mongodb 2.2.0 and mongo-java-driver 2.9.2

[Rick Chen]

Hello,

I have a 2.0 mongo with 2.9.2 driver dev environment that works flawlessly.

On my production server with mongodb 2.2.0 and mongo-java-driver 2.9.2, all the writes seemed as if it's WriteConcern of 0. They writes and reads were out of sync, I was getting errors on my application.

Please advise.

[Rick Chen]

I think we narrow it down to getLastError with a null value on WriteConcern.

We have @Version on our collection and it seems like it's returning the wrong count here:

      if (res.getUpdatedCount() != 1)

   throw new ConcurrentModificationException(....)