p:0019 s:0076 e:000075 BLOCK  /Users/blowmage/google/codez/gcloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/topic/async_publisher.rb:149 [FINISH]
c:0014 p:0030 s:0071 e:000070 BLOCK  /Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/executor/safe_task_executor.rb:24
c:0013 p:0006 s:0064 e:000063 BLOCK  /Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/synchronization/mri_lockable_object.rb:38 [FINISH]
c:0012 p:---- s:0061 e:000060 CFUNC  :synchronize
c:0011 p:0027 s:0057 e:000056 METHOD /Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/synchronization/mri_lockable_object.rb:38
c:0010 p:0009 s:0053 e:000052 METHOD /Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/executor/safe_task_executor.rb:19
c:0009 p:0042 s:0048 e:000047 METHOD /Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/ivar.rb:170
c:0008 p:0014 s:0039 e:000038 BLOCK  /Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/future.rb:52 [FINISH]
c:0007 p:0013 s:0036 e:000035 METHOD /Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/executor/ruby_thread_pool_executor.rb:348
c:0006 p:0056 s:0028 e:000027 BLOCK  /Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/executor/ruby_thread_pool_executor.rb:337 [FINISH]
c:0005 p:---- s:0022 e:000021 CFUNC  :loop
c:0004 p:0009 s:0018 e:000017 BLOCK  /Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/executor/ruby_thread_pool_executor.rb:320 [FINISH]
c:0003 p:---- s:0015 e:000014 CFUNC  :catch
c:0002 p:0025 s:0010 e:000009 BLOCK  /Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/executor/ruby_thread_pool_executor.rb:319 [FINISH]
c:0001 p:---- s:0003 e:000002 (none) [FINISH]

-- Ruby level backtrace information ----------------------------------------
/Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/executor/ruby_thread_pool_executor.rb:319:in `block in create_worker'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/executor/ruby_thread_pool_executor.rb:319:in `catch'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/executor/ruby_thread_pool_executor.rb:320:in `block (2 levels) in create_worker'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/executor/ruby_thread_pool_executor.rb:320:in `loop'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/executor/ruby_thread_pool_executor.rb:337:in `block (3 levels) in create_worker'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/executor/ruby_thread_pool_executor.rb:348:in `run_task'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/future.rb:52:in `block in execute'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/ivar.rb:170:in `safe_execute'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/executor/safe_task_executor.rb:19:in `execute'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/synchronization/mri_lockable_object.rb:38:in `synchronize'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/synchronization/mri_lockable_object.rb:38:in `synchronize'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/synchronization/mri_lockable_object.rb:38:in `block in synchronize'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/concurrent-ruby-1.0.5/lib/concurrent/executor/safe_task_executor.rb:24:in `block in execute'
/Users/blowmage/google/codez/gcloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/topic/async_publisher.rb:149:in `block in publish_batch_async'
/Users/blowmage/google/codez/gcloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/service.rb:148:in `publish'
/Users/blowmage/google/codez/gcloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/service.rb:459:in `execute'
/Users/blowmage/google/codez/gcloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/service.rb:149:in `block in publish'
/Users/blowmage/google/codez/gcloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/v1/publisher_client.rb:326:in `publish'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:250:in `block in create_api_call'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:224:in `block in create_api_call'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:262:in `block in catch_errors'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:342:in `block in retryable'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:342:in `loop'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:343:in `block (2 levels) in retryable'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:352:in `rescue in block (2 levels) in retryable'
/Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/api_callable.rb:352:in `sleep'

-- Machine register context ------------------------------------------------
 rax: 0x0000000000000000 rbx: 0x00007f9c381b9a70 rcx: 0x00007f9c4265f328
 rdx: 0x0000000000000000 rdi: 0x0000700007c3e270 rsi: 0x00007f9c4265f310
 rbp: 0x0000700007c3ce30 rsp: 0x0000700007c3ce30  r8: 0x00000000ffffffff
  r9: 0x00007f9c307bd668 r10: 0xffffffffffffffff r11: 0x0000000000000202
 r12: 0x0000700007c3e270 r13: 0x0000000000000004 r14: 0x0000700007c3e270
 r15: 0x0000000000000000 rip: 0x0000000105db9160 rfl: 0x0000000000010202

