Couchbase Custom Reduce behaving inconsistently

Question

I am using couchbase version 2.0.1 - enterprise edition (build-170) and java-client version 1.2.2
I have a custom reduce function to get last activity of a user
The response from java client is inconsistent At time I get correct response and most of the time I get null value against valid keys. Even Stale.FALSE doesn't help !!

Number of records in view is around 1 millon and result set for query is arounk 1K key value pairs. I am not sure what could be the issue here.. It will be great if someone can help.

Reduce Function is as below:

function (key, values, rereduce) {
    var currDate = 0;
    var activity = "";
    for(var idx in values){
        if(currDate < values[idx][0]){
            currDate = values[idx][0];
            activity = values[idx][1];
        }
    }
    return [currDate, activity];
}

View Query:

CouchbaseClient cbc = Couchbase.getConnection();
Query query = new Query();
query.setIncludeDocs(false);
query.setSkip(0);
query.setLimit(10000);
query.setReduce(true);
query.setGroupLevel(4);
query.setRange(startKey,endKey);
View view = cbc.getView(document, view);
ViewResponse response = cbc.query(view, query);

Answer 1

Looks like There was some compatibility issue with java-client 1.2.2 and google gson 1.7.1 which was being used in my application.

I switched to java-client 1.2.3 and google gson 2.2.4. Things are working as great now.