Corrupt Revision Data error when saving documents

Mobile
1

SDK: Couchbase Lite C
Version: 3.0.2
OS: iOS & Android
Error: kCBLErrorCorruptRevisionData

This error has only been observed through error reports from user devices, and I have not been able to replicate it.

It seems that saving a document can sometimes corrupt it, since after the first time this error has been returned when saving a document, subsequent attempts to save the document always fail with the same error. The document can still be purged, though.

There are also crashes in CBLDatabase_SaveDocumentWithConcurrencyControl and CBLDocument::properties that seem related. It would make sense to me that once a document has been corrupted, invariants that certain code relies on don’t hold anymore.

The error message only contains the error code. Looking at the source code, only in a few places is a corruptRevisionData error thrown without a message. Additional logging or an error message describing the problem might be the first step to diagnose the issue.

2

To solve this issue, we will need to be able to reproduce the issue or know the sequence of events that lead to the issue. I agreed that adding error message along with the error code would be the first step.

3

Do you have a log that you can share?

4

I don’t have full log files, just log messages of log level info and above. But I might be able to capture and provide a database with a corrupted document in it. That would allow replication of the error.

5

That could be helpful at least to see what rev info is missing.

6

I can see that the issue has been addressed and fixed in CBL-3836. I’m not sure what the fix version “Beryllium” means. Would you be able to tell me in what release/build of Couchbase Lite that this fix will be available? Thank you!

7

The fix is definitely in 3.1.0 and up.