Realm-cocoa: Realm files uploaded to AWS S3 sometimes crash macOS browser, or require encryption key when none was usd

Created on 8 Mar 2017  路  13Comments  路  Source: realm/realm-cocoa

Goals

In some user cases, I upload a copy of their realm to AWS S3. I make a copy with writeCopy(toFile: and then upload using the iOS framework that AWS supplies. I want to be able to download these realms to macOS and browse them with the realm browser available in the App Store.

Expected Results

I expect to be able to open these realms on macOS with the realm browser.

Actual Results

Some (about a third) of the uploaded realm files crash the browser or erroneously ask for an encryption key. They data is inaccessible.

Steps to Reproduce

Copy a realm on iOS, upload to S3, download and open with realm browser.

Code Sample

        let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
        let copyPath = URL(fileURLWithPath: "realmCopy.realm", relativeTo: URL(fileURLWithPath: documentsPath))

        self.deleteIfExists(copyPath)

        do {
            try LLDatabaseManager.shared.realm?.writeCopy(toFile: copyPath )
        } catch let error {
            DDLogError("Error making copy of realm database: \(error)")
            return
        }

        // Upload database copy
        uploadRequest.bucket = "liftrealm"
        uploadRequest.key = "\(profile.email)-\(Date()).realm"
        uploadRequest.body = copyPath

etc etc

Version of Realm and Tooling

Realm version: 2.4.2

Xcode version: 8.2

iOS/OSX version: iPhone 6s, iOS 10.0.2

T-Help

Most helpful comment

I can't be sure yet, I've made this change to work around a known corruption issue in the S3 SDK: https://github.com/aws/aws-sdk-ios/issues/415#issuecomment-285030692

I've also added checksums to the filenames so I can see when the corruption occurs. I'll report back after my qa team has had a chance to see if this is still happening.

All 13 comments

Can you please share a crash that's representative of the browser crashes you are seeing?

The two symptoms you note (browser crash, prompt for encryption key) sound like symptoms of attempting to open a Realm that has been corrupted. Have you attempted to verify that the Realm file that was stored to S3 matches the copy of the file that the device wrote out, and that the Realm file you've downloaded matches what is stored in S3?

Below is the crash report. I'll check the checksums, though I've never known S3 to corrupt such a large percentage of uploads/downloads so consistently.

Thanks!


Crash log

Process:               Realm Browser [53669]
Path:                  /Applications/Realm Browser.app/Contents/MacOS/Realm Browser
Identifier:            io.realm.realmbrowser
Version:               2.1.6 (90)
App Item ID:           1007457278
App External ID:       821183705
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           Realm Browser [53669]
User ID:               501

Date/Time:             2017-03-07 16:10:22.496 -0800
OS Version:            Mac OS X 10.12.1 (16B2657)
Report Version:        12
Anonymous UUID:        6335D8CC-82D5-1C9A-A5EF-6328C97A437B

Sleep/Wake UUID:       145FCA27-E1A8-4E4A-B398-C017C9AD659E

Time Awake Since Boot: 60000 seconds
Time Since Wake:       20000 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Application Specific Information:
abort() called

