I have collection named "games" with rapidly changing content - documents are inserted every few seconds. Collection was TTL-indexed before with field "info.createtime".

Problem is that I constantly get this error with the collection:

Invalid BSONObj size: -286331154 (0xEEEEEEEE) first element: _id: ObjectId('50b5bafbae210be727000000')

I have discovered that it appears in regards of deleting documents while other clients trying to get some query results by that index. I tried to remove expireAfterSeconds attribute from index and do cron job removing expired items instead (with $atomic option), but the error remains the same.

I have struck into this problem, because the error exists on constant basis. Console command db.repairDatabase() fixes the problem but it reappears in next few hours.

After further discovering I was able to workaround this by calling reIndex() every time I remove expired items.

gamesCollection.remove( {'info.createtime': {$lt: hour_ago}, $atomic: 1}, {}, function() {
gamesCollection.reIndex(function(err, result) {});
});

The error didn't show anymore. But it is ugly way.

document example: http://pastebin.com/uFMrVfLR
db.games.getIndexes(): http://pastebin.com/Cz95ejK8
db.games.validate(): http://pastebin.com/BRfqp0kq