Comments (8)
larskanis
commented on August 22, 2024
1
@bellebaum I should have written you, but the messages in your log kind of message type 0x31 arrived from server while idle are a pretty safe sign of running multiple threads at the same time on a single connection. I'll ask the PostgreSQL people if we can make this message a bit more descriptive.
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bellebaum
commented on August 22, 2024
1
@larskanis Thank you :)
Judging by the comments, this seems to be a common misconception, to think that this gem could be used in rails, sinatra, etc. without any wrapper.
Maybe we should add a warning in the README to use something like the connection pool gem when accessing this gem from multiple threads.
One could, of course, also just add proper locks to this gem, but I think this would be overkill. Still, as it stands, the internal ruby backtraces are quite scary and without any warnings it is hard to distinguish actual bugs from misuse of this gem. Keep in mind that many Ruby programmers are not C programmers, and so finding the right documentation (probably the C pg client docs) may be hard for them.
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tadman
commented on August 22, 2024
1
I experienced this mystery crash with pg when using Tapioca to generate RBI files, and nothing seemed to fix it apart from reverting to 1.3.0, excepting this helpful note suggesting setting this environment variable:
export PGGSSENCMODE="disable"
Which for me resolves the issue.
None of the versions between 1.3.1 and 1.5.4 worked without this variable set, at least on Ruby 3.2.2 (macOS ARM).
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WormerKing
commented on August 22, 2024
Hello.
The same error occurred to me and I am getting a core dumped error.
I couldn't solve this error (or whatever) can you help me ?
ruby 3.0.1
rails 6.1.7
pg 1.4.5
Error:
logs.txt
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olegsobchuk
commented on August 22, 2024
The same Issue for me
-- Control frame information -----------------------------------------------
c:0064 p:---- s:0369 e:000368 CFUNC :connect_poll
c:0063 p:0543 s:0365 e:000364 METHOD .../.rvm/gems/ruby-3.0.0/gems/pg-1.4.4/lib/pg/connection.rb:626
c:0062 p:0341 s:0352 e:000351 METHOD .../.rvm/gems/ruby-3.0.0/gems/pg-1.4.4/lib/pg/connection.rb:759
c:0061 p:0007 s:0341 e:000340 METHOD .../.rvm/gems/ruby-3.0.0/gems/pg-1.4.4/lib/pg/connection.rb:695
c:0060 p:0019 s:0335 e:000334 METHOD .../.rvm/gems/ruby-3.0.0/gems/pg-1.4.4/lib/pg.rb:69
c:0059 p:0013 s:0329 e:000328 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/connection_adapters/postgresql_adapter.rb:78
c:0058 p:0112 s:0323 e:000321 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/connection_adapters/postgresql_adapter.rb:37 [FINISH]
c:0057 p:---- s:0315 e:000314 CFUNC :public_send
c:0056 p:0021 s:0309 e:000308 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:882
c:0055 p:0021 s:0305 e:000304 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:926
c:0054 p:0014 s:0301 e:000300 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:905
c:0053 p:0012 s:0295 e:000294 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:866
c:0052 p:0011 s:0289 e:000287 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:588
c:0051 p:0021 s:0283 e:000279 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:428
c:0050 p:0291 s:0276 e:000275 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:112
c:0049 p:0014 s:0266 e:000265 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/connection_handling.rb:327