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib          0x00007fff999ccdda __pthread_kill + 10
1   libsystem_pthread.dylib         0x00007fff99ab8787 pthread_kill + 90
2   libsystem_c.dylib               0x00007fff99932420 abort + 129
3   org.cocoapods.Realm             0x000000010a974339 please_report_this_error_to_help_at_realm_dot_io + 9
4   org.cocoapods.Realm             0x000000010a974850 realm::util::terminate_internal(std::__1::basic_stringstream<char, std::__1::char_traits<char>, std::__1::allocator<char> >&) + 256
5   org.cocoapods.Realm             0x000000010a974a75 realm::util::terminate(char const*, char const*, long, std::initializer_list<realm::util::Printable>&&) + 517
6   org.cocoapods.Realm             0x000000010a979b0a void realm::util::terminate<unsigned char, int>(char const*, char const*, long, unsigned char, int) + 58
7   org.cocoapods.Realm             0x000000010aa56ea5 realm::Group::attach(unsigned long, bool) + 581
8   org.cocoapods.Realm             0x000000010aa65814 realm::SharedGroup::do_begin_read(realm::VersionID, bool) + 68
9   org.cocoapods.Realm             0x000000010aa64b0c realm::SharedGroup::begin_read(realm::VersionID) + 28
10  org.cocoapods.Realm             0x000000010a8d8609 realm::Realm::read_group() + 47
11  org.cocoapods.Realm             0x000000010a8d7d77 realm::Realm::Realm(realm::Realm::Config, std::__1::shared_ptr<realm::_impl::RealmCoordinator>) + 341
12  org.cocoapods.Realm             0x000000010a820949 realm::Realm::make_shared_realm(realm::Realm::Config, std::__1::shared_ptr<realm::_impl::RealmCoordinator>)::make_shared_enabler::make_shared_enabler(realm::Realm::Config, std::__1::shared_ptr<realm::_impl::RealmCoordinator>) + 97
13  org.cocoapods.Realm             0x000000010a8206dc std::__1::shared_ptr<realm::Realm::make_shared_realm(realm::Realm::Config, std::__1::shared_ptr<realm::_impl::RealmCoordinator>)::make_shared_enabler> std::__1::shared_ptr<realm::Realm::make_shared_realm(realm::Realm::Config, std::__1::shared_ptr<realm::_impl::RealmCoordinator>)::make_shared_enabler>::make_shared<realm::Realm::Config, std::__1::shared_ptr<realm::_impl::RealmCoordinator> >(realm::Realm::Config&&, std::__1::shared_ptr<realm::_impl::RealmCoordinator>&&) + 154
14  org.cocoapods.Realm             0x000000010a81ca30 realm::_impl::RealmCoordinator::get_realm(realm::Realm::Config) + 442
15  org.cocoapods.Realm             0x000000010a8d9767 realm::Realm::get_shared_realm(realm::Realm::Config) + 117
16  org.cocoapods.Realm             0x000000010a8baf3a +[RLMRealm realmWithConfiguration:error:] + 574
17  io.realm.realmbrowser           0x000000010a633010 0x10a608000 + 176144
18  io.realm.realmbrowser           0x000000010a60c754 0x10a608000 + 18260
19  io.realm.realmbrowser           0x000000010a60bb38 0x10a608000 + 15160
20  io.realm.realmbrowser           0x000000010a60b778 0x10a608000 + 14200
21  com.apple.AppKit                0x00007fff824c7658 -[NSDocumentController makeDocumentWithContentsOfURL:ofType:error:] + 644
22  com.apple.AppKit                0x00007fff8271861b __97-[NSDocumentController makeDocumentWithContentsOfURL:alternateContents:ofType:completionHandler:]_block_invoke + 83
23  com.apple.AppKit                0x00007fff827185bd -[NSDocumentController makeDocumentWithContentsOfURL:alternateContents:ofType:completionHandler:] + 176
24  com.apple.AppKit                0x00007fff824c668e __80-[NSDocumentController openDocumentWithContentsOfURL:display:completionHandler:]_block_invoke + 613
25  com.apple.AppKit                0x00007fff82717636 __144-[NSDocumentController _coordinateReadingAndGetAlternateContentsForOpeningDocumentAtURL:resolvingSymlinks:thenContinueOnMainThreadWithAccessor:]_block_invoke_2.918 + 180
26  com.apple.AppKit                0x00007fff82717552 __144-[NSDocumentController _coordinateReadingAndGetAlternateContentsForOpeningDocumentAtURL:resolvingSymlinks:thenContinueOnMainThreadWithAccessor:]_block_invoke.917 + 138
27  com.apple.AppKit                0x00007fff82717414 __144-[NSDocumentController _coordinateReadingAndGetAlternateContentsForOpeningDocumentAtURL:resolvingSymlinks:thenContinueOnMainThreadWithAccessor:]_block_invoke_4 + 267
28  com.apple.CoreFoundation        0x00007fff8465630c __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
29  com.apple.CoreFoundation        0x00007fff84637384 __CFRunLoopDoBlocks + 356
30  com.apple.CoreFoundation        0x00007fff84636ec6 __CFRunLoopRun + 1878
31  com.apple.CoreFoundation        0x00007fff84636514 CFRunLoopRunSpecific + 420
32  com.apple.HIToolbox             0x00007fff83bc72ac RunCurrentEventLoopInMode + 240
33  com.apple.HIToolbox             0x00007fff83bc70e1 ReceiveNextEventCommon + 432
34  com.apple.HIToolbox             0x00007fff83bc6f16 _BlockUntilNextEventMatchingListInModeWithFilter + 71
35  com.apple.AppKit                0x00007fff821c96cd _DPSNextEvent + 1093
36  com.apple.AppKit                0x00007fff82940830 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 2730
37  com.apple.AppKit                0x00007fff821be06d -[NSApplication run] + 926
38  com.apple.AppKit                0x00007fff82188983 NSApplicationMain + 1237
39  libdyld.dylib                   0x00007fff9989e255 start + 1

Thread 1:
0   libsystem_kernel.dylib          0x00007fff999c541a mach_msg_trap + 10
1   libsystem_kernel.dylib          0x00007fff999c4867 mach_msg + 55
2   net.hockeyapp.sdk.mac           0x000000010a6e90f2 exception_server_thread + 201
3   libsystem_pthread.dylib         0x00007fff99ab5aab _pthread_body + 180
4   libsystem_pthread.dylib         0x00007fff99ab59f7 _pthread_start + 286
5   libsystem_pthread.dylib         0x00007fff99ab5221 thread_start + 13

Thread 2:: com.apple.NSEventThread
0   libsystem_kernel.dylib          0x00007fff999c541a mach_msg_trap + 10
1   libsystem_kernel.dylib          0x00007fff999c4867 mach_msg + 55
2   com.apple.CoreFoundation        0x00007fff84637834 __CFRunLoopServiceMachPort + 212
3   com.apple.CoreFoundation        0x00007fff84636cc1 __CFRunLoopRun + 1361
4   com.apple.CoreFoundation        0x00007fff84636514 CFRunLoopRunSpecific + 420
5   com.apple.AppKit                0x00007fff823167d4 _NSEventThread + 205
6   libsystem_pthread.dylib         0x00007fff99ab5aab _pthread_body + 180
7   libsystem_pthread.dylib         0x00007fff99ab59f7 _pthread_start + 286
8   libsystem_pthread.dylib         0x00007fff99ab5221 thread_start + 13

