SQLiteReadOnlyDatabaseException: attempt to write a readonly database (code 1032)

Question

So in some rare instances, I\'m seeing the \"attempt to write a readonly database\" message, and I can\'t figure out where the problem lies. I\'ll start with the stacktrace

Answer 1

So the root cause of this, at first glance, appears that a third party library. Unless I'm mistaken, Tagit by Mobeix is deleting the database at app startup. I added some detailed SQLite logging, including these policies:

StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
    .detectLeakedSqlLiteObjects()
    .detectLeakedClosableObjects()
    .penaltyLog()
    .penaltyDeath()
    .build());

I noticed in the log that my database is being unlinked after I create and open it. More detailed logging indicates it occurs when the Mobeix library is being initialized. The offending line in question:

01-29 13:47:49.118: W/SQLiteLog(12120): (28) file unlinked while open: /data/user/0/com.company.app/databases/MyDatabase.db

So my database file is unlinked. Weird. The next call to getWritableDatabase() recreates it again and then it's fine until the app is killed and re-launched, at which point it gets deleted and recreated.

I'll update this if I ever figure out exactly what's causing the unlink.