FirebaseDatabase Thread Performance Checker warning

[Serg-Pogrebnyak]

Description

Added next part of code into the AppDelegate

FirebaseApp.configure()        
let database = Database.database()
database.callbackQueue = DispatchQueue(label: "remote.db.queue")
let _ = database.reference()

and after this in the application I have some UI setups and segues, and looks like FirebaseDatabase pod, occure a QOS warning, I've tried to create a sample for you, but have no luck. I can catch it only from my project. I've disable all stuff related to Firebase but it's didn't help.

Reproducing the issue

No response

Firebase SDK Version

10.25

Xcode Version

15.3

Installation Method

CocoaPods

Firebase Product(s)

Database

Targeted Platforms

iOS

Relevant Log Output

Thread Performance Checker: Thread running at User-initiated quality-of-service class waiting on a thread without a QoS class specified (base priority 33). Investigate ways to avoid priority inversions
PID: 97139, TID: 10267618
Backtrace
=================================================================
3   CFNetwork                           0x00000001a2f54a08 estimatedPropertyListSize + 37652
4   CFNetwork                           0x00000001a2dbf3a8 cfnTranslateCFError + 2688
5   libdispatch.dylib                   0x0000000102a927bc _dispatch_client_callout + 20
6   libdispatch.dylib                   0x0000000102a9434c _dispatch_once_callout + 140
7   CFNetwork                           0x00000001a2dbf37c cfnTranslateCFError + 2644
8   CFNetwork                           0x00000001a2f548c8 estimatedPropertyListSize + 37332
9   libdispatch.dylib                   0x0000000102a927bc _dispatch_client_callout + 20
10  libdispatch.dylib                   0x0000000102a9434c _dispatch_once_callout + 140
11  CFNetwork                           0x00000001a2f54790 estimatedPropertyListSize + 37020
12  CFNetwork                           0x00000001a2f5481c estimatedPropertyListSize + 37160
13  libdispatch.dylib                   0x0000000102a927bc _dispatch_client_callout + 20
14  libdispatch.dylib                   0x0000000102a9434c _dispatch_once_callout + 140
15  CFNetwork                           0x00000001a2f54804 estimatedPropertyListSize + 37136
16  CFNetwork                           0x00000001a2e14498 _CFStreamErrorFromCFError + 248272
17  CoreFoundation                      0x00000001a1c25568 3A5F992A-D1CD-312E-BD2E-F7C66343A417 + 406888
18  FirebaseDatabase                    0x000000010213d07c -[FSRWebSocket _initializeStreams] + 700
19  FirebaseDatabase                    0x000000010213bb88 -[FSRWebSocket _SR_commonInit] + 324
20  FirebaseDatabase                    0x000000010213b5f8 -[FSRWebSocket initWithURLRequest:protocols:queue:googleAppID:andUserAgent:] + 820
21  FirebaseDatabase                    0x000000010213b7e0 -[FSRWebSocket initWithURLRequest:queue:googleAppID:andUserAgent:] + 168
22  FirebaseDatabase                    0x0000000102166310 -[FWebSocketConnection initWith:andQueue:googleAppID:lastSessionID:appCheckToken:] + 616
23  FirebaseDatabase                    0x00000001020e4eac -[FConnection initWith:andDispatchQueue:googleAppID:lastSessionID:appCheckToken:] + 304
24  FirebaseDatabase                    0x000000010211abd0 -[FPersistentConnection openNetworkConnectionWithContext:] + 440
25  FirebaseDatabase                    0x000000010211a8cc __45-[FPersistentConnection tryScheduleReconnect]_block_invoke_2 + 348
26  FirebaseDatabase                    0x00000001020f5944 __80-[FIRDatabaseConnectionContextProvider fetchContextForcingRefresh:withCallback:]_block_invoke.51 + 120
27  libdispatch.dylib                   0x0000000102a90b98 _dispatch_call_block_and_release + 32
28  libdispatch.dylib                   0x0000000102a927bc _dispatch_client_callout + 20
29  libdispatch.dylib                   0x0000000102a9a66c _dispatch_lane_serial_drain + 832
30  libdispatch.dylib                   0x0000000102a9b408 _dispatch_lane_invoke + 408
31  libdispatch.dylib                   0x0000000102aa8404 _dispatch_root_queue_drain_deferred_wlh + 328
32  libdispatch.dylib                   0x0000000102aa7a38 _dispatch_workloop_worker_thread + 444
33  libsystem_pthread.dylib             0x00000001fdba4f20 _pthread_wqthread + 288
34  libsystem_pthread.dylib             0x00000001fdba4fc0 start_wqthread + 8