Thread 3:: com.apple.NSURLConnectionLoader
0   libsystem_kernel.dylib          0x00007fff999c541a mach_msg_trap + 10
1   libsystem_kernel.dylib          0x00007fff999c4867 mach_msg + 55
2   com.apple.CoreFoundation        0x00007fff84637834 __CFRunLoopServiceMachPort + 212
3   com.apple.CoreFoundation        0x00007fff84636cc1 __CFRunLoopRun + 1361
4   com.apple.CoreFoundation        0x00007fff84636514 CFRunLoopRunSpecific + 420
5   com.apple.CFNetwork             0x00007fff837fa334 +[NSURLConnection(Loader) _resourceLoadLoop:] + 313
6   com.apple.Foundation            0x00007fff8604430d __NSThread__start__ + 1243
7   libsystem_pthread.dylib         0x00007fff99ab5aab _pthread_body + 180
8   libsystem_pthread.dylib         0x00007fff99ab59f7 _pthread_start + 286
9   libsystem_pthread.dylib         0x00007fff99ab5221 thread_start + 13

Thread 4:
0   libsystem_kernel.dylib          0x00007fff999cd4e6 __workq_kernreturn + 10
1   libsystem_pthread.dylib         0x00007fff99ab57b5 _pthread_wqthread + 1426
2   libsystem_pthread.dylib         0x00007fff99ab5211 start_wqthread + 13

Thread 5:
0   libsystem_kernel.dylib          0x00007fff999cd4e6 __workq_kernreturn + 10
1   libsystem_pthread.dylib         0x00007fff99ab5622 _pthread_wqthread + 1023
2   libsystem_pthread.dylib         0x00007fff99ab5211 start_wqthread + 13

Thread 6:: Dispatch queue: Query work queue
0   libsystem_kernel.dylib          0x00007fff999ccc8a __psynch_cvwait + 10
1   libsystem_pthread.dylib         0x00007fff99ab696a _pthread_cond_wait + 712
2   com.apple.Metadata              0x00007fff859475b2 _pushNotification + 498
3   com.apple.Metadata              0x00007fff85946a1f processUpdatesLocked + 122
4   com.apple.Metadata              0x00007fff8593fc2b tryProcessUpdates + 661
5   com.apple.Metadata              0x00007fff8594603c _MDQueryCallback + 240
6   com.apple.Metadata              0x00007fff8597a22e __handleQueryResults_block_invoke + 52
7   libdispatch.dylib               0x00007fff99870f5f _dispatch_call_block_and_release + 12
8   libdispatch.dylib               0x00007fff99868128 _dispatch_client_callout + 8
9   libdispatch.dylib               0x00007fff9987eb97 _dispatch_queue_serial_drain + 896
10  libdispatch.dylib               0x00007fff99870d41 _dispatch_queue_invoke + 1046
11  libdispatch.dylib               0x00007fff99869ee0 _dispatch_root_queue_drain + 476
12  libdispatch.dylib               0x00007fff99869cb7 _dispatch_worker_thread3 + 99
13  libsystem_pthread.dylib         0x00007fff99ab5736 _pthread_wqthread + 1299
14  libsystem_pthread.dylib         0x00007fff99ab5211 start_wqthread + 13

Thread 7:
0   libsystem_kernel.dylib          0x00007fff999cd4e6 __workq_kernreturn + 10
1   libsystem_pthread.dylib         0x00007fff99ab57b5 _pthread_wqthread + 1426
2   libsystem_pthread.dylib         0x00007fff99ab5211 start_wqthread + 13

Thread 8:
0   libsystem_kernel.dylib          0x00007fff999cd4e6 __workq_kernreturn + 10
1   libsystem_pthread.dylib         0x00007fff99ab57b5 _pthread_wqthread + 1426
2   libsystem_pthread.dylib         0x00007fff99ab5211 start_wqthread + 13

Thread 9:
0   libsystem_kernel.dylib          0x00007fff999cd4e6 __workq_kernreturn + 10
1   libsystem_pthread.dylib         0x00007fff99ab57b5 _pthread_wqthread + 1426
2   libsystem_pthread.dylib         0x00007fff99ab5211 start_wqthread + 13

Thread 10:
0   libsystem_kernel.dylib          0x00007fff999cd4e6 __workq_kernreturn + 10
1   libsystem_pthread.dylib         0x00007fff99ab5622 _pthread_wqthread + 1023
2   libsystem_pthread.dylib         0x00007fff99ab5211 start_wqthread + 13

Thread 11:
0   libsystem_pthread.dylib         0x00007fff99ab5204 start_wqthread + 0
1   ???                             0x000000010a67b000 0 + 4469534720

Thread 12:
0   libsystem_pthread.dylib         0x00007fff99ab5204 start_wqthread + 0

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000000  rbx: 0x0000000000000006  rcx: 0x00007fff555f4f98  rdx: 0x0000000000000000
  rdi: 0x0000000000000307  rsi: 0x0000000000000006  rbp: 0x00007fff555f4fc0  rsp: 0x00007fff555f4f98
   r8: 0x0000000000000000   r9: 0x000000000000800d  r10: 0x0000000008000000  r11: 0x0000000000000206
  r12: 0x0000000000000025  r13: 0x00007f8b458a7400  r14: 0x00007fffa268e3c0  r15: 0x00007fff555f5490
  rip: 0x00007fff999ccdda  rfl: 0x0000000000000206  cr2: 0x0000000111c73020

