objectbox-java: Native Crash when querying first - Only showing at PlayStore

Issue Basics

• ObjectBox version: 2.3.4 and 2.5.1 - Upgraded version to see if still happens
• Reproducibility: Always on following devices (caught on playstore): Samsung Galaxy S9+ (star2qltechn), 5632MB RAM, Android 10 Motorola moto g(7) (river), 3584MB RAM, Android 9 Motorola motorola one vision (kane_sprout), 3840MB RAM, Android 10 Motorola Moto X (4) (payton), 2816MB RAM, Android 9 Redmi Redmi Note 8 (ginkgo), 3840MB RAM, Android 9 Samsung Galaxy A30s (a30s), 3840MB RAM, Android 10

-Never on debug builds or release builds that I generated for my team to test it, and never happened, even on same devices like Samgung Galaxy S9 and a Motorola Moto G7 which some member also have.

It seems that it’s only happening on Android 9 and 10 (which I also tested here and wasn’t able to reproduce)

Reproducing the bug

Description

I’m getting the following native crash log (that I can only get by PlayStore, not Crashlytics) as soon as my app starts, since I request data from local database: The only line that showed me some info was:

#06 pc 0000000000043688 /data/app/br.com.ampli-A-oKgSqV0pfD7IL5xQWvwQ==/base.apk!libobjectbox-jni.so (offset 0x37e000) (Java_io_objectbox_query_Query_nativeFindFirst+68)

It started out of nowhere, I was working just fine on my app version “1.0.2” when I upgraded to “1.1.0” it stopped working. I didn’t change any property on any Entity. First I thought was an extension function queryFirst that I use:

inline fun <reified T : Any> BoxStore.queryFirst(model: T): T? {
    return this.boxFor(model::class.java).query().build().findFirst()
}

So I’ve change all call on it to the default : BoxStore.getDefault().boxFor(Course::class.java).query().build().findFirst()

Maybe related to (https://github.com/objectbox/objectbox-java/issues/494) or (https://github.com/objectbox/objectbox-java/issues/490)

Code

I’m not entirely sure what code exactly is causing this, but I think is when I get the first Course object:

  override suspend fun fetchCourse(): Course? {
        return withContext(Dispatchers.IO) {
            BoxStore.getDefault().boxFor(Course::class.java).query().build().findFirst()
        }
    }