-- C level backtrace information -------------------------------------------
0   ruby                                0x00000001053f8d92 rb_vm_bugreport + 386
1   ruby                                0x0000000105299b5c rb_bug_context + 476
2   ruby                                0x0000000105377645 sigsegv + 69
3   libsystem_platform.dylib            0x00007fff9015eb3a _sigtramp + 26
4   grpc_c.bundle                       0x0000000105db9160 grpc_slice_unref_internal + 16
5   grpc_c.bundle                       0x0000000105de794a build_auth_metadata_context + 1386
6   grpc_c.bundle                       0x0000000105da0d5c grpc_call_stack_destroy + 76
7   grpc_c.bundle                       0x0000000105df88e4 grpc_connected_subchannel_create_call + 324
8   grpc_c.bundle                       0x0000000105dab164 grpc_exec_ctx_flush + 84
9   grpc_c.bundle                       0x0000000105da9370 grpc_init_poll_cv_posix + 4800
10  grpc_c.bundle                       0x0000000105daae34 grpc_pollset_work + 36
11  grpc_c.bundle                       0x0000000105dc33c2 grpc_cq_can_listen + 2642
12  grpc_c.bundle                       0x0000000105d9cc68 rb_completion_queue_pluck + 248
13  ruby                                0x00000001053aaa18 rb_thread_call_without_gvl + 88
14  grpc_c.bundle                       0x0000000105d9cbd8 rb_completion_queue_pluck + 104
15  grpc_c.bundle                       0x0000000105d997e2 Init_grpc_call + 3874
16  ruby                                0x00000001053ec636 vm_call_cfunc + 278
17  ruby                                0x00000001053d76c8 vm_exec_core + 11352
18  ruby                                0x00000001053e729c vm_exec + 108
19  ruby                                0x00000001053f4a80 invoke_iseq_block_from_c + 1040
20  ruby                                0x00000001053f394b vm_call0_body + 2011
21  ruby                                0x00000001053e1173 rb_vm_call + 51
22  ruby                                0x00000001053ec636 vm_call_cfunc + 278
23  ruby                                0x00000001053d76c8 vm_exec_core + 11352
24  ruby                                0x00000001053e729c vm_exec + 108
25  ruby                                0x00000001053e5b89 vm_invoke_proc + 297
26  ruby                                0x00000001053edc02 vm_call_opt_call + 162
27  ruby                                0x00000001053d76c8 vm_exec_core + 11352
28  ruby                                0x00000001053e729c vm_exec + 108
29  ruby                                0x00000001053f4428 invoke_block_from_c_splattable + 344
30  ruby                                0x00000001053f550f loop_i + 31
31  ruby                                0x00000001052a3768 rb_rescue2 + 296
32  ruby                                0x00000001053ec636 vm_call_cfunc + 278
33  ruby                                0x00000001053d6fb7 vm_exec_core + 9543
34  ruby                                0x00000001053e729c vm_exec + 108
35  ruby                                0x00000001053e5b89 vm_invoke_proc + 297
36  ruby                                0x00000001053edc02 vm_call_opt_call + 162
37  ruby                                0x00000001053d76c8 vm_exec_core + 11352
38  ruby                                0x00000001053e729c vm_exec + 108
39  ruby                                0x00000001053e5b89 vm_invoke_proc + 297
40  ruby                                0x00000001053edc02 vm_call_opt_call + 162
41  ruby                                0x00000001053d76c8 vm_exec_core + 11352
42  ruby                                0x00000001053e729c vm_exec + 108
43  ruby                                0x00000001053e5b89 vm_invoke_proc + 297
44  ruby                                0x00000001053edc02 vm_call_opt_call + 162
45  ruby                                0x00000001053d76c8 vm_exec_core + 11352
46  ruby                                0x00000001053e729c vm_exec + 108
47  ruby                                0x00000001053e5b89 vm_invoke_proc + 297
48  ruby                                0x00000001053edc02 vm_call_opt_call + 162
49  ruby                                0x00000001053d76c8 vm_exec_core + 11352
50  ruby                                0x00000001053e729c vm_exec + 108
51  ruby                                0x00000001053e5b89 vm_invoke_proc + 297
52  ruby                                0x00000001053edc02 vm_call_opt_call + 162
53  ruby                                0x00000001053d76c8 vm_exec_core + 11352
54  ruby                                0x00000001053e729c vm_exec + 108
55  ruby                                0x00000001053f4428 invoke_block_from_c_splattable + 344
56  ruby                                0x00000001052a3b14 rb_ensure + 180
57  ruby                                0x00000001053ec636 vm_call_cfunc + 278
58  ruby                                0x00000001053d6fb7 vm_exec_core + 9543
59  ruby                                0x00000001053e729c vm_exec + 108
60  ruby                                0x00000001053e5b89 vm_invoke_proc + 297
61  ruby                                0x00000001053edc02 vm_call_opt_call + 162
62  ruby                                0x00000001053d76c8 vm_exec_core + 11352
63  ruby                                0x00000001053e729c vm_exec + 108
64  ruby                                0x00000001053f4428 invoke_block_from_c_splattable + 344
65  ruby                                0x00000001053f550f loop_i + 31
66  ruby                                0x00000001052a3768 rb_rescue2 + 296
67  ruby                                0x00000001053ec636 vm_call_cfunc + 278
68  ruby                                0x00000001053d6fb7 vm_exec_core + 9543
69  ruby                                0x00000001053e729c vm_exec + 108
70  ruby                                0x00000001053f4428 invoke_block_from_c_splattable + 344
71  ruby                                0x00000001053f54ca catch_i + 74
72  ruby                                0x00000001053e3f7e vm_catch_protect + 174
73  ruby                                0x00000001053e4642 rb_f_catch + 66
74  ruby                                0x00000001053ec636 vm_call_cfunc + 278
75  ruby                                0x00000001053d6fb7 vm_exec_core + 9543
76  ruby                                0x00000001053e729c vm_exec + 108
77  ruby                                0x00000001053e5b89 vm_invoke_proc + 297
78  ruby                                0x00000001053b105c thread_start_func_2 + 1564
79  ruby                                0x00000001053b0a25 thread_start_func_1 + 165
80  libsystem_pthread.dylib             0x00007fff9016893b _pthread_body + 180
81  libsystem_pthread.dylib             0x00007fff90168887 _pthread_body + 0

