Crash on android 12 on take backup of database

[AsifAliJohari]

SDK and version

SDK : java kotlin ? (Cocoa, Java, etc)
Version: 10.9.0

Observations

• How frequent do the crash occur?
• When i click on create backup on android 12 with no new change in code which already tested on android 10 it crash
• Does it happen in production or during dev/test?
• development
• Can the crash be reproduced by you?
• yes
• Can you provide instructions for how we can reproduce it?

Crash log / stacktrace

/tmp/realm-java/realm/realm-library/src/main/cpp/realm-core/src/realm/util/file.cpp:1028: [realm-core-11.7.0] Assertion failed: r == 0 && "File::unlock()" with (r, (*__errno())) = [-1, 38]
!!! IMPORTANT: Please report this at https://github.com/realm/realm-core/issues/new/choose
2022-11-12 12:09:24.070 13729-13729 libc myapp A Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 13729 (myapp), pid 13729 (myapp)
2022-11-12 12:09:25.130 13962-13962 DEBUG pid-13962 A Cmdline: myapp
2022-11-12 12:09:25.130 13962-13962 DEBUG pid-13962 A pid: 13729, tid: 13729, name: myapp >>> myapp <<<
2022-11-12 12:09:25.130 13962-13962 DEBUG pid-13962 A #1 pc 00000000006391f4 /data/app/~~J2AbeBBneUl9OgNjEY3RaA==/myapp-rOsSiFXlvV9Mex_xdgaLjQ==/base.apk!librealm-jni.so (BuildId: 9dec3713d9a47b404a31a57c3c82d771d45b946e)
2022-11-12 12:09:25.130 13962-13962 DEBUG pid-13962 A #2 pc 00000000006392c8 /data/app/~~J2AbeBBneUl9OgNjEY3RaA==/myapp-rOsSiFXlvV9Mex_xdgaLjQ==/base.apk!librealm-jni.so (BuildId: 9dec3713d9a47b404a31a57c3c82d771d45b946e)
2022-11-12 12:09:25.130 13962-13962 DEBUG pid-13962 A #3 pc 000000000063967c /data/app/~~J2AbeBBneUl9OgNjEY3RaA==/myapp-rOsSiFXlvV9Mex_xdgaLjQ==/base.apk!librealm-jni.so (BuildId: 9dec3713d9a47b404a31a57c3c82d771d45b946e)
2022-11-12 12:09:25.130 13962-13962 DEBUG pid-13962 A #4 pc 00000000006283e8 /data/app/~~J2AbeBBneUl9OgNjEY3RaA==/myapp-rOsSiFXlvV9Mex_xdgaLjQ==/base.apk!librealm-jni.so (BuildId: 9dec3713d9a47b404a31a57c3c82d771d45b946e)
2022-11-12 12:09:25.130 13962-13962 DEBUG pid-13962 A #5 pc 00000000006264b4 /data/app/~~J2AbeBBneUl9OgNjEY3RaA==/myapp-rOsSiFXlvV9Mex_xdgaLjQ==/base.apk!librealm-jni.so (BuildId: 9dec3713d9a47b404a31a57c3c82d771d45b946e)