c:0048 p:0003 s:0262 e:000261 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/connection_handling.rb:283
c:0047 p:0027 s:0258 e:000257 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/tasks/postgresql_database_tasks.rb:12
c:0046 p:0015 s:0250 e:000249 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/tasks/postgresql_database_tasks.rb:26
c:0045 p:0018 s:0245 e:000244 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/tasks/database_tasks.rb:133
c:0044 p:0006 s:0237 e:000236 BLOCK .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/tasks/database_tasks.rb:193
c:0043 p:0024 s:0233 e:000232 BLOCK .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/tasks/database_tasks.rb:506 [FINISH]
c:0042 p:---- s:0229 e:000228 CFUNC :each
c:0041 p:0023 s:0225 e:000224 BLOCK .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/tasks/database_tasks.rb:503 [FINISH]
c:0040 p:---- s:0221 e:000220 CFUNC :each
c:0039 p:0063 s:0217 e:000216 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/tasks/database_tasks.rb:502
c:0038 p:0016 s:0210 e:000209 METHOD .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/tasks/database_tasks.rb:193
c:0037 p:0020 s:0204 e:000203 BLOCK .../.rvm/gems/ruby-3.0.0/gems/activerecord-6.1.7.2/lib/active_record/railties/databases.rake:45
c:0036 p:0008 s:0201 e:000200 BLOCK .../.rvm/gems/ruby-3.0.0/gems/rake-13.0.6/lib/rake/task.rb:281 [FINISH]
c:0035 p:---- s:0197 e:000196 CFUNC :each
c:0034 p:0142 s:0193 e:000192 METHOD .../.rvm/gems/ruby-3.0.0/gems/rake-13.0.6/lib/rake/task.rb:281
c:0033 p:0137 s:0187 E:000268 BLOCK .../.rvm/gems/ruby-3.0.0/gems/rake-13.0.6/lib/rake/task.rb:219 [FINISH]
c:0032 p:---- s:0183 e:000182 CFUNC :synchronize
c:0031 p:0026 s:0179 E:000238 METHOD .../.rvm/gems/ruby-3.0.0/gems/rake-13.0.6/lib/rake/task.rb:199
c:0030 p:0036 s:0172 E:0002a0 METHOD .../.rvm/gems/ruby-3.0.0/gems/rake-13.0.6/lib/rake/task.rb:188
c:0029 p:0027 s:0166 E:0002d0 METHOD .../.rvm/gems/ruby-3.0.0/gems/rake-13.0.6/lib/rake/application.rb:160
c:0028 p:0006 s:0158 E:000338 BLOCK .../.rvm/gems/ruby-3.0.0/gems/rake-13.0.6/lib/rake/application.rb:116 [FINISH]
c:0027 p:---- s:0154 e:000153 CFUNC :each
c:0026 p:0029 s:0150 E:000300 BLOCK .../.rvm/gems/ruby-3.0.0/gems/rake-13.0.6/lib/rake/application.rb:116
c:0025 p:0019 s:0147 E:000398 METHOD .../.rvm/gems/ruby-3.0.0/gems/rake-13.0.6/lib/rake/application.rb:125
c:0024 p:0004 s:0142 E:0002d0 METHOD .../.rvm/gems/ruby-3.0.0/gems/rake-13.0.6/lib/rake/application.rb:110
c:0023 p:0005 s:0138 E:000430 BLOCK .../.rvm/gems/ruby-3.0.0/gems/railties-6.1.7.2/lib/rails/commands/rake/rake_command.rb:24
c:0022 p:0002 s:0135 E:000498 METHOD .../.rvm/gems/ruby-3.0.0/gems/rake-13.0.6/lib/rake/application.rb:186
c:0021 p:0087 s:0130 E:000408 BLOCK .../.rvm/gems/ruby-3.0.0/gems/railties-6.1.7.2/lib/rails/commands/rake/rake_command.rb:24
c:0020 p:0048 s:0126 E:000500 METHOD .../.rvm/gems/ruby-3.0.0/gems/rake-13.0.6/lib/rake/rake_module.rb:59
c:0019 p:0016 s:0120 E:0003d8 METHOD .../.rvm/gems/ruby-3.0.0/gems/railties-6.1.7.2/lib/rails/commands/rake/rake_command.rb:18
c:0018 p:0164 s:0113 E:000570 METHOD .../.rvm/gems/ruby-3.0.0/gems/railties-6.1.7.2/lib/rails/command.rb:50
c:0017 p:0063 s:0101 E:0005b0 TOP .../.rvm/gems/ruby-3.0.0/gems/railties-6.1.7.2/lib/rails/commands.rb:18 [FINISH]
c:0016 p:---- s:0096 e:000095 CFUNC :require
c:0015 p:0258 s:0091 E:000610 METHOD .../.rvm/gems/ruby-3.0.0/gems/bootsnap-1.16.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32
c:0014 p:0051 s:0081 E:000648 TOP .../bin/rails:9 [FINISH]