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PODS:
  - abseil/algorithm (1.20240116.2):
    - abseil/algorithm/algorithm (= 1.20240116.2)
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    - abseil/base/core_headers
    - abseil/xcprivacy
  - abseil/numeric/int128 (1.20240116.2):
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/numeric/bits
    - abseil/xcprivacy
  - abseil/numeric/representation (1.20240116.2):
    - abseil/base/config
    - abseil/xcprivacy
  - abseil/profiling/exponential_biased (1.20240116.2):
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/xcprivacy
  - abseil/profiling/sample_recorder (1.20240116.2):
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/synchronization/synchronization
    - abseil/time/time
    - abseil/xcprivacy
  - abseil/random/bit_gen_ref (1.20240116.2):
    - abseil/base/core_headers
    - abseil/base/fast_type_id
    - abseil/meta/type_traits
    - abseil/random/internal/distribution_caller
    - abseil/random/internal/fast_uniform_bits
    - abseil/random/random
    - abseil/xcprivacy
  - abseil/random/distributions (1.20240116.2):
    - abseil/base/base_internal
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/meta/type_traits
    - abseil/numeric/bits
    - abseil/random/internal/distribution_caller
    - abseil/random/internal/fast_uniform_bits
    - abseil/random/internal/fastmath
    - abseil/random/internal/generate_real
    - abseil/random/internal/iostream_state_saver
    - abseil/random/internal/traits
    - abseil/random/internal/uniform_helper
    - abseil/random/internal/wide_multiply
    - abseil/strings/strings
    - abseil/xcprivacy
  - abseil/random/internal/distribution_caller (1.20240116.2):
    - abseil/base/config
    - abseil/base/fast_type_id
    - abseil/utility/utility
    - abseil/xcprivacy
  - abseil/random/internal/fast_uniform_bits (1.20240116.2):
    - abseil/base/config
    - abseil/meta/type_traits
    - abseil/random/internal/traits
    - abseil/xcprivacy
  - abseil/random/internal/fastmath (1.20240116.2):
    - abseil/numeric/bits
    - abseil/xcprivacy
  - abseil/random/internal/generate_real (1.20240116.2):
    - abseil/meta/type_traits
    - abseil/numeric/bits
    - abseil/random/internal/fastmath
    - abseil/random/internal/traits
    - abseil/xcprivacy
  - abseil/random/internal/iostream_state_saver (1.20240116.2):
    - abseil/meta/type_traits
    - abseil/numeric/int128
    - abseil/xcprivacy
  - abseil/random/internal/nonsecure_base (1.20240116.2):
    - abseil/base/core_headers
    - abseil/container/inlined_vector
    - abseil/meta/type_traits
    - abseil/random/internal/pool_urbg
    - abseil/random/internal/salted_seed_seq
    - abseil/random/internal/seed_material
    - abseil/types/span
    - abseil/xcprivacy
  - abseil/random/internal/pcg_engine (1.20240116.2):
    - abseil/base/config
    - abseil/meta/type_traits
    - abseil/numeric/bits
    - abseil/numeric/int128
    - abseil/random/internal/fastmath
    - abseil/random/internal/iostream_state_saver
    - abseil/xcprivacy
  - abseil/random/internal/platform (1.20240116.2):
    - abseil/base/config
    - abseil/xcprivacy
  - abseil/random/internal/pool_urbg (1.20240116.2):
    - abseil/base/base
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/endian
    - abseil/base/raw_logging_internal
    - abseil/random/internal/randen
    - abseil/random/internal/seed_material
    - abseil/random/internal/traits
    - abseil/random/seed_gen_exception
    - abseil/types/span
    - abseil/xcprivacy
  - abseil/random/internal/randen (1.20240116.2):
    - abseil/base/raw_logging_internal
    - abseil/random/internal/platform
    - abseil/random/internal/randen_hwaes
    - abseil/random/internal/randen_slow
    - abseil/xcprivacy
  - abseil/random/internal/randen_engine (1.20240116.2):
    - abseil/base/endian
    - abseil/meta/type_traits
    - abseil/random/internal/iostream_state_saver
    - abseil/random/internal/randen
    - abseil/xcprivacy
  - abseil/random/internal/randen_hwaes (1.20240116.2):
    - abseil/base/config
    - abseil/random/internal/platform
    - abseil/random/internal/randen_hwaes_impl
    - abseil/xcprivacy
  - abseil/random/internal/randen_hwaes_impl (1.20240116.2):
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/numeric/int128
    - abseil/random/internal/platform
    - abseil/xcprivacy
  - abseil/random/internal/randen_slow (1.20240116.2):
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/endian
    - abseil/numeric/int128
    - abseil/random/internal/platform
    - abseil/xcprivacy
  - abseil/random/internal/salted_seed_seq (1.20240116.2):
    - abseil/container/inlined_vector
    - abseil/meta/type_traits
    - abseil/random/internal/seed_material
    - abseil/types/optional
    - abseil/types/span
    - abseil/xcprivacy
  - abseil/random/internal/seed_material (1.20240116.2):
    - abseil/base/core_headers
    - abseil/base/dynamic_annotations
    - abseil/base/raw_logging_internal
    - abseil/random/internal/fast_uniform_bits
    - abseil/strings/strings
    - abseil/types/optional
    - abseil/types/span
    - abseil/xcprivacy
  - abseil/random/internal/traits (1.20240116.2):
    - abseil/base/config
    - abseil/numeric/bits
    - abseil/numeric/int128
    - abseil/xcprivacy
  - abseil/random/internal/uniform_helper (1.20240116.2):
    - abseil/base/config
    - abseil/meta/type_traits
    - abseil/numeric/int128
    - abseil/random/internal/traits
    - abseil/xcprivacy
  - abseil/random/internal/wide_multiply (1.20240116.2):
    - abseil/base/config
    - abseil/numeric/bits
    - abseil/numeric/int128
    - abseil/random/internal/traits
    - abseil/xcprivacy
  - abseil/random/random (1.20240116.2):
    - abseil/random/distributions
    - abseil/random/internal/nonsecure_base
    - abseil/random/internal/pcg_engine
    - abseil/random/internal/pool_urbg
    - abseil/random/internal/randen_engine
    - abseil/random/seed_sequences
    - abseil/xcprivacy
  - abseil/random/seed_gen_exception (1.20240116.2):
    - abseil/base/config
    - abseil/xcprivacy
  - abseil/random/seed_sequences (1.20240116.2):
    - abseil/base/config
    - abseil/random/internal/pool_urbg
    - abseil/random/internal/salted_seed_seq
    - abseil/random/internal/seed_material
    - abseil/random/seed_gen_exception
    - abseil/types/span
    - abseil/xcprivacy
  - abseil/status/status (1.20240116.2):
    - abseil/base/atomic_hook
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/no_destructor
    - abseil/base/nullability
