I am trying to use map-reduce on CouchBase Lite. I have documents and they are being channelised. All doucments what I want are coming to Couchbase Lite. But When I Try to run map-reduce on them I am getting the following error
com.couchbase.lite.CouchbaseLiteException: Error when calling map block of view 'calendar', Status: 593 (HTTP 500 Application callback block failed)
Below is my map reduce function
private View createView(Database database){
View calendarView = database.getView("calendar");
calendarView.setMap(new Mapper() {
@Override
public void map(Map<String, Object> document, Emitter emitter) {
emitter.emit((long) document.get("date"),(long) document.get("cost"));
}
},"2");
return calendarView;
}
and Below is the part of main where I am calling the view and querying over it
View calendarView = createView(database);
Query query = database.getView("calendar").createQuery();
query.setStartKey(1472467249448l);
query.setEndKey(1472553649449l);
QueryEnumerator result = null;
try {
result = query.run();
} catch (CouchbaseLiteException e) {
e.printStackTrace();
}
for (Iterator<QueryRow> it = result; it.hasNext(); ) {
QueryRow row = it.next();
Log.d(TAG, row.getValue().toString());
}
As borrrden said in a comment above, Application callback block failed means your map function threw an exception. Use a debugger to find out what it is.
A likely possibility is that one of the documents in your database does not have a date property. In that case your map function would be passing null to the first (key) parameter of emit, which is an invalid argument.