Logical CPU:     0
Error Code:      0x020000b8
Trap Number:     133


Binary Images:
       0x10a608000 -        0x10a643ff7 +io.realm.realmbrowser (2.1.6 - 90) <C95AE11B-CCF7-3888-BF06-44B0CD2EA3EC> /Applications/Realm Browser.app/Contents/MacOS/Realm Browser
       0x10a667000 -        0x10a66dff7 +org.cocoapods.AppSandboxFileAccess (1.0.14 - 1) <E70FBA2B-835C-3634-AAB7-A43F7EFA271A> /Applications/Realm Browser.app/Contents/Frameworks/AppSandboxFileAccess.framework/Versions/A/AppSandboxFileAccess
       0x10a67d000 -        0x10a688ffb +org.cocoapods.CSwiftV (0.0.5 - 1) <5ED3F140-3DDD-30CA-9A9D-370CE602097B> /Applications/Realm Browser.app/Contents/Frameworks/CSwiftV.framework/Versions/A/CSwiftV
       0x10a6a4000 -        0x10a723ff7 +net.hockeyapp.sdk.mac (4.1.3 - 60) <78D45087-AB82-39AE-BA3E-C6E1FC83313D> /Applications/Realm Browser.app/Contents/Frameworks/HockeySDK.framework/Versions/A/HockeySDK
       0x10a7b9000 -        0x10a7cdfff +org.cocoapods.PathKit (0.6.0 - 1) <9611B2C3-B008-3B14-8AED-3BD75BD0D7AB> /Applications/Realm Browser.app/Contents/Frameworks/PathKit.framework/Versions/A/PathKit
       0x10a7f8000 -        0x10abd7ff7 +org.cocoapods.Realm (2.4.3 - 1) <2B6A2015-D0CE-3077-A2E7-5D5DA4B3386C> /Applications/Realm Browser.app/Contents/Frameworks/Realm.framework/Versions/A/Realm
       0x10ae34000 -        0x10ae56ff7 +org.cocoapods.RealmConverter (0.3.1 - 1) <51F9C8CD-8CFF-3252-BF5A-E0C86139A091> /Applications/Realm Browser.app/Contents/Frameworks/RealmConverter.framework/Versions/A/RealmConverter
       0x10ae99000 -        0x10aeb6ff7 +org.cocoapods.SSZipArchive (1.6.2 - 1) <7DC1E099-1AED-3F24-93D0-36F5574984CA> /Applications/Realm Browser.app/Contents/Frameworks/SSZipArchive.framework/Versions/A/SSZipArchive
       0x10aed0000 -        0x10aedcff7 +org.cocoapods.TGSpreadsheetWriter (1.0.2 - 1) <98CC9E99-9E99-3C68-B32F-33FB4243096F> /Applications/Realm Browser.app/Contents/Frameworks/TGSpreadsheetWriter.framework/Versions/A/TGSpreadsheetWriter
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       0x10af02000 -        0x10b156ff7 +libswiftCore.dylib (2.3 - 800.10.13) <DC48F168-7FC6-38EB-8989-52010E6A728A> /Applications/Realm Browser.app/Contents/Frameworks/libswiftCore.dylib
       0x10b393000 -        0x10b397fff +libswiftCoreData.dylib (2.3 - 800.10.13) <43A06679-99CA-387C-9039-B3379CA26C90> /Applications/Realm Browser.app/Contents/Frameworks/libswiftCoreData.dylib
       0x10b39e000 -        0x10b3a8ff7 +libswiftCoreGraphics.dylib (2.3 - 800.10.13) <4EAD9644-1A9B-31D9-B5D6-45A38DE366EF> /Applications/Realm Browser.app/Contents/Frameworks/libswiftCoreGraphics.dylib
       0x10b3c2000 -        0x10b3c6fff +libswiftCoreImage.dylib (2.3 - 800.10.13) <1C027580-253B-35C2-9692-F2B0218CAA6A> /Applications/Realm Browser.app/Contents/Frameworks/libswiftCoreImage.dylib
       0x10b3d2000 -        0x10b3d7fff +libswiftDarwin.dylib (2.3 - 800.10.13) <8B187985-281F-385B-BA71-5F80DB0D3285> /Applications/Realm Browser.app/Contents/Frameworks/libswiftDarwin.dylib
       0x10b3e5000 -        0x10b3e8fff +libswiftDispatch.dylib (2.3 - 800.10.13) <6F49DA1B-3931-36A1-ACAE-8ACDBDCE47D0> /Applications/Realm Browser.app/Contents/Frameworks/libswiftDispatch.dylib
       0x10b3f0000 -        0x10b431fff +libswiftFoundation.dylib (2.3 - 800.10.13) <C0FC3B03-DE60-33F9-AA23-3A4D686FF76D> /Applications/Realm Browser.app/Contents/Frameworks/libswiftFoundation.dylib
       0x10b47d000 -        0x10b480ff3 +libswiftIOKit.dylib (2.3 - 800.10.13) <A44420AE-3CE7-34D0-BF64-9846ACCDE33D> /Applications/Realm Browser.app/Contents/Frameworks/libswiftIOKit.dylib
       0x10b48c000 -        0x10b491fff +libswiftObjectiveC.dylib (2.3 - 800.10.13) <212E39AC-CBA3-37CE-91B9-4281C20DE684> /Applications/Realm Browser.app/Contents/Frameworks/libswiftObjectiveC.dylib
       0x10cafd000 -        0x10cb3a287  dyld (421.2) <F5F79617-5669-3424-A2CF-18B23BB0C0C7> /usr/lib/dyld
