Issue #19527 has been updated by hjimenez89rb (Hugo Alberto Jiménez Santos). Hi everyone. As I mentioned the first thing I did was check the issue with IBM, if you check the stack message, our application (PEC) is started, then it establish the connection to the database using IBM_GEM and this error is triggered by ruby after the ibm gem connects to the database. [INFO] Process pid 1002200 [INFO] Initializing PEC Engine ... [INFO] Establishing connection to control database ... [INFO] Engine started /ruby-3.2.1/lib/ruby/3.2.0/rubygems/specification.rb:1048: [BUG] object allocation during garbage collection phase ruby 3.2.1. Our application is something like a process dispatcher for a few moments it runs very well but after that suddenly ruby crashes. about your guess that someone else is running Ruby code without holding the global VM lock, is not possible because in our Centos 8 server is the only application running and we have enough physical resources to run. ---------------------------------------- Bug #19527: Object allocation during garbage collection phase https://bugs.ruby-lang.org/issues/19527#change-102384 * Author: hjimenez89rb (Hugo Alberto Jiménez 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 connection, 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/connection_adapters/ibm_db_adapter.rb:760: [BUG] object allocation during garbage 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 instance allocation; backtrace: /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 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) -- https://bugs.ruby-lang.org/