    - abseil/base/raw_logging_internal
    - abseil/base/strerror
    - abseil/container/inlined_vector
    - abseil/debugging/stacktrace
    - abseil/debugging/symbolize
    - abseil/functional/function_ref
    - abseil/memory/memory
    - abseil/strings/cord
    - abseil/strings/str_format
    - abseil/strings/strings
    - abseil/types/optional
    - abseil/types/span
    - abseil/xcprivacy
  - abseil/status/statusor (1.20240116.2):
    - abseil/base/base
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/nullability
    - abseil/base/raw_logging_internal
    - abseil/meta/type_traits
    - abseil/status/status
    - abseil/strings/has_ostream_operator
    - abseil/strings/str_format
    - abseil/strings/strings
    - abseil/types/variant
    - abseil/utility/utility
    - abseil/xcprivacy
  - abseil/strings/charset (1.20240116.2):
    - abseil/base/core_headers
    - abseil/strings/string_view
    - abseil/xcprivacy
  - abseil/strings/cord (1.20240116.2):
    - abseil/base/base
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/endian
    - abseil/base/nullability
    - abseil/base/raw_logging_internal
    - abseil/container/inlined_vector
    - abseil/crc/crc32c
    - abseil/crc/crc_cord_state
    - abseil/functional/function_ref
    - abseil/meta/type_traits
    - abseil/numeric/bits
    - abseil/strings/cord_internal
    - abseil/strings/cordz_functions
    - abseil/strings/cordz_info
    - abseil/strings/cordz_statistics
    - abseil/strings/cordz_update_scope
    - abseil/strings/cordz_update_tracker
    - abseil/strings/internal
    - abseil/strings/strings
    - abseil/types/optional
    - abseil/types/span
    - abseil/xcprivacy
  - abseil/strings/cord_internal (1.20240116.2):
    - abseil/base/base_internal
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/endian
    - abseil/base/raw_logging_internal
    - abseil/base/throw_delegate
    - abseil/container/compressed_tuple
    - abseil/container/container_memory
    - abseil/container/inlined_vector
    - abseil/container/layout
    - abseil/crc/crc_cord_state
    - abseil/functional/function_ref
    - abseil/meta/type_traits
    - abseil/strings/strings
    - abseil/types/span
    - abseil/xcprivacy
  - abseil/strings/cordz_functions (1.20240116.2):
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/raw_logging_internal
    - abseil/profiling/exponential_biased
    - abseil/xcprivacy
  - abseil/strings/cordz_handle (1.20240116.2):
    - abseil/base/base
    - abseil/base/config
    - abseil/base/raw_logging_internal
    - abseil/synchronization/synchronization
    - abseil/xcprivacy
  - abseil/strings/cordz_info (1.20240116.2):
    - abseil/base/base
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/raw_logging_internal
    - abseil/container/inlined_vector
    - abseil/debugging/stacktrace
    - abseil/strings/cord_internal
    - abseil/strings/cordz_functions
    - abseil/strings/cordz_handle
    - abseil/strings/cordz_statistics
    - abseil/strings/cordz_update_tracker
    - abseil/synchronization/synchronization
    - abseil/time/time
    - abseil/types/span
    - abseil/xcprivacy
  - abseil/strings/cordz_statistics (1.20240116.2):
    - abseil/base/config
    - abseil/strings/cordz_update_tracker
    - abseil/xcprivacy
  - abseil/strings/cordz_update_scope (1.20240116.2):
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/strings/cord_internal
    - abseil/strings/cordz_info
    - abseil/strings/cordz_update_tracker
    - abseil/xcprivacy
  - abseil/strings/cordz_update_tracker (1.20240116.2):
    - abseil/base/config
    - abseil/xcprivacy
  - abseil/strings/has_ostream_operator (1.20240116.2):
    - abseil/base/config
    - abseil/xcprivacy
  - abseil/strings/internal (1.20240116.2):
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/endian
    - abseil/base/raw_logging_internal
    - abseil/meta/type_traits
    - abseil/xcprivacy
  - abseil/strings/str_format (1.20240116.2):
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/nullability
    - abseil/strings/str_format_internal
    - abseil/strings/string_view
    - abseil/types/span
    - abseil/xcprivacy
  - abseil/strings/str_format_internal (1.20240116.2):
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/container/fixed_array
    - abseil/container/inlined_vector
    - abseil/functional/function_ref
    - abseil/meta/type_traits
    - abseil/numeric/bits
    - abseil/numeric/int128
    - abseil/numeric/representation
    - abseil/strings/strings
    - abseil/types/optional
    - abseil/types/span
    - abseil/utility/utility
    - abseil/xcprivacy
  - abseil/strings/string_view (1.20240116.2):
    - abseil/base/base
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/nullability
    - abseil/base/throw_delegate
    - abseil/xcprivacy
  - abseil/strings/strings (1.20240116.2):
    - abseil/base/base
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/endian
    - abseil/base/nullability
    - abseil/base/raw_logging_internal
    - abseil/base/throw_delegate
    - abseil/memory/memory
    - abseil/meta/type_traits
    - abseil/numeric/bits
    - abseil/numeric/int128
    - abseil/strings/charset
    - abseil/strings/internal
    - abseil/strings/string_view
    - abseil/xcprivacy
  - abseil/synchronization/graphcycles_internal (1.20240116.2):
    - abseil/base/base
    - abseil/base/base_internal
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/malloc_internal
    - abseil/base/raw_logging_internal
    - abseil/xcprivacy
  - abseil/synchronization/kernel_timeout_internal (1.20240116.2):
    - abseil/base/base
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/raw_logging_internal
    - abseil/time/time
    - abseil/xcprivacy
  - abseil/synchronization/synchronization (1.20240116.2):
    - abseil/base/atomic_hook
    - abseil/base/base
    - abseil/base/base_internal
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/dynamic_annotations
    - abseil/base/malloc_internal
    - abseil/base/raw_logging_internal
    - abseil/debugging/stacktrace
    - abseil/debugging/symbolize
    - abseil/synchronization/graphcycles_internal
    - abseil/synchronization/kernel_timeout_internal
    - abseil/time/time
    - abseil/xcprivacy
  - abseil/time (1.20240116.2):
    - abseil/time/internal (= 1.20240116.2)
    - abseil/time/time (= 1.20240116.2)
  - abseil/time/internal (1.20240116.2):
    - abseil/time/internal/cctz (= 1.20240116.2)
  - abseil/time/internal/cctz (1.20240116.2):
    - abseil/time/internal/cctz/civil_time (= 1.20240116.2)