Logs & stackstraces

pid: 0, tid: 0 >>> br.com.ampli <<<

backtrace:
  #00  pc 0000000000083134  /apex/com.android.runtime/lib64/bionic/libc.so (abort+160)
  #01  pc 00000000004b3c08  /apex/com.android.runtime/lib64/libart.so (art::Runtime::Abort(char const*)+2376)
  #02  pc 000000000000c5b4  /system/lib64/libbase.so (android::base::LogMessage::~LogMessage()+608)
  #03  pc 0000000000374a94  /apex/com.android.runtime/lib64/libart.so (art::JavaVMExt::JniAbort(char const*, char const*)+1592)
  #04  pc 00000000003a74c8  /apex/com.android.runtime/lib64/libart.so (art::JNI::SetObjectField(_JNIEnv*, _jobject*, _jfieldID*, _jobject*)+924)
  #05  pc 00000000000262a4  /data/app/br.com.ampli-A-oKgSqV0pfD7IL5xQWvwQ==/base.apk!libobjectbox-jni.so (offset 0x37e000)
  #06  pc 0000000000043688  /data/app/br.com.ampli-A-oKgSqV0pfD7IL5xQWvwQ==/base.apk!libobjectbox-jni.so (offset 0x37e000) (Java_io_objectbox_query_Query_nativeFindFirst+68)
  #07  pc 000000000003fb7c  /data/app/br.com.ampli-A-oKgSqV0pfD7IL5xQWvwQ==/oat/arm64/base.odex (art_jni_trampoline+140)
  #08  pc 0000000000137334  /apex/com.android.runtime/lib64/libart.so (art_quick_invoke_stub+548)
  #09  pc 000000000014606c  /apex/com.android.runtime/lib64/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+244)
  #10  pc 00000000002e0cd0  /apex/com.android.runtime/lib64/libart.so (art::interpreter::ArtInterpreterToCompiledCodeBridge(art::Thread*, art::ArtMethod*, art::ShadowFrame*, unsigned short, art::JValue*)+384)
  #11  pc 00000000002dbfb0  /apex/com.android.runtime/lib64/libart.so (bool art::interpreter::DoCall<false, false>(art::ArtMethod*, art::Thread*, art::ShadowFrame&, art::Instruction const*, unsigned short, art::JValue*)+912)
  #12  pc 00000000005a030c  /apex/com.android.runtime/lib64/libart.so (MterpInvokeVirtualQuick+596)
  #13  pc 0000000000135594  /apex/com.android.runtime/lib64/libart.so (mterp_op_invoke_virtual_quick+20)
  #14  pc 000000000047941c  /data/app/br.com.ampli-A-oKgSqV0pfD7IL5xQWvwQ==/oat/arm64/base.vdex (io.objectbox.query.Query$a.call+28)
  #15  pc 000000000059bbe4  /apex/com.android.runtime/lib64/libart.so (MterpInvokeInterface+1740)
  #16  pc 0000000000131a14  /apex/com.android.runtime/lib64/libart.so (mterp_op_invoke_interface+20)
  #17  pc 0000000000476786  /data/app/br.com.ampli-A-oKgSqV0pfD7IL5xQWvwQ==/oat/arm64/base.vdex (io.objectbox.BoxStore.a+42)
  #18  pc 00000000005a0610  /apex/com.android.runtime/lib64/libart.so (MterpInvokeVirtualQuick+1368)
  #19  pc 0000000000135594  /apex/com.android.runtime/lib64/libart.so (mterp_op_invoke_virtual_quick+20)
  #20  pc 0000000000476886  /data/app/br.com.ampli-A-oKgSqV0pfD7IL5xQWvwQ==/oat/arm64/base.vdex (io.objectbox.BoxStore.a+6)
  #21  pc 00000000005a0610  /apex/com.android.runtime/lib64/libart.so (MterpInvokeVirtualQuick+1368)
  #22  pc 0000000000135594  /apex/com.android.runtime/lib64/libart.so (mterp_op_invoke_virtual_quick+20)
  #23  pc 0000000000479a40  /data/app/br.com.ampli-A-oKgSqV0pfD7IL5xQWvwQ==/oat/arm64/base.vdex (io.objectbox.query.Query.d+40)
  #24  pc 00000000005a0610  /apex/com.android.runtime/lib64/libart.so (MterpInvokeVirtualQuick+1368)
  #25  pc 0000000000135594  /apex/com.android.runtime/lib64/libart.so (mterp_op_invoke_virtual_quick+20)
  #26  pc 00000000002442c6  /data/app/br.com.ampli-A-oKgSqV0pfD7IL5xQWvwQ==/oat/arm64/base.vdex (e.a.a.j1.d.a$a.d+54)
  #27  pc 00000000005a0610  /apex/com.android.runtime/lib64/libart.so (MterpInvokeVirtualQuick+1368)
  #28  pc 0000000000135594  /apex/com.android.runtime/lib64/libart.so (mterp_op_invoke_virtual_quick+20)
  #29  pc 000000000047fe9a  /data/app/br.com.ampli-A-oKgSqV0pfD7IL5xQWvwQ==/oat/arm64/base.vdex (b1.p.i.a.a.c+18)
