[ruby-core:112869] [Ruby master Bug#19527] Object allocation during garbage collection phase

Issue #19527 has been updated by alanwu (Alan Wu).



Status changed from Open to Third Party's Issue



Unfortunately, the traces are not very helpful.

But I agree, it's likely an issue with the [IBM gem](https://github.com/ibm=
db/ruby-ibmdb)

and not a Ruby issue.



Here is a guess as to what's happening: the traces indicate that it's crash=
ing soon after a new Ruby thread starts up,

and for "Object allocation during garbage collection phase" to happen at th=
at timing,

maybe someone is running Ruby code without holding the global VM lock. Any =
code paths in

the gem that terminates in `rb_thread_call_without_gvl()`, such as ones inv=
olving

`_ruby_ibm_db_check_sql_errors()`, can have this class of bugs.



You can try asking IBM to check this.



----------------------------------------

Bug #19527: Object allocation during garbage collection phase

https://bugs.ruby-lang.org/issues/19527#change-102383



* Author: hjimenez89rb (Hugo Alberto Jim=E9nez Santos)

* Status: Third Party's Issue

* Priority: Normal

* ruby -v: 3.2.1

* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN

----------------------------------------

We are currently developing a Ruby based web application which connects to =
a DB2 Database and we have been using ibm_db-5.4.0 to establish a connectio=
n, suddenly we got a error related to RUBY garbage collector PHASE.



We have checked the issue with IBM_team to make sure that It was not a IBM_=
GEM problem but as a result of their tests, IBM_GEM is working in different=
 cases but for us we face up with those errors even with those versions (2.=
7.6, 3.1.2, 3.2.1):



*0x0/usr/local/rvm/gems/ruby-3.1.2/gems/ibm_db-5.4.0/lib/active_record/conn=
ection_adapters/ibm_db_adapter.rb:760: [BUG] object allocation during garba=
ge collection phase

ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [x86_64-linux]



*Exception occurred on Step thread ID #SID:34117;RSEQ:911723; wrong instanc=
e allocation; backtrace: /usr/local/rvm/gems/ruby-3.1.2/gems/ibm_db-5.4.0/l=
ib/active_record/connection_adapters/ibm_db_adapter.rb:760:in server_info' =
(RuntimeError) /usr/local/rvm/gems/ruby-3.1.2/gems/ibm_db-5.4.0/lib/active_=
record/connection_adapters/ibm_db_adapter.rb:760:in initialize'.



(all trace is attached in this ticket)



OS

name: "CentOS"

version: "8"

architecture: "x86_64"



rvm:

version: "1.29.12 (latest)"





---Files--------------------------------

LOGS3.txt (12.5 KB)

LOGS4.txt (127 KB)

LOGS2.txt (9.62 KB)

LOGS1.txt (123 KB)





--=20

https://bugs.ruby-lang.org/

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