    - abseil/time/internal/cctz/time_zone (= 1.20240116.2)
  - abseil/time/internal/cctz/civil_time (1.20240116.2):
    - abseil/base/config
    - abseil/xcprivacy
  - abseil/time/internal/cctz/time_zone (1.20240116.2):
    - abseil/base/config
    - abseil/time/internal/cctz/civil_time
    - abseil/xcprivacy
  - abseil/time/time (1.20240116.2):
    - abseil/base/base
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/raw_logging_internal
    - abseil/numeric/int128
    - abseil/strings/strings
    - abseil/time/internal/cctz/civil_time
    - abseil/time/internal/cctz/time_zone
    - abseil/types/optional
    - abseil/xcprivacy
  - abseil/types (1.20240116.2):
    - abseil/types/any (= 1.20240116.2)
    - abseil/types/bad_any_cast (= 1.20240116.2)
    - abseil/types/bad_any_cast_impl (= 1.20240116.2)
    - abseil/types/bad_optional_access (= 1.20240116.2)
    - abseil/types/bad_variant_access (= 1.20240116.2)
    - abseil/types/compare (= 1.20240116.2)
    - abseil/types/optional (= 1.20240116.2)
    - abseil/types/span (= 1.20240116.2)
    - abseil/types/variant (= 1.20240116.2)
  - abseil/types/any (1.20240116.2):
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/fast_type_id
    - abseil/meta/type_traits
    - abseil/types/bad_any_cast
    - abseil/utility/utility
    - abseil/xcprivacy
  - abseil/types/bad_any_cast (1.20240116.2):
    - abseil/base/config
    - abseil/types/bad_any_cast_impl
    - abseil/xcprivacy
  - abseil/types/bad_any_cast_impl (1.20240116.2):
    - abseil/base/config
    - abseil/base/raw_logging_internal
    - abseil/xcprivacy
  - abseil/types/bad_optional_access (1.20240116.2):
    - abseil/base/config
    - abseil/base/raw_logging_internal
    - abseil/xcprivacy
  - abseil/types/bad_variant_access (1.20240116.2):
    - abseil/base/config
    - abseil/base/raw_logging_internal
    - abseil/xcprivacy
  - abseil/types/compare (1.20240116.2):
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/meta/type_traits
    - abseil/xcprivacy
  - abseil/types/optional (1.20240116.2):
    - abseil/base/base_internal
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/base/nullability
    - abseil/memory/memory
    - abseil/meta/type_traits
    - abseil/types/bad_optional_access
    - abseil/utility/utility
    - abseil/xcprivacy
  - abseil/types/span (1.20240116.2):
    - abseil/algorithm/algorithm
    - abseil/base/core_headers
    - abseil/base/nullability
    - abseil/base/throw_delegate
    - abseil/meta/type_traits
    - abseil/xcprivacy
  - abseil/types/variant (1.20240116.2):
    - abseil/base/base_internal
    - abseil/base/config
    - abseil/base/core_headers
    - abseil/meta/type_traits
    - abseil/types/bad_variant_access
    - abseil/utility/utility
    - abseil/xcprivacy
  - abseil/utility/utility (1.20240116.2):
    - abseil/base/base_internal
    - abseil/base/config
    - abseil/meta/type_traits
    - abseil/xcprivacy
  - abseil/xcprivacy (1.20240116.2)
  - Alamofire (5.9.1)
  - BoringSSL-GRPC (0.0.32):
    - BoringSSL-GRPC/Implementation (= 0.0.32)
    - BoringSSL-GRPC/Interface (= 0.0.32)
  - BoringSSL-GRPC/Implementation (0.0.32):
    - BoringSSL-GRPC/Interface (= 0.0.32)
  - BoringSSL-GRPC/Interface (0.0.32)
  - Firebase (10.25.0):
    - Firebase/Core (= 10.25.0)
  - Firebase/Core (10.25.0):
    - Firebase/CoreOnly
    - FirebaseAnalytics (~> 10.25.0)
  - Firebase/CoreOnly (10.25.0):
    - FirebaseCore (= 10.25.0)
  - FirebaseAnalytics (10.25.0):
    - FirebaseAnalytics/AdIdSupport (= 10.25.0)
    - FirebaseCore (~> 10.0)
    - FirebaseInstallations (~> 10.0)
    - GoogleUtilities/AppDelegateSwizzler (~> 7.11)
    - GoogleUtilities/MethodSwizzler (~> 7.11)
    - GoogleUtilities/Network (~> 7.11)
    - "GoogleUtilities/NSData+zlib (~> 7.11)"
    - nanopb (< 2.30911.0, >= 2.30908.0)
  - FirebaseAnalytics/AdIdSupport (10.25.0):
    - FirebaseCore (~> 10.0)
    - FirebaseInstallations (~> 10.0)
    - GoogleAppMeasurement (= 10.25.0)
    - GoogleUtilities/AppDelegateSwizzler (~> 7.11)
    - GoogleUtilities/MethodSwizzler (~> 7.11)
    - GoogleUtilities/Network (~> 7.11)
    - "GoogleUtilities/NSData+zlib (~> 7.11)"
    - nanopb (< 2.30911.0, >= 2.30908.0)
  - FirebaseAppCheckInterop (10.25.0)
  - FirebaseAuth (10.25.0):
    - FirebaseAppCheckInterop (~> 10.17)
    - FirebaseCore (~> 10.0)
    - GoogleUtilities/AppDelegateSwizzler (~> 7.8)
    - GoogleUtilities/Environment (~> 7.8)
    - GTMSessionFetcher/Core (< 4.0, >= 2.1)
    - RecaptchaInterop (~> 100.0)
  - FirebaseAuthInterop (10.25.0)
  - FirebaseCore (10.25.0):
    - FirebaseCoreInternal (~> 10.0)
    - GoogleUtilities/Environment (~> 7.12)
    - GoogleUtilities/Logger (~> 7.12)
  - FirebaseCoreExtension (10.25.0):
    - FirebaseCore (~> 10.0)
  - FirebaseCoreInternal (10.25.0):
    - "GoogleUtilities/NSData+zlib (~> 7.8)"
  - FirebaseCrashlytics (10.25.0):
    - FirebaseCore (~> 10.5)
    - FirebaseInstallations (~> 10.0)
    - FirebaseRemoteConfigInterop (~> 10.23)
    - FirebaseSessions (~> 10.5)
    - GoogleDataTransport (~> 9.2)
    - GoogleUtilities/Environment (~> 7.8)
    - nanopb (< 2.30911.0, >= 2.30908.0)
    - PromisesObjC (~> 2.1)
  - FirebaseDatabase (10.25.0):
    - FirebaseAppCheckInterop (~> 10.17)
    - FirebaseCore (~> 10.0)
    - FirebaseSharedSwift (~> 10.0)
    - GoogleUtilities/UserDefaults (~> 7.13)
    - leveldb-library (~> 1.22)
  - FirebaseFirestore (10.25.0):
    - FirebaseCore (~> 10.0)
    - FirebaseCoreExtension (~> 10.0)
    - FirebaseFirestoreInternal (= 10.25.0)
    - FirebaseSharedSwift (~> 10.0)
  - FirebaseFirestoreInternal (10.25.0):
    - abseil/algorithm (~> 1.20240116.1)
    - abseil/base (~> 1.20240116.1)
    - abseil/container/flat_hash_map (~> 1.20240116.1)
    - abseil/memory (~> 1.20240116.1)
    - abseil/meta (~> 1.20240116.1)
    - abseil/strings/strings (~> 1.20240116.1)
    - abseil/time (~> 1.20240116.1)
    - abseil/types (~> 1.20240116.1)
    - FirebaseAppCheckInterop (~> 10.17)
    - FirebaseCore (~> 10.0)
    - "gRPC-C++ (~> 1.62.0)"
    - gRPC-Core (~> 1.62.0)
    - leveldb-library (~> 1.22)
    - nanopb (< 2.30911.0, >= 2.30908.0)
  - FirebaseInstallations (10.25.0):
    - FirebaseCore (~> 10.0)
    - GoogleUtilities/Environment (~> 7.8)
    - GoogleUtilities/UserDefaults (~> 7.8)
    - PromisesObjC (~> 2.1)
  - FirebaseRemoteConfigInterop (10.25.0)
  - FirebaseSessions (10.25.0):
    - FirebaseCore (~> 10.5)
    - FirebaseCoreExtension (~> 10.0)
    - FirebaseInstallations (~> 10.0)
    - GoogleDataTransport (~> 9.2)
    - GoogleUtilities/Environment (~> 7.13)
