ArrayOutOfBoundsException when using Field.getName

[kaeawc]

During initialization the SDK users some reflection here

I've observed a couple occurrences where this can result in an ArrayOutOfBoundsException. I have very little insight or understanding of the internals of Art, but it seems like it could be safe to catch that exception as well.

Here's the stacktrace from an app using Mixpanel SDK 4.6.1

java.lang.RuntimeException: Unable to create application <redacted>: java.lang.ArrayIndexOutOfBoundsException: length=15; index=56585
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4720)
at android.app.ActivityThread.access$1600(ActivityThread.java:163)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1419)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5536)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1397)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1192)
Caused by: java.lang.ArrayIndexOutOfBoundsException: length=15; index=56585
at java.lang.reflect.ArtField.getNameNative(Native Method)
at java.lang.reflect.ArtField.getName(ArtField.java:91)
at java.lang.reflect.Field.getName(Field.java:122)
at com.mixpanel.android.mpmetrics.ResourceReader.readClassIds(ResourceReader.java:89)
at com.mixpanel.android.mpmetrics.ResourceReader.initialize(ResourceReader.java:120)
at com.mixpanel.android.mpmetrics.ResourceReader$Ids.<init>(ResourceReader.java:23)
at com.mixpanel.android.viewcrawler.ViewCrawler$ViewCrawlerHandler.<init>(ViewCrawler.java:283)
at com.mixpanel.android.viewcrawler.ViewCrawler.<init>(ViewCrawler.java:78)
at com.mixpanel.android.mpmetrics.MixpanelAPI.constructUpdatesFromMixpanel(MixpanelAPI.java:1330)
at com.mixpanel.android.mpmetrics.MixpanelAPI.<init>(MixpanelAPI.java:218)
at com.mixpanel.android.mpmetrics.MixpanelAPI.getInstance(MixpanelAPI.java:288)

[sandy-8925]

Some of our users also face the same issue, with the same stacktrace as above (Mixpanel version 4.5.3)

java.lang.ArrayIndexOutOfBoundsException: length=0; index=67894
1   at java.lang.reflect.ArtField.getNameNative(Native Method)
2   at java.lang.reflect.ArtField.getName(ArtField.java:91)
3   at java.lang.reflect.Field.getName(Field.java:122)
4   at com.mixpanel.android.mpmetrics.ResourceReader.readClassIds(ResourceReader.java:85)
5   at com.mixpanel.android.mpmetrics.ResourceReader.initialize(ResourceReader.java:116)
6   at com.mixpanel.android.mpmetrics.ResourceReader$Ids.<init>(ResourceReader.java:19)
7   at com.mixpanel.android.viewcrawler.ViewCrawler.<init>(ViewCrawler.java:66)
8   at com.mixpanel.android.mpmetrics.MixpanelAPI.constructUpdatesFromMixpanel(MixpanelAPI.java:1094)
9   at com.mixpanel.android.mpmetrics.MixpanelAPI.<init>(MixpanelAPI.java:147)
10  at com.mixpanel.android.mpmetrics.MixpanelAPI.getInstance(MixpanelAPI.java:211)

[fcduarte]

Here's another one, from 4.6.4:

java.lang.RuntimeException: Unable to start receiver com.a.b.c.d.e: java.lang.ArrayIndexOutOfBoundsException: length=14; index=31289
        at android.app.ActivityThread.handleReceiver(ActivityThread.java:3487)
        at android.app.ActivityThread.access$1900(ActivityThread.java:198)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1753)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:145)
        at android.app.ActivityThread.main(ActivityThread.java:6838)
        at java.lang.reflect.Method.invoke(Method.java:-2)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
Caused by: java.lang.ArrayIndexOutOfBoundsException: length=14; index=31289
        at java.lang.reflect.ArtField.getNameNative(ArtField.java:-2)
        at java.lang.reflect.ArtField.getName(ArtField.java:91)
        at java.lang.reflect.Field.getName(Field.java:122)
        at com.mixpanel.android.mpmetrics.ResourceReader.readClassIds(SourceFile:89)
        at com.mixpanel.android.mpmetrics.ResourceReader.initialize(SourceFile:120)
        at com.mixpanel.android.mpmetrics.ResourceReader$Ids.<init>(SourceFile:23)
        at com.mixpanel.android.viewcrawler.ViewCrawler$ViewCrawlerHandler.<init>(SourceFile:264)
        at com.mixpanel.android.viewcrawler.ViewCrawler.<init>(SourceFile:74)
        at com.mixpanel.android.mpmetrics.MixpanelAPI.constructUpdatesFromMixpanel(SourceFile:1331)
        at com.mixpanel.android.mpmetrics.MixpanelAPI.<init>(SourceFile:219)
        at com.mixpanel.android.mpmetrics.MixpanelAPI.getInstance(SourceFile:289)

If it's worth to mention it happened on a 5.1.1 device, Samsung SM-G360T

The bug has been here for a year, any plans to fix it?

[Smbat888]

hi all,

any plans to fix this? this bug even hasn't assigned to someone!
can you please fix this? there are many issues that our users always faced!

[patedit]

Hi folks, this is a system crash and not caused by the library, so we can't recover from it. I've added a try/catch so the app doesn't crash in the future

[patedit]

Available on v5.6.7