       0x10ed83000 -        0x10f2efff7  com.apple.driver.AppleIntelHD5000GraphicsGLDriver (10.20.25 - 10.2.0) <CA8AE295-55B8-3289-8F1F-22BEBA1F3E0D> /System/Library/Extensions/AppleIntelHD5000GraphicsGLDriver.bundle/Contents/MacOS/AppleIntelHD5000GraphicsGLDriver
       0x10f501000 -        0x10f578ff7  com.apple.driver.AppleIntelHD5000GraphicsMTLDriver (10.20.25 - 10.2.0) <E35D8101-F34A-31C3-86B1-E6698AC9CF51> /System/Library/Extensions/AppleIntelHD5000GraphicsMTLDriver.bundle/Contents/MacOS/AppleIntelHD5000GraphicsMTLDriver
       0x110a03000 -        0x110a1ffff  com.apple.security.csparser (3.0 - 57740.20.22) <80372D4E-3666-300E-9376-A92097A19E3C> /System/Library/Frameworks/Security.framework/PlugIns/csparser.bundle/Contents/MacOS/csparser
       0x111c6f000 -        0x111c70ff1 +cl_kernels (???) <6EBFB7C7-3FD7-4557-A9B7-3D48E1BBB9CD> cl_kernels
    0x7fff7f320000 -     0x7fff7f658fff  com.apple.RawCamera.bundle (7.00 - 874) <99AF1865-BCDD-3313-85BF-E246745201F0> /System/Library/CoreServices/RawCamera.bundle/Contents/MacOS/RawCamera
    0x7fff80e7d000 -     0x7fff8103bff7  com.apple.avfoundation (2.0 - 1183.4) <BF237CEA-F7CB-3ECD-AAE4-E9589D02C2F9> /System/Library/Frameworks/AVFoundation.framework/Versions/A/AVFoundation
    0x7fff8103c000 -     0x7fff810dfff7  com.apple.audio.AVFAudio (1.0 - ???) <18E472FC-5AD7-33B8-8D46-49D5AC2DB13A> /System/Library/Frameworks/AVFoundation.framework/Versions/A/Frameworks/AVFAudio.framework/Versions/A/AVFAudio
    0x7fff811a7000 -     0x7fff811a7fff  com.apple.Accelerate (1.11 - Accelerate 1.11) <D700DBDF-69AE-37A2-B9C7-0961CF0B6841> /System/Library/Frameworks/Accelerate.framework/Versions/A/Accelerate
    0x7fff811a8000 -     0x7fff811bfffb  libCGInterfaces.dylib (331.5) <68CF8C0C-63D5-3F6D-B40B-ECFAEBAEE558> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vImage.framework/Versions/A/Libraries/libCGInterfaces.dylib
    0x7fff811c0000 -     0x7fff816d9feb  com.apple.vImage (8.1 - ???) <BE66DAAF-2955-3C36-8D6C-1518503A7F4C> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vImage.framework/Versions/A/vImage
    0x7fff816da000 -     0x7fff8184aff3  libBLAS.dylib (1185) <C7E42BBE-2337-3AEF-9C45-A2F2CB1A5B3E> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
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    0x7fff983a0000 -     0x7fff98414fff  libate.dylib (1.12.12) <DD989482-B873-3094-97BB-2B5AE8D3B544> /usr/lib/libate.dylib
    0x7fff98418000 -     0x7fff98418ff3  libauto.dylib (187) <5BBF6A00-CC76-389D-84E7-CA88EDADE683> /usr/lib/libauto.dylib
    0x7fff98419000 -     0x7fff98429ff3  libbsm.0.dylib (34) <20084796-B04D-3B35-A003-EA11459557A9> /usr/lib/libbsm.0.dylib
    0x7fff9842a000 -     0x7fff98438ff7  libbz2.1.0.dylib (38) <6FD3B63F-0F86-3A25-BD5B-E243F58792C9> /usr/lib/libbz2.1.0.dylib
    0x7fff98439000 -     0x7fff9848fff7  libc++.1.dylib (307.4) <BEE86868-F831-384C-919E-2B286ACFE87C> /usr/lib/libc++.1.dylib
    0x7fff98490000 -     0x7fff984bafff  libc++abi.dylib (307.2) <1CEF8ABB-7E6D-3C2F-8E0A-E7884478DD23> /usr/lib/libc++abi.dylib
    0x7fff984bb000 -     0x7fff984cbffb  libcmph.dylib (6) <2B5D405E-2D0B-3320-ABD6-622934C86ABE> /usr/lib/libcmph.dylib
    0x7fff984cc000 -     0x7fff984e1fc3  libcompression.dylib (34) <1691D6F2-46CD-3DA6-B44F-24CDD9BD0E4E> /usr/lib/libcompression.dylib
    0x7fff984e2000 -     0x7fff984e2ff7  libcoretls.dylib (121.1.1) <F3BAB54C-DA82-37C3-A218-46FEB179D555> /usr/lib/libcoretls.dylib
    0x7fff984e3000 -     0x7fff984e4ffb  libcoretls_cfhelpers.dylib (121.1.1) <D12709F3-BBE3-3CF7-9070-C2A0803F5526> /usr/lib/libcoretls_cfhelpers.dylib
    0x7fff9859e000 -     0x7fff98682ff3  libcrypto.0.9.8.dylib (64) <4CB423CE-0B86-334A-9335-FEE75198024F> /usr/lib/libcrypto.0.9.8.dylib
    0x7fff98820000 -     0x7fff98873ff7  libcups.2.dylib (450) <04CA1F55-4B70-3D65-B4B1-62F6C271A9EF> /usr/lib/libcups.2.dylib
