mozilla-services/android-sync — comment on commit bffd6d8649e0198a25a708001e261e86f3525001
File: src/main/java/org/mozilla/gecko/sync/synchronizer/ConcurrentRecordConsumer.java line 147
By rnewman:

We generally take the view that it's better to have 90% of your items apply, and track the failures, than abort.

We don't have failure tracking yet (Bug 709371), so for now this just logs and continues.