    - GoogleUtilities/UserDefaults (~> 7.13)
    - nanopb (< 2.30911.0, >= 2.30908.0)
    - PromisesSwift (~> 2.1)
  - FirebaseSharedSwift (10.25.0)
  - FirebaseStorage (10.25.0):
    - FirebaseAppCheckInterop (~> 10.0)
    - FirebaseAuthInterop (~> 10.25)
    - FirebaseCore (~> 10.0)
    - FirebaseCoreExtension (~> 10.0)
    - GoogleUtilities/Environment (~> 7.12)
    - GTMSessionFetcher/Core (< 4.0, >= 2.1)
  - GoogleAppMeasurement (10.25.0):
    - GoogleAppMeasurement/AdIdSupport (= 10.25.0)
    - GoogleUtilities/AppDelegateSwizzler (~> 7.11)
    - GoogleUtilities/MethodSwizzler (~> 7.11)
    - GoogleUtilities/Network (~> 7.11)
    - "GoogleUtilities/NSData+zlib (~> 7.11)"
    - nanopb (< 2.30911.0, >= 2.30908.0)
  - GoogleAppMeasurement/AdIdSupport (10.25.0):
    - GoogleAppMeasurement/WithoutAdIdSupport (= 10.25.0)
    - GoogleUtilities/AppDelegateSwizzler (~> 7.11)
    - GoogleUtilities/MethodSwizzler (~> 7.11)
    - GoogleUtilities/Network (~> 7.11)
    - "GoogleUtilities/NSData+zlib (~> 7.11)"
    - nanopb (< 2.30911.0, >= 2.30908.0)
  - GoogleAppMeasurement/WithoutAdIdSupport (10.25.0):
    - GoogleUtilities/AppDelegateSwizzler (~> 7.11)
    - GoogleUtilities/MethodSwizzler (~> 7.11)
    - GoogleUtilities/Network (~> 7.11)
    - "GoogleUtilities/NSData+zlib (~> 7.11)"
    - nanopb (< 2.30911.0, >= 2.30908.0)
  - GoogleDataTransport (9.4.1):
    - GoogleUtilities/Environment (~> 7.7)
    - nanopb (< 2.30911.0, >= 2.30908.0)
    - PromisesObjC (< 3.0, >= 1.2)
  - GoogleUtilities/AppDelegateSwizzler (7.13.2):
    - GoogleUtilities/Environment
    - GoogleUtilities/Logger
    - GoogleUtilities/Network
    - GoogleUtilities/Privacy
  - GoogleUtilities/Environment (7.13.2):
    - GoogleUtilities/Privacy
    - PromisesObjC (< 3.0, >= 1.2)
  - GoogleUtilities/Logger (7.13.2):
    - GoogleUtilities/Environment
    - GoogleUtilities/Privacy
  - GoogleUtilities/MethodSwizzler (7.13.2):
    - GoogleUtilities/Logger
    - GoogleUtilities/Privacy
  - GoogleUtilities/Network (7.13.2):
    - GoogleUtilities/Logger
    - "GoogleUtilities/NSData+zlib"
    - GoogleUtilities/Privacy
    - GoogleUtilities/Reachability
  - "GoogleUtilities/NSData+zlib (7.13.2)":
    - GoogleUtilities/Privacy
  - GoogleUtilities/Privacy (7.13.2)
  - GoogleUtilities/Reachability (7.13.2):
    - GoogleUtilities/Logger
    - GoogleUtilities/Privacy
  - GoogleUtilities/UserDefaults (7.13.2):
    - GoogleUtilities/Logger
    - GoogleUtilities/Privacy
  - "gRPC-C++ (1.62.5)":
    - "gRPC-C++/Implementation (= 1.62.5)"
    - "gRPC-C++/Interface (= 1.62.5)"
  - "gRPC-C++/Implementation (1.62.5)":
    - abseil/algorithm/container (~> 1.20240116.2)
    - abseil/base/base (~> 1.20240116.2)
    - abseil/base/config (~> 1.20240116.2)
    - abseil/base/core_headers (~> 1.20240116.2)
    - abseil/cleanup/cleanup (~> 1.20240116.2)
    - abseil/container/flat_hash_map (~> 1.20240116.2)
    - abseil/container/flat_hash_set (~> 1.20240116.2)
    - abseil/container/inlined_vector (~> 1.20240116.2)
    - abseil/flags/flag (~> 1.20240116.2)
    - abseil/flags/marshalling (~> 1.20240116.2)
    - abseil/functional/any_invocable (~> 1.20240116.2)
    - abseil/functional/bind_front (~> 1.20240116.2)
    - abseil/functional/function_ref (~> 1.20240116.2)
    - abseil/hash/hash (~> 1.20240116.2)
    - abseil/memory/memory (~> 1.20240116.2)
    - abseil/meta/type_traits (~> 1.20240116.2)
    - abseil/random/bit_gen_ref (~> 1.20240116.2)
    - abseil/random/distributions (~> 1.20240116.2)
    - abseil/random/random (~> 1.20240116.2)
    - abseil/status/status (~> 1.20240116.2)
    - abseil/status/statusor (~> 1.20240116.2)
    - abseil/strings/cord (~> 1.20240116.2)
    - abseil/strings/str_format (~> 1.20240116.2)
    - abseil/strings/strings (~> 1.20240116.2)
    - abseil/synchronization/synchronization (~> 1.20240116.2)
    - abseil/time/time (~> 1.20240116.2)
    - abseil/types/optional (~> 1.20240116.2)
    - abseil/types/span (~> 1.20240116.2)
    - abseil/types/variant (~> 1.20240116.2)
    - abseil/utility/utility (~> 1.20240116.2)
    - "gRPC-C++/Interface (= 1.62.5)"
    - "gRPC-C++/Privacy (= 1.62.5)"
    - gRPC-Core (= 1.62.5)
  - "gRPC-C++/Interface (1.62.5)"
  - "gRPC-C++/Privacy (1.62.5)"
  - gRPC-Core (1.62.5):
    - gRPC-Core/Implementation (= 1.62.5)
    - gRPC-Core/Interface (= 1.62.5)
  - gRPC-Core/Implementation (1.62.5):
    - abseil/algorithm/container (~> 1.20240116.2)
    - abseil/base/base (~> 1.20240116.2)
    - abseil/base/config (~> 1.20240116.2)
    - abseil/base/core_headers (~> 1.20240116.2)
    - abseil/cleanup/cleanup (~> 1.20240116.2)
    - abseil/container/flat_hash_map (~> 1.20240116.2)
    - abseil/container/flat_hash_set (~> 1.20240116.2)
    - abseil/container/inlined_vector (~> 1.20240116.2)
    - abseil/flags/flag (~> 1.20240116.2)
    - abseil/flags/marshalling (~> 1.20240116.2)
    - abseil/functional/any_invocable (~> 1.20240116.2)
    - abseil/functional/bind_front (~> 1.20240116.2)
    - abseil/functional/function_ref (~> 1.20240116.2)
    - abseil/hash/hash (~> 1.20240116.2)
    - abseil/memory/memory (~> 1.20240116.2)
    - abseil/meta/type_traits (~> 1.20240116.2)
    - abseil/random/bit_gen_ref (~> 1.20240116.2)
    - abseil/random/distributions (~> 1.20240116.2)
    - abseil/random/random (~> 1.20240116.2)
    - abseil/status/status (~> 1.20240116.2)
    - abseil/status/statusor (~> 1.20240116.2)
    - abseil/strings/cord (~> 1.20240116.2)
    - abseil/strings/str_format (~> 1.20240116.2)
    - abseil/strings/strings (~> 1.20240116.2)
    - abseil/synchronization/synchronization (~> 1.20240116.2)
    - abseil/time/time (~> 1.20240116.2)
    - abseil/types/optional (~> 1.20240116.2)
    - abseil/types/span (~> 1.20240116.2)
    - abseil/types/variant (~> 1.20240116.2)
    - abseil/utility/utility (~> 1.20240116.2)
    - BoringSSL-GRPC (= 0.0.32)
    - gRPC-Core/Interface (= 1.62.5)
    - gRPC-Core/Privacy (= 1.62.5)
  - gRPC-Core/Interface (1.62.5)
  - gRPC-Core/Privacy (1.62.5)
  - GTMSessionFetcher/Core (3.4.1)
  - Kingfisher (7.11.0)
  - leveldb-library (1.22.5)
  - MSPeekCollectionViewDelegateImplementation (3.2.0)
  - nanopb (2.30910.0):
    - nanopb/decode (= 2.30910.0)
    - nanopb/encode (= 2.30910.0)
  - nanopb/decode (2.30910.0)
  - nanopb/encode (2.30910.0)
  - PromisesObjC (2.4.0)
  - PromisesSwift (2.4.0):
    - PromisesObjC (= 2.4.0)
  - R.swift (7.3.2)
  - RecaptchaInterop (100.0.0)
  - SVProgressHUD (2.3.1):
    - SVProgressHUD/Core (= 2.3.1)
  - SVProgressHUD/Core (2.3.1)
  - SwiftyJSON (5.0.2)

