Realm-cocoa: mutex lock failed: Invalid argument while releasing Realm

[KimiChiu]

Goals

Release realm in autoreleasepool.

Expected Results

Released realm.

Actual Results

Fatal Exception: std::__1::system_error
mutex lock failed: Invalid argument

Crashed: com.google.firebase.crashlytics.ios.exception
0  pitt                           0x102fff184 FIRCLSProcessRecordAllThreads + 392 (FIRCLSProcess.c:392)
1  pitt                           0x102fff568 FIRCLSProcessRecordAllThreads + 423 (FIRCLSProcess.c:423)
2  pitt                           0x102ff5de4 FIRCLSHandler + 34 (FIRCLSHandler.m:34)
3  pitt                           0x102ff1ae4 __FIRCLSExceptionRecord_block_invoke + 218 (FIRCLSException.mm:218)
4  libdispatch.dylib              0x1b958b524 _dispatch_client_callout + 16
5  libdispatch.dylib              0x1b953e0b0 _dispatch_lane_barrier_sync_invoke_and_complete + 56
6  pitt                           0x102ff127c FIRCLSExceptionRecord + 225 (FIRCLSException.mm:225)
7  pitt                           0x102ff0f1c FIRCLSTerminateHandler() + 285 (FIRCLSException.mm:285)
8  libc++abi.dylib                0x1b968e14c std::__terminate(void (*)()) + 16
9  libc++abi.dylib                0x1b968e0e4 std::terminate() + 44
10 Realm                          0x104a2b36c std::__1::shared_ptr<realm::_impl::CollectionNotifier> std::__1::atomic_load<realm::_impl::CollectionNotifier>(std::__1::shared_ptr<realm::_impl::CollectionNotifier> const*) + 5427 (memory:5427)
11 Realm                          0x104c84ddc realm::Group::~Group() + 122
12 Realm                          0x104c8f25c realm::Transaction::close() + 60
13 Realm                          0x104c91d34 TransactionDeleter(realm::Transaction*) + 20
14 Realm                          0x104c969a8 std::__1::__shared_ptr_pointer<realm::Transaction*, void (*)(realm::Transaction*), std::__1::allocator<realm::Transaction> >::__on_zero_shared() + 13896
15 Realm                          0x104a2b484 std::__1::shared_ptr<realm::_impl::CollectionNotifier>::~shared_ptr() + 3586 (memory:3586)
16 Realm                          0x104b3a514 realm::Realm::~Realm() + 81 (shared_realm.cpp:81)
17 Realm                          0x104a2b484 std::__1::shared_ptr<realm::_impl::CollectionNotifier>::~shared_ptr() + 3586 (memory:3586)
18 libobjc.A.dylib                0x1b95e6c90 object_cxxDestructFromClass(objc_object*, objc_class*) + 112
19 libobjc.A.dylib                0x1b95facc4 objc_destructInstance + 88
20 libobjc.A.dylib                0x1b960173c _objc_rootDealloc + 52
21 Realm                          0x104b0b890 -[RLMRealm dealloc] + 814 (RLMRealm.mm:814)
22 libobjc.A.dylib                0x1b960404c AutoreleasePoolPage::releaseUntil(objc_object**) + 180
23 libobjc.A.dylib                0x1b9603f44 objc_autoreleasePoolPop + 224
24 libswiftObjectiveC.dylib       0x1efff2bd8 autoreleasepool<A>(invoking:) + 68
25 pitt                           0x102f1a8c4 partial apply for closure #1 in PageCacheService.delete(in:) + 584 (PageCacheService.swift:584)
26 pitt                           0x102f353f4 thunk for @escaping @callee_guaranteed () -> () + 4376204276 (<compiler-generated>:4376204276)
27 libdispatch.dylib              0x1b958a9a8 _dispatch_call_block_and_release + 24
28 libdispatch.dylib              0x1b958b524 _dispatch_client_callout + 16
29 libdispatch.dylib              0x1b95378a4 _dispatch_lane_serial_drain$VARIANT$mp + 608
30 libdispatch.dylib              0x1b9538294 _dispatch_lane_invoke$VARIANT$mp + 416
31 libdispatch.dylib              0x1b954178c _dispatch_workloop_worker_thread + 588
32 libsystem_pthread.dylib        0x1b95dcb74 _pthread_wqthread + 272
33 libsystem_pthread.dylib        0x1b95df740 start_wqthread + 8

Steps for others to Reproduce

Use autoreleasepool in DispatchQueue.

