Elasticsearch fails silently if document has mapping mismatch for a field

Question

I am facing a weird issue with Elasticsearch. My mapping specifies that a certain field is of type long. Now accidentally I was trying to index some documents which

Answer 1

I suspect your mapping looks similar to this:

{
    "long_field": {
        "type": "long"
    }
}

If that's the case, you can set the coerce flag to false as it is true by default and will always try to convert strings to numbers and truncate fractions for integers.

{
    "long_field": {
        "type": "long",
        "coerce": false
    }
}

If you do this, the next time you try to index a long field as a string, ES will tell you this:

MapperParsingException[failed to parse [long_field]]; nested: IllegalArgumentException[Long value passed as String];