    0x7fff988c4000 -     0x7fff988cbff3  libdscsym.dylib (145) <A130C01E-AC0A-3733-B34C-71741DFFCC7E> /usr/lib/libdscsym.dylib
    0x7fff988ed000 -     0x7fff988edfff  libenergytrace.dylib (15) <A1B040A2-7977-3097-9ADF-34FF181EB970> /usr/lib/libenergytrace.dylib
    0x7fff988fd000 -     0x7fff98902ff7  libheimdal-asn1.dylib (498.20.2) <C9B5464F-4A2E-3E3F-B514-B0911B5CB0DA> /usr/lib/libheimdal-asn1.dylib
    0x7fff98903000 -     0x7fff989f5ff7  libiconv.2.dylib (50) <42125B35-81D7-3FC4-9475-A26DBE10884D> /usr/lib/libiconv.2.dylib
    0x7fff989f6000 -     0x7fff98c1bfff  libicucore.A.dylib (57132.0.1) <063DBF01-CEF8-3C2E-9917-A08358BB006D> /usr/lib/libicucore.A.dylib
    0x7fff98c21000 -     0x7fff98c22fff  liblangid.dylib (126) <3F4530C9-8BE1-3AA7-9A82-98694D240866> /usr/lib/liblangid.dylib
    0x7fff98c23000 -     0x7fff98c3cffb  liblzma.5.dylib (10) <44BD0279-99DD-36B5-8A6E-C11432E2098D> /usr/lib/liblzma.5.dylib
    0x7fff98c3d000 -     0x7fff98c53ff7  libmarisa.dylib (5) <2183D484-032D-3DE5-8984-3A14006E034E> /usr/lib/libmarisa.dylib
    0x7fff98c54000 -     0x7fff98efefff  libmecabra.dylib (744.2.2) <85517A89-7625-3AF7-AC54-E82729271E14> /usr/lib/libmecabra.dylib
    0x7fff98f31000 -     0x7fff98faaff3  libnetwork.dylib (856.20.4) <505C4AC1-1D7C-3879-AF82-B0CF78A487AD> /usr/lib/libnetwork.dylib
    0x7fff98fab000 -     0x7fff9937bd97  libobjc.A.dylib (706) <F9AFE665-A3A2-3285-9495-19803A565861> /usr/lib/libobjc.A.dylib
    0x7fff9937e000 -     0x7fff99382fff  libpam.2.dylib (21) <352F8FF6-2248-3594-B357-8D031DEFB06C> /usr/lib/libpam.2.dylib
    0x7fff99383000 -     0x7fff993b3ff7  libpcap.A.dylib (67) <450DB888-2C0C-3085-A5F1-69324DFE902C> /usr/lib/libpcap.A.dylib
    0x7fff993d1000 -     0x7fff993edffb  libresolv.9.dylib (64) <A244AE4C-00B0-396C-98FF-97FE4DB3DA30> /usr/lib/libresolv.9.dylib
    0x7fff993ee000 -     0x7fff99427ff3  libsandbox.1.dylib (592.21.2) <16F4EFB7-778C-3932-94CB-5431EAEF7875> /usr/lib/libsandbox.1.dylib
    0x7fff9943b000 -     0x7fff9943cff3  libspindump.dylib (229) <322AE558-5040-3F9A-8203-F64D8B0B507A> /usr/lib/libspindump.dylib
    0x7fff9943d000 -     0x7fff99585fff  libsqlite3.dylib (252) <FCA29CD2-E8E4-3324-8E2C-19BDC11F0338> /usr/lib/libsqlite3.dylib
    0x7fff99677000 -     0x7fff99684fff  libxar.1.dylib (354) <AAFCF321-8100-3622-880B-9661DCA35D69> /usr/lib/libxar.1.dylib
    0x7fff99688000 -     0x7fff99777ffb  libxml2.2.dylib (30.11) <26676155-64CE-323F-B73C-AD77AF5982E8> /usr/lib/libxml2.2.dylib
    0x7fff99778000 -     0x7fff997a1fff  libxslt.1.dylib (15.8) <FFF5DD45-F544-34B2-BE3C-DB877DC60081> /usr/lib/libxslt.1.dylib
    0x7fff997a2000 -     0x7fff997b3ff3  libz.1.dylib (67) <46E3FFA2-4328-327A-8D34-A03E20BFFB8E> /usr/lib/libz.1.dylib
    0x7fff997c2000 -     0x7fff997c6ff7  libcache.dylib (79) <84E55656-FDA9-3B29-9E4F-BE31B2C0AA3C> /usr/lib/system/libcache.dylib
    0x7fff997c7000 -     0x7fff997d1fff  libcommonCrypto.dylib (60092.20.1) <D2711CB2-2D9A-3238-8082-CDB8AE60017F> /usr/lib/system/libcommonCrypto.dylib
    0x7fff997d2000 -     0x7fff997d9fff  libcompiler_rt.dylib (62) <486BDE52-81B4-3446-BD72-23977CAE556F> /usr/lib/system/libcompiler_rt.dylib
    0x7fff997da000 -     0x7fff997e2fff  libcopyfile.dylib (138) <0DA49B77-56EC-362D-98FF-FA78CFD986D6> /usr/lib/system/libcopyfile.dylib
    0x7fff997e3000 -     0x7fff99865fdb  libcorecrypto.dylib (442.20.2) <9846F683-6CED-3CE5-AE8A-B0A681F7FEEF> /usr/lib/system/libcorecrypto.dylib
    0x7fff99866000 -     0x7fff99898fff  libdispatch.dylib (703.20.1) <FDC0F71D-A415-306A-ABE8-CA21E25A55BB> /usr/lib/system/libdispatch.dylib
    0x7fff99899000 -     0x7fff9989eff3  libdyld.dylib (421.2) <7BFA3476-6210-3BCB-8CE8-9B952F87BD84> /usr/lib/system/libdyld.dylib
    0x7fff9989f000 -     0x7fff9989fffb  libkeymgr.dylib (28) <09CD7CA6-46D2-3A9F-B9F1-7C4CA5CA0D68> /usr/lib/system/libkeymgr.dylib
    0x7fff998a0000 -     0x7fff998acffb  libkxld.dylib (3789.21.4) <95D9F58B-735C-3588-9736-B2B761D6D8CF> /usr/lib/system/libkxld.dylib