-- Other runtime information -----------------------------------------------

* Loaded script: bench_publish.rb

* Loaded features:

    0 enumerator.so
    1 thread.rb
    2 rational.so
    3 complex.so
    4 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/x86_64-darwin16/enc/encdb.bundle
    5 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/x86_64-darwin16/enc/trans/transdb.bundle
    6 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/unicode_normalize.rb
    7 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/x86_64-darwin16/rbconfig.rb
    8 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/compatibility.rb
    9 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/defaults.rb
   10 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/deprecate.rb
   11 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/errors.rb
   12 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/version.rb
   13 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/requirement.rb
   14 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/platform.rb
   15 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/basic_specification.rb
   16 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/stub_specification.rb
   17 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/util/list.rb
   18 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/x86_64-darwin16/stringio.bundle
   19 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/specification.rb
   20 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/exceptions.rb
   21 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/dependency.rb
   22 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/core_ext/kernel_gem.rb
   23 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/monitor.rb
   24 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb
   25 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems.rb
   26 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/path_support.rb
   27 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/version.rb
   28 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/core_ext/name_error.rb
   29 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/levenshtein.rb
   30 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/jaro_winkler.rb
   31 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/spell_checker.rb
   32 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/delegate.rb
   33 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/spell_checkers/name_error_checkers/class_name_checker.rb
   34 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/spell_checkers/name_error_checkers/variable_name_checker.rb
   35 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/spell_checkers/name_error_checkers.rb
   36 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/spell_checkers/method_name_checker.rb
   37 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/spell_checkers/null_checker.rb
   38 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean/formatter.rb
   39 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0/lib/did_you_mean.rb
   40 /Users/blowmage/.gem/repos/gcloud-ruby/gems/bundler-1.15.1/lib/bundler/vendor/postit/lib/postit/parser.rb
   41 /Users/blowmage/.gem/repos/gcloud-ruby/gems/bundler-1.15.1/lib/bundler/vendor/postit/lib/postit/environment.rb
   42 /Users/blowmage/.gem/repos/gcloud-ruby/gems/bundler-1.15.1/lib/bundler/vendor/postit/lib/postit/installer.rb
   43 /Users/blowmage/.gem/repos/gcloud-ruby/gems/bundler-1.15.1/lib/bundler/vendor/postit/lib/postit/version.rb
   44 /Users/blowmage/.gem/repos/gcloud-ruby/gems/bundler-1.15.1/lib/bundler/vendor/postit/lib/postit.rb
   45 /Users/blowmage/.gem/repos/gcloud-ruby/gems/bundler-1.15.1/lib/bundler/postit_trampoline.rb
