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java.lang.ExceptionInInitializerError

casolorz

I have an Android app with the Dropbox Java api 3.0.5

For some reason some of my users get the exception I'm pasting below, but the majority do not. I've never reproduced the issue, I've only seen it reported on Crashlytics.

Does anyone have any idea what the issue could be? I use multidex on my app, is it maybe related to that?

Thank you.

Fatal Exception: java.lang.ExceptionInInitializerError
       at com.dropbox.core.DbxRequestUtil.buildUserAgentHeader(DbxRequestUtil.java:151)
       at com.dropbox.core.DbxRequestUtil.addUserAgentHeader(DbxRequestUtil.java:136)
       at com.dropbox.core.DbxRequestUtil.startPostRaw(DbxRequestUtil.java:233)
       at com.dropbox.core.v2.DbxRawClientV2$1.execute(DbxRawClientV2.java:107)
       at com.dropbox.core.v2.DbxRawClientV2.executeRetriable(DbxRawClientV2.java:284)
       at com.dropbox.core.v2.DbxRawClientV2.rpcStyle(DbxRawClientV2.java:102)
       at com.dropbox.core.v2.users.DbxUserUsersRequests.getCurrentAccount(DbxUserUsersRequests.java:120)
       at mypackage.UserDropbox.(UserDropbox.java)
       at mypackage.DropboxHelper$1.run(DropboxHelper.java)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
       at java.lang.Thread.run(Thread.java:818)
Caused by java.lang.NullPointerException: Attempt to invoke virtual method 'void java.util.jar.JarVerifier.removeMetaEntries()' on a null object reference
       at java.util.jar.JarFile.getInputStream(JarFile.java:381)
       at libcore.net.url.JarURLConnectionImpl.getInputStream(JarURLConnectionImpl.java:222)
       at java.net.URL.openStream(URL.java:470)
       at java.lang.ClassLoader.getResourceAsStream(ClassLoader.java:444)
       at java.lang.Class.getResourceAsStream(Class.java:1412)
       at com.dropbox.core.DbxSdkVersion.loadLineFromResource(DbxSdkVersion.java:34)
       at com.dropbox.core.DbxSdkVersion.loadVersion(DbxSdkVersion.java:56)
       at com.dropbox.core.DbxSdkVersion.(DbxSdkVersion.java)
       at com.dropbox.core.DbxRequestUtil.buildUserAgentHeader(DbxRequestUtil.java:151)
       at com.dropbox.core.DbxRequestUtil.addUserAgentHeader(DbxRequestUtil.java:136)
       at com.dropbox.core.DbxRequestUtil.startPostRaw(DbxRequestUtil.java:233)
       at com.dropbox.core.v2.DbxRawClientV2$1.execute(DbxRawClientV2.java:107)
       at com.dropbox.core.v2.DbxRawClientV2.executeRetriable(DbxRawClientV2.java:284)
       at com.dropbox.core.v2.DbxRawClientV2.rpcStyle(DbxRawClientV2.java:102)
       at com.dropbox.core.v2.users.DbxUserUsersRequests.getCurrentAccount(DbxUserUsersRequests.java:120)
       at mypackage.UserDropbox.(UserDropbox.java)
       at mypackage.DropboxHelper$1.run(DropboxHelper.java)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
       at java.lang.Thread.run(Thread.java:818)

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Comments

Greg-DB

[Cross-linking for reference: https://stackoverflow.com/questions/47537572/exception-while-dropbox-api-tries-to-read-a-resource-might-be-multidex-issue ]

I unfortunately have not seen this issue before. Do you know if it seems to be specific to any particular Android version, device, etc.?

casolorz

So far Android 5 and 6, seems to be on Motorola phones, Samsung phones, and some weird brand I've never head of. I only have this in beta so I don't have that many reports yet.

Greg-DB

Thanks! There doesn't seem to be a clear pattern in that unfortunately.

For reference, the Dropbox Java SDK contains a "sdk-version.txt" file with the version number for the SDK in it, for use in the User-Agent header string.

Based on the stack trace you shared, it appears the exception is occurring inside Java's getResourceAsStream, when the Dropbox SDK asks for an input stream for that "sdk-version.txt" file.

It's unclear why that may be happening, so I'll ask engineering to look into it.

casolorz

That is good to know. I'm wondering if my proguard is maybe renaming that or multidex is putting it on a second dex file and it is having issues getting it out there. I've had that happen before with multidex but only during the Application onCreate.

My proguard file has:

-keep class com.dropbox.** { *; }
-keepclassmembers class com.dropbox.** { *; }

Maybe I need to add something else to my multidex config to tell it to keep that file on the on the first dex file.