DEPENDENCIES:
  - Alamofire (= 5.9.1)
  - Firebase (= 10.25.0)
  - FirebaseAnalytics (= 10.25.0)
  - FirebaseAuth (= 10.25.0)
  - FirebaseCore (= 10.25.0)
  - FirebaseCrashlytics (= 10.25.0)
  - FirebaseDatabase (= 10.25.0)
  - FirebaseFirestore (= 10.25.0)
  - FirebaseStorage (= 10.25.0)
  - Kingfisher (= 7.11.0)
  - MSPeekCollectionViewDelegateImplementation (= 3.2.0)
  - R.swift (= 7.3.2)
  - SVProgressHUD (= 2.3.1)
  - SwiftyJSON (= 5.0.2)

SPEC REPOS:
  trunk:
    - abseil
    - Alamofire
    - BoringSSL-GRPC
    - Firebase
    - FirebaseAnalytics
    - FirebaseAppCheckInterop
    - FirebaseAuth
    - FirebaseAuthInterop
    - FirebaseCore
    - FirebaseCoreExtension
    - FirebaseCoreInternal
    - FirebaseCrashlytics
    - FirebaseDatabase
    - FirebaseFirestore
    - FirebaseFirestoreInternal
    - FirebaseInstallations
    - FirebaseRemoteConfigInterop
    - FirebaseSessions
    - FirebaseSharedSwift
    - FirebaseStorage
    - GoogleAppMeasurement
    - GoogleDataTransport
    - GoogleUtilities
    - "gRPC-C++"
    - gRPC-Core
    - GTMSessionFetcher
    - Kingfisher
    - leveldb-library
    - MSPeekCollectionViewDelegateImplementation
    - nanopb
    - PromisesObjC
    - PromisesSwift
    - R.swift
    - RecaptchaInterop
    - SVProgressHUD
    - SwiftyJSON