   46 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/x86_64-darwin16/pathname.bundle
   47 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/pathname.rb
   48 /Users/blowmage/.gem/repos/gcloud-ruby/gems/bundler-1.15.1/lib/bundler/constants.rb
   49 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/util.rb
   50 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/x86_64-darwin16/io/console.bundle
   51 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/user_interaction.rb
   52 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/x86_64-darwin16/etc.bundle
   53 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/rubygems/config_file.rb
   54 /Users/blowmage/.gem/repos/gcloud-ruby/gems/bundler-1.15.1/lib/bundler/rubygems_integration.rb
   55 /Users/blowmage/.gem/repos/gcloud-ruby/gems/bundler-1.15.1/lib/bundler/current_ruby.rb
   56 /Users/blowmage/.gem/repos/gcloud-ruby/gems/bundler-1.15.1/lib/bundler/shared_helpers.rb
   57 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/fileutils.rb
   58 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/tmpdir.rb
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  460 /Users/blowmage/.gem/repos/gcloud-ruby/gems/grpc-1.4.1-universal-darwin/src/ruby/lib/grpc/core/time_consts.rb
  461 /Users/blowmage/.rubies/ruby-2.4.0/lib/ruby/2.4.0/weakref.rb
  462 /Users/blowmage/.gem/repos/gcloud-ruby/gems/grpc-1.4.1-universal-darwin/src/ruby/lib/grpc/generic/bidi_call.rb
  463 /Users/blowmage/.gem/repos/gcloud-ruby/gems/grpc-1.4.1-universal-darwin/src/ruby/lib/grpc/generic/active_call.rb
  464 /Users/blowmage/.gem/repos/gcloud-ruby/gems/grpc-1.4.1-universal-darwin/src/ruby/lib/grpc/generic/client_stub.rb
  465 /Users/blowmage/.gem/repos/gcloud-ruby/gems/grpc-1.4.1-universal-darwin/src/ruby/lib/grpc/generic/rpc_desc.rb
  466 /Users/blowmage/.gem/repos/gcloud-ruby/gems/grpc-1.4.1-universal-darwin/src/ruby/lib/grpc/generic/service.rb
  467 /Users/blowmage/.gem/repos/gcloud-ruby/gems/grpc-1.4.1-universal-darwin/src/ruby/lib/grpc/generic/rpc_server.rb
  468 /Users/blowmage/.gem/repos/gcloud-ruby/gems/grpc-1.4.1-universal-darwin/src/ruby/lib/grpc.rb
  469 /Users/blowmage/.gem/repos/gcloud-ruby/gems/google-gax-0.8.4/lib/google/gax/grpc.rb
  470 /Users/blowmage/.gem/repos/gcloud-ruby/gems/grpc-google-iam-v1-0.6.8/lib/google/iam/v1/iam_policy_services_pb.rb
  471 /Users/blowmage/google/codez/gcloud-ruby/google-cloud-pubsub/lib/google/pubsub/v1/pubsub_services_pb.rb

[NOTE]
You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome.
For details: http://www.ruby-lang.org/bugreport.html
This was referenced Jul 11, 2017
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@TeBoring TeBoring added the ruby label Aug 18, 2017
@danoscarmike
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@blowmage the grpc team is unable to reproduce the segfault in grpc/grpc#11762:

unable to trigger a segfault in more than 100 runs of the repo posted in grpc issue #11762 using a message count of 10K and a message size of 4K

Could you provide more detail or another case that they might be able to reproduce?

@lukesneeringer @geigerj

@blowmage
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I can't. We haven't determined any antecedent for the segfaults. They seem to happen randomly.

@danoscarmike
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K. Thanks Mike!

@lukesneeringer
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@blowmage Can you provide code that (sometimes) shows it?

@blowmage
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The code is the same as on grpc/grpc#11762.

@TeBoring
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I am trying to use valgrind to see whether the c extension has some memory problem.
However, using valgrind with ruby shows tons of memory error. Does any one know how to overcome this?