    0x7fff998ad000 -     0x7fff998adfff  liblaunch.dylib (972.20.3) <7AB2E2EA-8B47-3420-87CE-5EE18A4EEE49> /usr/lib/system/liblaunch.dylib
    0x7fff998ae000 -     0x7fff998b3fff  libmacho.dylib (894) <1EAE5ADD-490C-3B1F-9F97-447BA8E0E90F> /usr/lib/system/libmacho.dylib
    0x7fff998b4000 -     0x7fff998b6ff3  libquarantine.dylib (85) <78EF62D8-C890-3FC0-937A-C2FD8CEF8992> /usr/lib/system/libquarantine.dylib
    0x7fff998b7000 -     0x7fff998b8ffb  libremovefile.dylib (45) <C4FC07FF-ED86-382E-B06F-33C34718080C> /usr/lib/system/libremovefile.dylib
    0x7fff998b9000 -     0x7fff998d1ff7  libsystem_asl.dylib (349.1.1) <2217DE86-0635-393E-93DD-A1344EC0EF4B> /usr/lib/system/libsystem_asl.dylib
    0x7fff998d2000 -     0x7fff998d2ff7  libsystem_blocks.dylib (67) <B8C3701D-5A91-3D35-999D-2DC8D5393525> /usr/lib/system/libsystem_blocks.dylib
    0x7fff998d3000 -     0x7fff99960fef  libsystem_c.dylib (1158.20.4) <FB1702C3-C521-37BD-91CB-559168785D22> /usr/lib/system/libsystem_c.dylib
    0x7fff99961000 -     0x7fff99964ffb  libsystem_configuration.dylib (888.20.5) <D7FC38C6-794C-3C26-AE4F-020A72E1BB79> /usr/lib/system/libsystem_configuration.dylib
    0x7fff99965000 -     0x7fff99968fff  libsystem_coreservices.dylib (41.2) <ADE57FD1-AFEB-3E86-820D-E4F28330F76A> /usr/lib/system/libsystem_coreservices.dylib
    0x7fff99969000 -     0x7fff99981ffb  libsystem_coretls.dylib (121.1.1) <8F7E9B12-400D-3276-A9C5-4546B0258554> /usr/lib/system/libsystem_coretls.dylib
    0x7fff99982000 -     0x7fff99988fff  libsystem_dnssd.dylib (765.20.4) <49E37AB9-776C-3F84-8AC2-9BDD0438ED9D> /usr/lib/system/libsystem_dnssd.dylib
    0x7fff99989000 -     0x7fff999b2fff  libsystem_info.dylib (503) <C686B834-5E7D-382C-AF6E-44AB78EE83E2> /usr/lib/system/libsystem_info.dylib
    0x7fff999b3000 -     0x7fff999d5ff7  libsystem_kernel.dylib (3789.21.4) <651F249F-D797-3FBD-A66F-66DFB48FCF38> /usr/lib/system/libsystem_kernel.dylib
    0x7fff999d6000 -     0x7fff99a1dfe7  libsystem_m.dylib (3121.4) <E3370D16-EBAA-3C7F-AC56-2D6EAD7DB0A4> /usr/lib/system/libsystem_m.dylib
    0x7fff99a1e000 -     0x7fff99a3cff7  libsystem_malloc.dylib (116) <3DD17B88-B7A4-38B9-9E95-AB88E1C3B647> /usr/lib/system/libsystem_malloc.dylib
    0x7fff99a3d000 -     0x7fff99a94ff3  libsystem_network.dylib (856.20.4) <0F16BBE0-3092-390E-96D9-0B5DCC97B317> /usr/lib/system/libsystem_network.dylib
    0x7fff99a95000 -     0x7fff99a9eff3  libsystem_networkextension.dylib (563.20.3) <C8C8807B-F5C1-307E-8D67-02793B62E9ED> /usr/lib/system/libsystem_networkextension.dylib
    0x7fff99a9f000 -     0x7fff99aa8ff3  libsystem_notify.dylib (165.20.1) <D38E3A3C-AEEE-321A-861E-160ABE4B20B4> /usr/lib/system/libsystem_notify.dylib
    0x7fff99aa9000 -     0x7fff99ab1fe7  libsystem_platform.dylib (126.1.2) <884DDF42-3CAE-334A-82CE-965617130FB1> /usr/lib/system/libsystem_platform.dylib
    0x7fff99ab2000 -     0x7fff99abcff7  libsystem_pthread.dylib (218.20.1) <F35891AC-CA82-3F97-9BE6-15EC3B4C36F6> /usr/lib/system/libsystem_pthread.dylib
    0x7fff99abd000 -     0x7fff99ac0ff7  libsystem_sandbox.dylib (592.21.2) <FCF7F7C2-79B5-321F-901D-A190CD3D22A2> /usr/lib/system/libsystem_sandbox.dylib
    0x7fff99ac1000 -     0x7fff99ac2fff  libsystem_secinit.dylib (24) <A54B8FEF-E792-3C54-8E0B-E80A376662F2> /usr/lib/system/libsystem_secinit.dylib
    0x7fff99ac3000 -     0x7fff99acafff  libsystem_symptoms.dylib (532.1.1) <B26F656E-94F9-3834-9B03-51C4FF11D1BF> /usr/lib/system/libsystem_symptoms.dylib
    0x7fff99acb000 -     0x7fff99aebff7  libsystem_trace.dylib (518.20.8) <046443DA-0474-3A73-A69F-1DC21C49B8AD> /usr/lib/system/libsystem_trace.dylib
    0x7fff99aec000 -     0x7fff99af1ffb  libunwind.dylib (35.3) <9F7C2AD8-A9A7-3DE4-828D-B0F0F166AAA0> /usr/lib/system/libunwind.dylib
    0x7fff99af2000 -     0x7fff99b1bff7  libxpc.dylib (972.20.3) <CE86F4BA-EF31-33BD-8AC3-7BF25F632FA9> /usr/lib/system/libxpc.dylib