Code Sample

    public func delete(in controllerIds: [String]) {
        guard !controllerIds.isEmpty else { return }
        transactionQueue.async {
            autoreleasepool{ [weak self] in
                let logHelper = LogHelper(subsystem: "PageCacheService", category: "DeleteByControllerId")

                do {
                    logHelper.d("Deleting \(controllerIds)")

                    let realm = try RealmCacheHelper.shared.realm()

                    let matrix = self?.list(realm, in: controllerIds)
                    let state = self?.find(realm, in: controllerIds)

                    let emptyMatrix = matrix?.isEmpty ?? true
                    let emptyState = state?.isEmpty ?? true

                    guard !emptyMatrix || !emptyState else {
                        logHelper.d("Cache not found \(controllerIds)")
                        return
                    }

                    try realm.write {
                        if let s = state {
                            realm.delete(s)
                        }
                        if let m = matrix {
                            realm.delete(m)
                        }
                    }

                    logHelper.d("Deleted \(controllerIds)")
                }
                catch {
                    logHelper.e("Failed to delete page cache, error = %@", error: error)
                    Crashlytics.crashlytics().record(error: error)
                }
            }
        }
    }

Version of Realm and Tooling

Realm framework version: 5.3.2

Realm Object Server version: N/A

Xcode version: 11.6

iOS/OSX version: 10, 12, 13, 14

Dependency manager + version: CocoaPods 1.8.3

[seki-ne]

got same error in v5.3.4

[KimiChiu]

Any update on this issue?
It crashed my app 1200 times a week.
Should we remove autoreleasepool?

[igrechuhin]

Same on v5.4.4.
Is there any workaround?

[pavel-ship-it]

Hi @KimiChiu , unfortunately I cannot reproduce the issue.
Probably a problem could be hidden in one of the calls here. I'd appreciate if you could share the code.

let realm = try RealmCacheHelper.shared.realm()
let matrix = self?.list(realm, in: controllerIds)
let state = self?.find(realm, in: controllerIds)

Also to strongify weak self could be a good idea as ('partial apply for closure' in the stack trace saying the weak self could be released)

[KimiChiu]

I thought the problem was from here.

21 Realm                          0x104b0b890 -[RLMRealm dealloc] + 814 (RLMRealm.mm:814)

Because there's a 12 Realm 0x104c8f25c realm::Transaction::close() + 60 which seems like it's closing the transaction.

And the whole stack ends here.

10 Realm                          0x104a2b36c std::__1::shared_ptr<realm::_impl::CollectionNotifier> std::__1::atomic_load<realm::_impl::CollectionNotifier>(std::__1::shared_ptr<realm::_impl::CollectionNotifier> const*) + 5427 (memory:5427)

Maybe the problem is inside realm deallocation?

This is a convenient method to get another realm instance from a different configuration.

RealmCacheHelper.shared.realm()

func realm() throws -> Realm {
    return try Realm(configuration: config)
}



md5-271572887ddf5b7192c3a4cba45ebf27



public func list(_ realm: Realm, in controllerIds: [String])  -> Results<MatrixCache> {
    return realm.objects(MATRIX_CLASS).filter("\(MatrixCache.Column.ControllerId.rawValue) IN %@", controllerIds).sorted(byKeyPath: MatrixCache.Column.Page.rawValue, ascending: true)
}

public func find(_ realm: Realm, in controllerIds: [String])  -> Results<StateCache> {
    return realm.objects(STATE_CLASS).filter("\(StateCache.Column.ControllerId.rawValue) IN %@", controllerIds)
}

I can't reproduce it either.

[pavel-ship-it]

Hi @KimiChiu
We've released a major update for Realm. I would appreciate if you could try a latest version 10.1.2

[KimiChiu]

Good news! I'll let you know if the problem still exists.

[pavel-ship-it]

I'll close this issue due to inactivity. If the you still see the same issue please comment and we can re-open it.

[rogerluan]

@pavel-ship-it I just opened a new issue similar to this one 😬

[KimiChiu]

@rogerluan Is there a link to your issue?
I released a new version to TestFlight with the latest realm two weeks ago and it's working well.
I'll submit for App Store review today to see if the problem was resolved.

[rogerluan]

It's just above my comment: https://github.com/realm/realm-cocoa/issues/6966

But it was an issue on my end, happening only during unit tests.

[KimiChiu]

The problem is still there.
I just opened a new issue #6993.
It's now happening when I try to insert new data into table.
And there's another error report which is similar to this one.