2022-11-12 12:09:25.130 13962-13962 DEBUG pid-13962 A #6 pc 0000000000565704 /data/app/~~J2AbeBBneUl9OgNjEY3RaA==/myapp-rOsSiFXlvV9Mex_xdgaLjQ==/base.apk!librealm-jni.so (BuildId: 9dec3713d9a47b404a31a57c3c82d771d45b946e)
2022-11-12 12:09:25.130 13962-13962 DEBUG pid-13962 A #7 pc 000000000041e9c4 /data/app/~~J2AbeBBneUl9OgNjEY3RaA==/myapp-rOsSiFXlvV9Mex_xdgaLjQ==/base.apk!librealm-jni.so (BuildId: 9dec3713d9a47b404a31a57c3c82d771d45b946e)
2022-11-12 12:09:25.130 13962-13962 DEBUG pid-13962 A #8 pc 000000000039c22c /data/app/~~J2AbeBBneUl9OgNjEY3RaA==/myapp-rOsSiFXlvV9Mex_xdgaLjQ==/base.apk!librealm-jni.so (Java_io_realm_internal_OsSharedRealm_nativeWriteCopy+116) (BuildId: 9dec3713d9a47b404a31a57c3c82d771d45b946e)
2022-11-12 12:09:25.130 13962-13962 DEBUG pid-13962 A #15 pc 000000000049998a [anon:dalvik-classes.dex extracted in memory from /data/app/~~J2AbeBBneUl9OgNjEY3RaA==/myapp-rOsSiFXlvV9Mex_xdgaLjQ==/base.apk] (io.realm.internal.OsSharedRealm.writeCopy+78)
2022-11-12 12:09:25.131 13962-13962 DEBUG pid-13962 A #21 pc 00000000004d2264 [anon:dalvik-classes19.dex extracted in memory from /data/app/~~J2AbeBBneUl9OgNjEY3RaA==/myapp-rOsSiFXlvV9Mex_xdgaLjQ==/base.apk!classes19.dex] (io.realm.BaseRealm.writeCopyTo+16)
2022-11-12 12:09:25.131 13962-13962 DEBUG pid-13962 A #27 pc 00000000004f3010 [anon:dalvik-classes19.dex extracted in memory from /data/app/~~J2AbeBBneUl9OgNjEY3RaA==/myapp-rOsSiFXlvV9Mex_xdgaLjQ==/base.apk!classes19.dex] (io.realm.Realm.writeCopyTo+0)
2022-11-12 12:09:25.131 13962-13962 DEBUG pid-13962 A #33 pc 0000000000005e6a /data/data/myapp/code_cache/.overlay/base.apk/classes7.dex (myapp.app.data.local.db.RealmBackupRestore.backup+266)
2022-11-12 12:09:25.131 13962-13962 DEBUG pid-13962 A #39 pc 000000000000e48a /data/data/myapp/code_cache/.overlay/base.apk/classes8.dex (myapp.app.ui.other.MoreFragment.onViewCreated$lambda-11+50)
2022-11-12 12:09:25.131 13962-13962 DEBUG pid-13962 A #42 pc 000000000000d6c4 /data/data/myapp/code_cache/.overlay/base.apk/classes8.dex myapp.app.ui.other.MoreFragment.$r8$lambda$eTiY7XCYZA0pIvBO0CbKvojI6Pk+0)
2022-11-12 12:09:25.131 13962-13962 DEBUG pid-13962 A #45 pc 000000000000cad4 /data/data/myapp/code_cache/.overlay/base.apk/classes8.dex (myapp.app.ui.other.MoreFragment$$ExternalSyntheticLambda9.onClick+8)