External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 4
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 47207
    thread_create: 0
    thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=316.6M resident=0K(0%) swapped_out_or_unallocated=316.6M(100%)
Writable regions: Total=171.1M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=171.1M(100%)

                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Accelerate framework               512K        5 
Activity Tracing                   256K        2 
CG backing stores                 4952K        6 
CG image                           236K       23 
CoreAnimation                      712K       21 
CoreUI image data                 3676K       25 
CoreUI image file                  220K        5 
Foundation                           4K        2 
Image IO                           332K        5 
Kernel Alloc Once                    8K        2 
MALLOC                           130.8M       40 
MALLOC guard page                   48K       10 
Memory Tag 242                      12K        2 
OpenCL                              16K        3 
SQLite page cache                   64K        2 
STACK GUARD                       56.0M       14 
Stack                             14.1M       14 
VM_ALLOCATE                        304K       33 
__DATA                            29.0M      278 
__GLSLBUILTINS                    2588K        2 
__IMAGE                            528K        2 
__LINKEDIT                       120.3M       26 
__TEXT                           196.3M      280 
__UNICODE                          556K        2 
mapped file                      174.6M       56 
shared memory                     16.4M       14 
===========                     =======  ======= 
TOTAL                            752.2M      848 

Model: MacBookPro11,4, BootROM MBP114.0172.B09, 4 processors, Intel Core i7, 2.2 GHz, 16 GB, SMC 2.29f24
Graphics: Intel Iris Pro, Intel Iris Pro, Built-In
Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54343147533642465238412D50422020
Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54343147533642465238412D50422020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x152), Broadcom BCM43xx 1.0 (7.21.171.47.1a8)
Bluetooth: Version 5.0.1f7, 3 services, 27 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en0
Serial ATA Device: APPLE SSD SM0256G, 251 GB
USB Device: USB 3.0 Bus
USB Device: Apple Internal Keyboard / Trackpad
USB Device: Bluetooth USB Host Controller
USB Device: iPhone
Thunderbolt Bus: MacBook Pro, Apple Inc., 27.1

The relevant frame from the backtrace is:

7   org.cocoapods.Realm             0x000000010aa56ea5 realm::Group::attach(unsigned long, bool) + 581

That corresponds to the REALM_ASSERT_3(top_size, ==, 9) within Group::attach. That definitely means that some of the data in the file is not valid.

If you can confirm that the files are making it unchanged from the originating device to the Mac you're opening them on, then that would indicate there's a bug either in how we're writing out the copy of the Realm, or in opening the copy. I think we'd likely need copies of an original Realm file and its copy to investigate. Feel free to email them to [email protected], referencing this issue number, once you've confirmed that the file's are making it unharmed from the device -> S3 -> your computer.

I wonder if this could be due to the issue that realm/realm-core#2480 fixes.

I can't be sure yet, I've made this change to work around a known corruption issue in the S3 SDK: https://github.com/aws/aws-sdk-ios/issues/415#issuecomment-285030692

I've also added checksums to the filenames so I can see when the corruption occurs. I'll report back after my qa team has had a chance to see if this is still happening.

So not sure this is related to your issues but I just spent the last 2 hours banging my head with the same problem. I realized that I changed the time on my device to a future time to test something related to local notifications.

Apparently that was causing the same behavior as the issue reported here. The 2 might be completely unrelated but for anyone stumbling across this issue, it might save you some time to check the date time settings on your device

@cmavromoustakos changing the time on your device shouldn't impact your ability to open Realm files. Could you please file a new issue with detailed steps to reproduce? It's almost certainly unrelated to what this issue is tracking, which is likely corrupt file transfers to/from S3.

Reporting back on this, its was definitely the S3 upload that was the problem here.

I'm happy to hear you managed to track this down!

Update:
I was able to dramatically reduce the number of errors with uploaded realms by (1) the AWS tweak mentioned above and (2) copying the realm before uploading. In the same release as these fixes, I also started putting the md5 checksum in the filename. With these in place, I think I actually do still have a bug here.

The attached realm file matches the md5 generated on the iphone (in the filename), so I know the realm has made it to me intact. When I try to open it with realm browser I get the encryption key ask. This has happened twice for the same user. All other realms that I get with matching checksums open up just fine.

I was able to open that Realm file in Realm Browser locally. It doesn't appear to be corrupt.

Ah, there is an update to the realm browser. I can open it too after upgrading. Thanks!

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