SPEC CHECKSUMS:
  abseil: d121da9ef7e2ff4cab7666e76c5a3e0915ae08c3
  Alamofire: f36a35757af4587d8e4f4bfa223ad10be2422b8c
  BoringSSL-GRPC: 1e2348957acdbcad360b80a264a90799984b2ba6
  Firebase: 0312a2352584f782ea56f66d91606891d4607f06
  FirebaseAnalytics: ec00fe8b93b41dc6fe4a28784b8e51da0647a248
  FirebaseAppCheckInterop: 5da5ce93e8797a215e3f677fb0654b74e736c8b8
  FirebaseAuth: c0f93dcc570c9da2bffb576969d793e95c344fbb
  FirebaseAuthInterop: 2753ef68cb3cd5aefebe0f58082671cede78350f
  FirebaseCore: 7ec4d0484817f12c3373955bc87762d96842d483
  FirebaseCoreExtension: 8a47811d0b155501559ef05d089518152a0a1677
  FirebaseCoreInternal: 910a81992c33715fec9263ca7381d59ab3a750b7
  FirebaseCrashlytics: 4b96efb0ce73b38b2a85e8b8bd1bd8f63f09d015
  FirebaseDatabase: faa489a42f5f868d23a55dd442d6e2099348458e
  FirebaseFirestore: 977ccc27a3caa5d68279f209c3b0450f85b9dc5f
  FirebaseFirestoreInternal: 04b8afa77b4e5b84e86ab5ad985193e9573239fa
  FirebaseInstallations: 91950fe859846fff0fbd296180909dd273103b09
  FirebaseRemoteConfigInterop: b25018791b204c0d78a90e394d6c62d9b1f22da8
  FirebaseSessions: c0939656253a1fa0e94ecc266ccf770cc8b33732
  FirebaseSharedSwift: 0274086954b1b2d5fd7e829eccc587044d72a4ba
  FirebaseStorage: 44f4e25073f6fa0d4d8c09f5bec299ee9e4eb985
  GoogleAppMeasurement: 9abf64b682732fed36da827aa2a68f0221fd2356
  GoogleDataTransport: 6c09b596d841063d76d4288cc2d2f42cc36e1e2a
  GoogleUtilities: c56430aef51a1aa57b25da78c3f8397e522c67b7
  "gRPC-C++": e725ef63c4475d7cdb7e2cf16eb0fde84bd9ee51
  gRPC-Core: eee4be35df218649fe66d721a05a7f27a28f069b
  GTMSessionFetcher: 8000756fc1c19d2e5697b90311f7832d2e33f6cd
  Kingfisher: b9c985d864d43515f404f1ef4a8ce7d802ace3ac
  leveldb-library: e8eadf9008a61f9e1dde3978c086d2b6d9b9dc28
  MSPeekCollectionViewDelegateImplementation: be35a217bd302976a9e4476151be992c1f150127
  nanopb: 438bc412db1928dac798aa6fd75726007be04262
  PromisesObjC: f5707f49cb48b9636751c5b2e7d227e43fba9f47
  PromisesSwift: 9d77319bbe72ebf6d872900551f7eeba9bce2851
  R.swift: 0af0d882f49f03711415cb4e5215daa977d8a480
  RecaptchaInterop: 7d1a4a01a6b2cb1610a47ef3f85f0c411434cb21
  SVProgressHUD: 4837c74bdfe2e51e8821c397825996a8d7de6e22
  SwiftyJSON: f5b1bf1cd8dd53cd25887ac0eabcfd92301c6a5a

