Release 21.0.9b895.149 JCEF logging

[KlemenDEV]

Release 21.0.9b895.149 logs a lot of debug info when JCEF is initialized, which previous release Release 21.0.9b1163.86 does not do

[ujpv]

Hi @KlemenDEV ,
Could you please give a bit more context? Does this happen in JetBrains IDEs? Could you share an example of the log messages?

[KlemenDEV]

It happens in custom software that uses your SDK to load JCEF. Same code 21.0.9b1163.86 does not log this, but 21.0.9b895.149 logs a lot of debug info:

2025-12-09-09:40:41 [Application-Loader/INFO] [STDOUT] JCEF(
2025-12-09-09:40:41 [Application-Loader/INFO] [STDOUT] 40:41:641
2025-12-09-09:40:41 [Application-Loader/INFO] [STDOUT] ): initialized
2025-12-09-09:40:41 [Application-Loader/INFO] [STDOUT] stderr
2025-12-09-09:40:41 [Application-Loader/INFO] [STDOUT] logger, severity=
2025-12-09-09:40:41 [Application-Loader/INFO] [STDOUT] LOGSEVERITY_DEFAULT
2025-12-09-09:40:41 [Application-Loader/ERROR] [STDERR] JCEF_
2025-12-09-09:40:41 [Application-Loader/ERROR] [STDERR] I
2025-12-09-09:40:41 [Application-Loader/ERROR] [STDERR] (
2025-12-09-09:40:41 [Application-Loader/ERROR] [STDERR] 40:41:642
2025-12-09-09:40:41 [Application-Loader/ERROR] [STDERR] ):
2025-12-09-09:40:41 [Application-Loader/ERROR] [STDERR] CefApp: set state NEW
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] JCEF_
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] I
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] (
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] 40:41:659
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] ):
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] CefApp: set state INITIALIZING
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] JCEF_
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] V
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] (
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] 40:41:660
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] ):
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] Initialize CefApp on Thread[#60,CefInitialize-thread,6,main]
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] JCEF_
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] V
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] (
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] 40:41:701
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] ):
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] CefApp: native initialization is finished.
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] JCEF_
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] I
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] (
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] 40:41:702
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] ):
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] CefApp: set state INITIALIZED
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] JCEF_
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] I
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] (
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] 40:41:704
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] ):
2025-12-09-09:40:41 [CefInitialize-thread/ERROR] [STDERR] version: JCEF Version = 122.1.9.1028.a20320a3c603896417b377a16ad8769e8314021b
CEF Version = 122.1.9
Chromium Version = 122.0.6261.94 | settings: browser_subprocess_path=XXXRepos/MCreator20254/jdk/lib/jcef_helper, windowless_rendering_enabled=false, command_line_args_disabled=false, cache_path=XXX/.mcreator/cef, persist_session_cookies=false, user_agent=null, user_agent_product=null, locale=null, log_file=null, log_severity=LOGSEVERITY_DEFAULT, javascript_flags=null, resources_dir_path=XXX/Repos/MCreator20254/jdk/lib, locales_dir_path=XXX/Repos/MCreator20254/jdk/lib/locales, pack_loading_disabled=false, remote_debugging_port=0, uncaught_exception_stack_size=0, background_color=org.cef.CefSettings$ColorType@368ee6df, cookieable_schemes_list=null, cookieable_schemes_exclude_defaults=false, no_sandbox=true
[1209/094041.749113:WARNING:connection.cc(56)] X error received. Request: CreateWindowRequest, Error: WindowError{.sequence = 231, .bad_value = 12582913, .minor_opcode = 0, .major_opcode = 1}
[1209/094041.749486:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 245, .bad_value = 10485764, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.749607:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 246, .bad_value = 10485764, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.749621:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 247, .bad_value = 10485764, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.749662:WARNING:connection.cc(56)] X error received. Request: CreateWindowRequest, Error: WindowError{.sequence = 250, .bad_value = 10485764, .minor_opcode = 0, .major_opcode = 1}
[1209/094041.749689:WARNING:connection.cc(56)] X error received. Request: Input::XISelectEventsRequest, Error: WindowError{.sequence = 252, .bad_value = 10485765, .minor_opcode = 46, .major_opcode = 131}
[1209/094041.749706:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 253, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.749718:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 254, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.749851:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 255, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.749872:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 256, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.750532:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 257, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.750566:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 258, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.750573:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 259, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.750584:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 260, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.750609:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 261, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.750632:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 262, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.750654:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 263, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.750672:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 265, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.750705:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 270, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.750714:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 271, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.750720:WARNING:connection.cc(56)] X error received. Request: MapWindowRequest, Error: WindowError{.sequence = 272, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 8}
[1209/094041.750766:WARNING:connection.cc(56)] X error received. Request: ConfigureWindowRequest, Error: WindowError{.sequence = 275, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 12}
[1209/094041.750785:WARNING:connection.cc(56)] X error received. Request: ChangePropertyRequest, Error: WindowError{.sequence = 278, .bad_value = 10485764, .minor_opcode = 0, .major_opcode = 18}
[1209/094041.750792:WARNING:connection.cc(56)] X error received. Request: MapWindowRequest, Error: WindowError{.sequence = 279, .bad_value = 10485764, .minor_opcode = 0, .major_opcode = 8}
[1209/094041.781731:WARNING:connection.cc(56)] X error received. Request: SendEventRequest, Error: WindowError{.sequence = 287, .bad_value = 10485764, .minor_opcode = 0, .major_opcode = 25}
[1209/094041.811206:WARNING:sandbox_linux.cc(418)] InitializeSandbox() called with multiple threads in process gpu-process.
[1209/094041.815132:ERROR:gl_surface_egl.cc(430)] eglCreateWindowSurface failed with error EGL_BAD_NATIVE_WINDOW
[1209/094041.817101:ERROR:command_buffer_proxy_impl.cc(131)] ContextResult::kTransientFailure: Failed to send GpuControl.CreateCommandBuffer.
[1209/094041.820612:ERROR:x11_software_bitmap_presenter.cc(144)] XGetWindowAttributes failed for window 10485765
[1209/094041.821285:WARNING:connection.cc(56)] X error received. Request: CreateGCRequest, Error: DrawableError{.sequence = 188, .bad_value = 10485765, .minor_opcode = 0, .major_opcode = 55}

Without any changes done to the code, this logging appears and disappears depending on the SDK version used