janmederly

### Describe the bug When performing _bulk update request while using text chunking processor I am getting `{"took":0,"ingest_took":1,"errors":true,"items":[{"index":{"_index":null,"_id":null,"status":500,"error":{"type":"null_pointer_exception","reason":"Cannot invoke \"Object.toString()\" because the return value of \"java.util.Map.get(Object)\" is null"}}}]}`. There is...