c:0013 p:---- s:0077 e:000076 CFUNC :load
c:0012 p:0130 s:0072 E:000678 METHOD .../.rvm/gems/ruby-3.0.0/gems/spring-2.1.1/lib/spring/client/rails.rb:28
c:0011 p:0007 s:0067 E:0006a8 METHOD .../.rvm/gems/ruby-3.0.0/gems/spring-2.1.1/lib/spring/client/command.rb:7
c:0010 p:0011 s:0062 E:0006e0 METHOD .../.rvm/gems/ruby-3.0.0/gems/spring-2.1.1/lib/spring/client.rb:30
c:0009 p:0302 s:0056 E:000728 TOP .../.rvm/gems/ruby-3.0.0/gems/spring-2.1.1/bin/spring:49 [FINISH]
c:0008 p:---- s:0050 e:000049 CFUNC :load
c:0007 p:0114 s:0045 E:000768 TOP .../.rvm/gems/ruby-3.0.0/gems/spring-2.1.1/lib/spring/binstub.rb:11 [FINISH]
c:0006 p:---- s:0039 e:000038 CFUNC :require
c:0005 p:0195 s:0034 E:001d28 METHOD <internal:.../.rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb>:85
c:0004 p:0129 s:0017 E:0007a0 TOP .../bin/spring:15 [FINISH]
c:0003 p:---- s:0012 e:000011 CFUNC :load
c:0002 p:0018 s:0007 E:000fe8 EVAL bin/rails:3 [FINISH]
c:0001 p:0000 s:0003 E:000510 (none) [FINISH]
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alexnavarra
commented on August 22, 2024
the same issue with 1.4.2 v when trying to connect remote db. Ruby: 3.0.0, Rails 7, Ubuntu 22.04, openssl 3
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bellebaum
commented on August 22, 2024
For me, the issue turned out to be missing thread safety in this gem. Maybe a warning should help?
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RichardsonWTR
commented on August 22, 2024
Running Ubuntu 22.04
Ruby 2.7.1
Rails 5.2.6
Take a look at this command ran on the rails console
[2] pry(main)> PG::Connection.new(host: 'myhost', user: 'postgres', password: '123', dbname: 'mydb')
(pry):2: [BUG] Segmentation fault at 0x00007f046937d140
ruby 2.7.1p83 (2020-03-31 revision a0c7c23c9c) [x86_64-linux]
-- Control frame information -----------------------------------------------
c:0036 p:---- s:0203 e:000202 CFUNC :initialize
c:0035 p:---- s:0200 e:000199 CFUNC :new
c:0034 p:0023 s:0195 e:000194 EVAL (pry):2 [FINISH]
c:0033 p:---- s:0192 e:000191 CFUNC :eval
c:0032 p:0042 s:0185 e:000184 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/pry-0.14.1/lib/pry/pry_instance.rb:290
c:0031 p:0240 s:0179 e:000178 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/pry-0.14.1/lib/pry/pry_instance.rb:659
c:0030 p:0010 s:0168 e:000167 BLOCK /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/pry-0.14.1/lib/pry/pry_instance.rb:261 [FINISH]
c:0029 p:---- s:0165 e:000164 CFUNC :catch
c:0028 p:0007 s:0160 e:000159 BLOCK /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/pry-0.14.1/lib/pry/pry_instance.rb:260 [FINISH]
c:0027 p:---- s:0157 e:000156 CFUNC :catch
c:0026 p:0021 s:0152 e:000151 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/pry-0.14.1/lib/pry/pry_instance.rb:259
c:0025 p:0054 s:0144 e:000143 BLOCK /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/pry-0.14.1/lib/pry/repl.rb:77 [FINISH]
c:0024 p:---- s:0140 e:000139 CFUNC :loop
c:0023 p:0004 s:0136 E:002650 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/pry-0.14.1/lib/pry/repl.rb:67
c:0022 p:0004 s:0132 E:0012f0 BLOCK /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/pry-0.14.1/lib/pry/repl.rb:38
c:0021 p:0010 s:0129 E:001d20 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/pry-0.14.1/lib/pry/input_lock.rb:61
c:0020 p:0023 s:0125 E:002260 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/pry-0.14.1/lib/pry/input_lock.rb:78
c:0019 p:0024 s:0119 E:0002c0 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/pry-0.14.1/lib/pry/repl.rb:38