@TeBoring
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Fixed in #3560.

@TeBoring
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TeBoring commented Oct 4, 2017

Seems like this is a bug of grpc.

@geigerj
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geigerj commented Oct 4, 2017

@TeBoring @apolcyn The equivalent gRPC issue (grpc/grpc#11762) was closed because "the probable cause" seemed to be in protobuf. Is there a way to determine the root cause and re-open the appropriate issue?

@TeBoring
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TeBoring commented Oct 4, 2017

From the c level backtrace, it seems the bug is in grpc.

@apolcyn
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apolcyn commented Oct 4, 2017

I agree that from the stack trace, it does appear to be coming from within grpc. Is the crash described in grpc/grpc#11762 still occuring? If so, I think we should look into. But it would be really helpful to get a repro case in order to dig in.

@TeBoring
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TeBoring commented Oct 4, 2017

#3649 may give some hint.

@apolcyn
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apolcyn commented Oct 4, 2017

ok, good idea I can look into the grpc crash using the repro in grpc/grpc#11762 and GC stress modes.

@apolcyn
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apolcyn commented Oct 5, 2017 •
edited

To update here, I'm not seeing the segfault but I am seeing a different and suspicious error that looks like it's related to grpc.

Using a variant of the script from grpc/grpc#11762 (running from the pubsub branch of https://github.com/GoogleCloudPlatform/google-cloud-ruby.git - this is the correct branch to use correct?)

Running on mac, from the google-cloud-pubsub directory, doing a bundle install and a bundle exec repro.rb:

repro.rb looking like:

# repro https://github.com/grpc/grpc/issues/11762

require "google/cloud/pubsub"
require "securerandom"

TOPIC = # my topic
SUBSCRIPTION = # my subscription

message_count = 10000
message_bytes = 4

p = Google::Cloud::Pubsub.new(project: # my project)
t = p.topic TOPIC
s = t.subscription SUBSCRIPTION
t.delete if t
s.delete if s
t = p.create_topic TOPIC
s = t.create_subscription SUBSCRIPTION

message_count.times do |i|
  t.publish_async SecureRandom.random_bytes(message_bytes*1024)
end

t.async_publisher.stop.wait!

When turning on GC.stress to x01 or x04 in that script (on mac), I can consistently see this failure (which looks like it is coming from grpc):

/google-cloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/service.rb:55:in `initialize': wrong argument type Module (expected mutex) (TypeError)
	from /google-cloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/service.rb:55:in `new'
	from /Users/apolcyn/google-cloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/service.rb:55:in `chan_creds'
	from /google-cloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/service.rb:44:in `channel'
	from /google-cloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/service.rb:78:in `publisher'
	from /google-cloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/service.rb:98:in `block in get_topic'
	from /google-cloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/service.rb:459:in `execute'
	from /google-cloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/service.rb:97:in `get_topic'
	from /google-cloud-ruby/google-cloud-pubsub/lib/google/cloud/pubsub/project.rb:163:in `topic'
	from repro.rb:15:in `<main>'

@apolcyn
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apolcyn commented Oct 5, 2017

Running under GC.stress = 0x04 appears to reveal multiple issues that are definitely purely in the grpc/ruby extension.

I can't say if I am seeing the root cause of the original issue here, but I suspect it is related, WIP on this....

@apolcyn apolcyn mentioned this issue Oct 5, 2017
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@apolcyn
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apolcyn commented Oct 5, 2017 •
edited

grpc/grpc#12842 fixes the issue mentioned in my comment above, this was just released in 1.6.6, along with two other bug fixes.

@apolcyn
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apolcyn commented Oct 5, 2017 •
edited

With the grpc 1.6.6 release, the repro script here now runs cleanly under GC.stress = 0x04 (the mode triggering the earlier bugs). I'm thinking that there's it's likely the 1.6.6 release fixes the issue seen here - or I am not certain, but there is possibility of it.

@TeBoring
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TeBoring commented Oct 5, 2017

Is the stack trace here relevant?

@apolcyn
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apolcyn commented Oct 5, 2017

This issue definitely came from within grpc... I am not sure what the root of it is atm.

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@blowmage @lukesneeringer @danoscarmike @TeBoring @apolcyn @geigerj