Kamal questions

Kamal answers

• Elasticsearch aggregation with hierarchical category, subcategory; limit the levels
• How to use ingest pipelines on already indexed documents?
• Is it possible to sort by a range in Elasticsearch?
• Elasticsearch - Count duplicated and unique values
• How does MapReduce recover from errors if failure happens in an intermediate stage
• Is synchronized locking a Reentrantlock, or only its object?
• Elasticsearch: Can it be used to avoid writing your own NLP? (e.g. Re-invent the wheel)
• Elasticsearch field name aliasing
• ElasticSearch - Delete documents by specific field
• elasticsearch-rest-high-level-client vs elasticsearch-rest-client