crash happened while build a new boxstore.

[Oo121oO]

a native crash was found here. code bellow:

MyObjectBox.builder().name(name)
.androidContext(context.getApplicationContext())
.build();

all crashed mobile phone info is more or less like these:
until now there were 40 mobile phones crashed.

1. Operating system: Android
   0.0.0 Linux 4.1.18-g455cb5e RxJava2 support #1 SMP PREEMPT Tue Jan 16 03:34:55 CST 2018 armv7l

2. CPU: arm
   ARMv1 ARM part(0x4100d030) features: half,thumb,fastmult,vfpv2,edsp,neon,vfpv3,tls,vfpv4,idiva,idivt
   8 CPUs

3. Android 7.0+

Native crash stack is here:

Thread 77 (crashed)
crashed thread info start
frame_count = 680
0 libc.so + 0x4a680 (tgkill+0x0000000c)
r0 = 0x00000000 r1 = 0x00004691 r2 = 0x00000006 r3 = 0x00000008
r4 = 0xc57ce978 r5 = 0x00000006 r6 = 0xc57ce920 r7 = 0x0000010c
r8 = 0x00000001 r9 = 0xffffffff r10 = 0x00000000 r12 = 0x00000011
fp = 0xffffffff sp = 0xc57cc7c8 lr = 0xee7b2e17 pc = 0xee7b5680
Found by: given as instruction pointer in context
1 libc.so + 0x1d8b7 (raise+0x0000000c)
sp = 0xc57cc7e0 pc = 0xee7888b9
Found by: stack scanning
2 libc.so + 0x19403 (__atomic_inc+0x0000003e)
sp = 0xc57cc7e8 pc = 0xee784405
Found by: stack scanning
3 libc.so + 0x4f541 (__swrite+0x0000004a)
sp = 0xc57cc7f8 pc = 0xee7ba543
Found by: stack scanning
4 libobjectbox.so + 0x10d21a
sp = 0xc57cc804 pc = 0xc008621c
Found by: stack scanning
5 libc.so + 0x170e6 (abort+0x00000006)
sp = 0xc57cc810 pc = 0xee7820e8
Found by: stack scanning
6 libc.so + 0x1b8b5 (__libc_current_sigrtmin+0x000009f8)
sp = 0xc57cc818 pc = 0xee7868b7
Found by: stack scanning
...

one more thing is that our abi is only support armabi-v7, is there any matter with this?

if you need more details, please contact me.

[greenrobot]

We would need more info, e.g. do you use multi process? Is there any pattern visible about the devices (e.g. single OS, specific Brands, only ARM 32 bit, etc.). Is there a crash message e.g. SIGSEGV? Etc.

Also, how much percent are 40 device? If you are in the millions, it might be a tiny percentage.

[Oo121oO]

Our App is using multi process, but Objectbox access is only on main process.

The mobile Brands list bellow:
Xiaomi MIX 2, Xiaomi MI 6, ZUK Z2131, VIVO X9L, Meizu M5 Note, OnePlus A5000, Samsung G9208, HUAWEI BLN-AL40, HUAWEI NXT-AL10, HUAWEI PRA-AL00X, etc

All crash message is SIGABRT.

of-cause our App DAU is more than 20, 000, and this crash is 3.5% of all crash percentage.

This might be help.

[thread RxCachedThreadScheduler-1, id 8288]
io.objectbox.BoxStore.nativeCreate(Native Method)
io.objectbox.BoxStore.(BoxStore.java:194)
io.objectbox.b.a(BoxStoreBuilder.java:308)
com.duowan.minivideo.objectbox.ObjectboxServiceImpl.c(ObjectboxServiceImpl.java:80)
com.duowan.minivideo.objectbox.ObjectboxServiceImpl.a(ObjectboxServiceImpl.java:50)
com.duowan.minivideo.objectbox.c.accept(Unknown Source)
...

[greenrobot]

Our App is using multi process, but Objectbox access is only on main process.

Are you sure ObjectBox is not even created in other processes? This has been a problem before in another app.

[Oo121oO]

I'm pretty sure that. Because before we use Objectbox, we have check if it is on main process. If NOT, return or throw an Exception.

And I really know that Objectbox does not support multi process. I check this with yours.

[greenrobot-team]

Closing this issue due to inactivity. 💤 Please re-open with more details or submit a new issue.