c:0018 p:0018 s:0115 E:002008 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/pry-0.14.1/lib/pry/repl.rb:15
c:0017 p:0191 s:0110 E:0020a8 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/pry-0.14.1/lib/pry/pry_class.rb:188
c:0016 p:0177 s:0103 E:0020d0 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/railties-5.2.6/lib/rails/commands/console/console_command.rb:64
c:0015 p:0009 s:0099 E:002108 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/railties-5.2.6/lib/rails/commands/console/console_command.rb:19
c:0014 p:0058 s:0094 E:0024a0 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/railties-5.2.6/lib/rails/commands/console/console_command.rb:96
c:0013 p:0054 s:0090 E:0012a0 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/thor-1.1.0/lib/thor/command.rb:27
c:0012 p:0040 s:0082 E:001a68 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/thor-1.1.0/lib/thor/invocation.rb:127
c:0011 p:0235 s:0075 E:0003d8 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/thor-1.1.0/lib/thor.rb:392
c:0010 p:0045 s:0062 E:0023e8 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/railties-5.2.6/lib/rails/command/base.rb:69
c:0009 p:0122 s:0055 E:000ed8 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/railties-5.2.6/lib/rails/command.rb:46
c:0008 p:0063 s:0044 E:000950 TOP /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/railties-5.2.6/lib/rails/commands.rb:18 [FINISH]
c:0007 p:---- s:0039 e:000038 CFUNC :require
c:0006 p:0012 s:0034 E:0016e0 BLOCK /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/bootsnap-1.9.3/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23
c:0005 p:0039 s:0031 E:001f98 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/bootsnap-1.9.3/lib/bootsnap/load_path_cache/loaded_features_index.rb:100
c:0004 p:0025 s:0020 E:002310 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/bootsnap-1.9.3/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22
c:0003 p:0065 s:0014 E:0008f0 METHOD /home/mypersonalfolder/.rvm/gems/ruby-2.7.1/gems/bootsnap-1.9.3/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31
c:0002 p:0031 s:0006 E:000560 EVAL bin/rails:4 [FINISH]
c:0001 p:0000 s:0003 E:001f00 (none) [FINISH]... And more hundreds of lines in the console that I've omitted here to be brief
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Related Issues (20)
- Release pg-1.5.0 HOT 5
- `certs/larskanis-2023.pem` in version 1.4.6 has 0600 permissions HOT 1
- PG::Coder.new(hash) is deprecated HOT 6
- Timezone timestamp decoder behavior mismatch with hash vs. keyword arguments on v1.5.0 HOT 1
- PG 1.5.0 may have broken COPY exports HOT 2
- Seg fault after upgrading to pg v1.5.2 HOT 3
- Saw Rails DB connection pool spike after upgrading from 1.4.6 to 1.5.2 HOT 5
- failed to install pg 1.4.6 on Centos7 with ruby 3.2.0, whereas with ruby 3.1.0 it installs HOT 3
- How to build an old pg on ruby 2.3.1 HOT 1
- Segmentation fault with ruby 2.7.8 and pg 1.5.3 HOT 10
- Segmentation fault HOT 28
- Sonoma: getaddrinfo segmentation fault HOT 2
- Segmentation fault in ruby:3.2.2-alpine3.18 docker image HOT 2
- Wrong binary conversion on x86 (32bit intel) arch causing test failures HOT 4
- Bad IAM Token against Amazon Aurora Postgres: Out of memory error HOT 2
- Attempting to execute a sql file with `\set ...` raises errors HOT 3
- conn.exec writing "INFO" statements to stderr instead of stdout HOT 2
- Segfault on ruby 3.2.2, pg 1.5.4 HOT 2
- Error ruby(39749,0x1e1f05300) malloc: double free for ptr 0x13c6bfa00 HOT 1
- Segmentation fault when connecting to RDS HOT 11
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