Steps & Code to Reproduce

fun backup(UserIDnumber: String?) {
if (BuildConfig.DEBUG) {
Log.d(TAG, "realm$realm")
Log.d(TAG, "Realm.getDefaultInstance()" + Realm.getDefaultInstance())
}
var exportRealmFile: File? = null
// File exportRealmPATH = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
val exportRealmPATH =
File("${if (Build.VERSION.SDK_INT > Build.VERSION_CODES.Q) context.externalMediaDirs.firstOrNull()?.path?: context.getExternalFilesDir(null) else Environment.getExternalStorageDirectory().path}/myapp/Backup/")

  // File(Environment.getExternalStorageDirectory().path + "/myapp/Backup/")
    if (!exportRealmPATH.exists()) {
        exportRealmPATH.mkdirs()
    }
    val exportRealmFileName = "myapp.realm"
    try {
        val compressFiles = arrayOfNulls<String>(2)


        // create a backup file
        exportRealmFile = File(exportRealmPATH, exportRealmFileName)

        // if backup file already exists, delete it
        exportRealmFile.delete()

        // copy current realm to backup file
        realm.writeCopyTo(exportRealmFile)
        val gpxfile = File(exportRealmPATH, "config")
        val writer = FileWriter(gpxfile)
        writer.append(UserIDnumber)
        writer.flush()
        writer.close()
        compressFiles[0] = "$exportRealmPATH/myapp.realm"
        compressFiles[1] = "$exportRealmPATH/config"
        val ts =
            exportRealmPATH.toString() + "/" + (System.currentTimeMillis() / 1000) + "_backup.myapp"
        zip(compressFiles, ts, File(compressFiles[0]), File(compressFiles[1]))
    } catch (e: Exception) {
        e.printStackTrace()
    }
    val msg = "File exported to Path: " + exportRealmPATH.path
    Log.d(TAG, msg)
    realm.close()
}

[ironage]

Hi @AsifAliJohari thanks for reporting this. What kind of file system is the external storage directory located on? Does the code work if you use a different file system?
@cmelchior do you see any problems in the provided code sample?

[cmelchior]

@AsifAliJohari It looks like you are hitting the new security restrictions introduced in Android 11 which require you to use the Scoped Storage API's: https://developer.android.com/about/versions/11/privacy/storage

These API's prevent Realm from opening and using Realm files on external storage directly.

This was also reported here #4777 and here #5107

[AsifAliJohari]

Sorry for the late reply. But file copy to that path where i want to copy means in my backup directory .. i open it in realm studio. so why it crash? if its problem of android, file should not be copy in my output path . scope storage issue . given code you can use to reproduce crash .

…

On Mon, Nov 14, 2022, 10:26 PM Christian Melchior ***@***.***> wrote: @AsifAliJohari <https://github.com/AsifAliJohari> It looks like you are hitting the new security restrictions introduced in Android 11 which require you to use the Scoped Storage API's: https://developer.android.com/about/versions/11/privacy/storage These API's prevent Realm from opening and using Realm files on external storage directly. This was also reported here #4777 <#4777> and here #5107 <#5107> — Reply to this email directly, view it on GitHub <#6028 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AGOLAQZQ3NQO4WST7RLKCPDWIJY2HANCNFSM6AAAAAAR6GDWRI> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[jedelbo]

It seems like there is little we can do to solve this. @AsifAliJohari not sure why you closed and reopened. Do you have further questions before we close this issue?

[AsifAliJohari]

No, it doesn't.

…

On Wed, Nov 23, 2022, 9:25 PM Jørgen Edelbo ***@***.***> wrote: It seems like there is little we can do to solve this. @AsifAliJohari <https://github.com/AsifAliJohari> not sure why you closed and reopened. Do you have further questions before we close this issue? — Reply to this email directly, view it on GitHub <#6028 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AGOLAQZKJLKGUNBIQR2B5PTWJZAO3ANCNFSM6AAAAAAR6GDWRI> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[AsifAliJohari]

I first copy to cashe dir , then copy to Android/media directory. yes , you need to work on it . Actually, I closed it , mistakenly it reopen .it smilar to other above mention issue. seniaro diff .

…

On Thu, Nov 24, 2022, 10:58 AM Asif Johari ***@***.***> wrote: No, it doesn't. On Wed, Nov 23, 2022, 9:25 PM Jørgen Edelbo ***@***.***> wrote: > It seems like there is little we can do to solve this. @AsifAliJohari > <https://github.com/AsifAliJohari> not sure why you closed and reopened. > Do you have further questions before we close this issue? > > — > Reply to this email directly, view it on GitHub > <#6028 (comment)>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/AGOLAQZKJLKGUNBIQR2B5PTWJZAO3ANCNFSM6AAAAAAR6GDWRI> > . > You are receiving this because you were mentioned.Message ID: > ***@***.***> >

[jedelbo]

Ok, I will then close this issue. You can open another, if you have a different problem.