PODFILE CHECKSUM: 85d39dfeeead0918a95574b209e35c6f21b2e8d4

COCOAPODS: 1.13.0

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[Serg-Pogrebnyak]

I've built a minimal reproducing build, you can find it in my GitHub.
MacOS 14.4.1
XCode 15.3
iOS 17.4.1 (iPhone 12 mini, iPhone 12 Pro)

The first few launches should be okay, but after 3-4, you should catch this warning.

[paulb777]

Thanks for the report and repro @Serg-Pogrebnyak. Before we try the repro, would you check #10130 and https://stackoverflow.com/q/72533064/556617 to see if anything in those conversations helps your example.

[Serg-Pogrebnyak]

Thanks for your reply! 
Checked and nothing helps. I've put the firebase initialization in the DispatchQueue.global.async code block, I do not have DispatchGroup in my code base at all, and checked qualityOfService it installed as NSQualityOfServiceUserInitiated. Looks like it's something new

[paulb777]

Thanks. Does is repro on the simulator or only on devices?

[Serg-Pogrebnyak]

I've developed on the simulator and never saw this issue (MacBook Pro M1 Pro, 16/512), but on the real device, I received this warning. Will be fine if you check on the real device with the same iOS version I guess.

[paulb777]

Successfully reproduced on the first run on an iPhone 13

[morganchen12]

The thread that's being blamed for this is possibly the FIRDatabaseQuery worker queue. But there's no waiting happening in the RTDB code itself, and the stack trace seems to point toward something deep in CFNetwork for the actual thread blocking that's causing the priority inversion. Searching for the blamed symbol, estimatedPropertyListSize, suggests this might be an Apple bug: https://forums.developer.apple.com/forums/thread/747859

[paulb777]

@Serg-Pogrebnyak #12894 fixes the repro case and passes our tests. Would you confirm it works for your app?

[Serg-Pogrebnyak]

@paulb777 yes, now all fine! Thank you so much!
I've checked on the test and real projects and both look fine now🎉
Thanks again!🙏🏻