  #30  pc 000000000059bbe4  /apex/com.android.runtime/lib64/libart.so (MterpInvokeInterface+1740)
  #31  pc 0000000000131a14  /apex/com.android.runtime/lib64/libart.so (mterp_op_invoke_interface+20)
  #32  pc 000000000048797e  /data/app/br.com.ampli-A-oKgSqV0pfD7IL5xQWvwQ==/oat/arm64/base.vdex (a0.a.p0.run+214)
  #33  pc 000000000059bbe4  /apex/com.android.runtime/lib64/libart.so (MterpInvokeInterface+1740)
  #34  pc 0000000000131a14  /apex/com.android.runtime/lib64/libart.so (mterp_op_invoke_interface+20)
  #35  pc 000000000048fcd4  /data/app/br.com.ampli-A-oKgSqV0pfD7IL5xQWvwQ==/oat/arm64/base.vdex (a0.a.c2.b.a)
  #36  pc 00000000005a0610  /apex/com.android.runtime/lib64/libart.so (MterpInvokeVirtualQuick+1368)
  #37  pc 0000000000135594  /apex/com.android.runtime/lib64/libart.so (mterp_op_invoke_virtual_quick+20)
  #38  pc 000000000048ee5e  /data/app/br.com.ampli-A-oKgSqV0pfD7IL5xQWvwQ==/oat/arm64/base.vdex (a0.a.c2.b$a.run+534)
  #39  pc 00000000002b191c  /apex/com.android.runtime/lib64/libart.so (art::interpreter::Execute(art::Thread*, art::CodeItemDataAccessor const&, art::ShadowFrame&, art::JValue, bool, bool) (.llvm.18252570399552585066)+240)
  #40  pc 000000000058b6e8  /apex/com.android.runtime/lib64/libart.so (artQuickToInterpreterBridge+1012)
  #41  pc 0000000000140468  /apex/com.android.runtime/lib64/libart.so (art_quick_to_interpreter_bridge+88)
  #42  pc 0000000000137334  /apex/com.android.runtime/lib64/libart.so (art_quick_invoke_stub+548)
  #43  pc 000000000014606c  /apex/com.android.runtime/lib64/libart.so (art::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)+244)
  #44  pc 00000000004ab72c  /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::InvokeWithArgArray(art::ScopedObjectAccessAlreadyRunnable const&, art::ArtMethod*, art::(anonymous namespace)::ArgArray*, art::JValue*, char const*)+104)
  #45  pc 00000000004ac7c0  /apex/com.android.runtime/lib64/libart.so (art::InvokeVirtualOrInterfaceWithJValues(art::ScopedObjectAccessAlreadyRunnable const&, _jobject*, _jmethodID*, jvalue const*)+416)
  #46  pc 00000000004ecb00  /apex/com.android.runtime/lib64/libart.so (art::Thread::CreateCallback(void*)+1176)
  #47  pc 00000000000e28c0  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+36)
  #48  pc 000000000008503c  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64)

Entities

But I can’t be sure what entity is causing the issue. But I think is my following Course entity:

@Entity
data class Course(

    @Id var boxId: Long = 0L,

    @Index var id: String = UUID.randomUUID().toString(),

    var version: Int = 0,

    var name: String = "",

    var studentId: String = "",

    var percentageCompletion: Int = 0,

    var startDateInEpochDay: Long = 0L,

    var endDateInEpochDay: Long = 0L
) {
    var disciplines: ToMany<Discipline> = ToMany(this, Course_.disciplines)
}

Btw in case someone’s wondering why disciplines is not a lateinit var, is because couldn’t unit test it if it was, so I changed and initialized here, for more info: ToOneObjectIsNull

Misc

*Is there anything special about your app? The only “big” change that I’ve made from working version to not working version was adding and upgrading another lib, specifically Zendesk’s I went from

3.0.1 to 4.0.0

And also added 2 more libs:

com.zendesk:chat:2.0.0 com.zendesk:messaging:4.2.1

May transactions or multi-threading play a role? I’m using coroutines with Dispatchers.IO as a context whenever I call the database

Did you find any workarounds to prevent the issue?* I’ll try to change every findFirst() call to find and get the first position to see if I’m able to make it work., but I’m running out of ideas.