I know this looks very confusing and I hope I haven't overdone it with the examples but this seems like a rather serious problem with the HBase integration. Values from previous rows are "leaking" into null values in following rows. We're not 100% sure if we're doing something wrong but I don't see what we could do wrong here. I'll open an issue if no one has an idea what's going on here. Tried looking at the HBase Handler code but was confused by it. Will try again tomorrow.