realm-core: Bad Realm file header (#3)

One of realm-java user gets crashes with below backtrace

Fatal Exception: io.realm.exceptions.RealmFileException: Unable to open a realm at path '/data/data/com.xxx.android/files/xxxxx.realm': Bad Realm file header (#3). in /Users/cm/Realm/realm-java/realm/realm-library/src/main/cpp/io_realm_internal_SharedRealm.cpp line 81
       at io.realm.internal.SharedRealm.nativeGetSharedRealm(SharedRealm.java)
       at io.realm.internal.SharedRealm.getInstance(SharedRealm.java:178)
       at io.realm.internal.SharedRealm.getInstance(SharedRealm.java:155)
       at io.realm.RealmCache.createRealmOrGetFromCache(RealmCache.java:124)
       at io.realm.Realm.getInstance(Realm.java:228)

It happens to Android 6.0,4.4.4,5.0.2. It cannot be reproducible from user side right now. around 0.05% users met this issue.

About this issue

Original URL
State: closed
Created 8 years ago
Comments: 47 (22 by maintainers)

Most upvoted comments

If the header is never overwritten, is it possible that the “header reader” return a false error while checking if it is a realm file ?

That seems highly unlikely. But I suggest we log what in the header is considered wrong, and possibly the whole header so we can see if it’s been completely overwritten in some way. (Tracking here: https://github.com/realm/realm-core/issues/3075)

bmunkholm on Jul 11, 2018

I have updated to 5.0.0 and the issue still exists. Is there a workaround?

ptsiogas on Mar 29, 2018

@ironage No realm file is not encrypted.

mihirjoshi21 on Jan 12, 2017