PUT test01
{
  "mappings": {
    "properties": {
      "dadate": {
        "type": "date",
        "ignore_malformed": true
      }
    }
  }
}
     
PUT test01/_doc/1
{
  "dadate": "-522000000"
}

Caused by: java.lang.ArithmeticException: long overflow
	at java.lang.Math.multiplyExact(Math.java:946) ~[?:?]
	at java.lang.Math.multiplyExact(Math.java:922) ~[?:?]
	at java.time.Instant.toEpochMilli(Instant.java:1236) ~[?:?]
	at org.elasticsearch.index.mapper.DateFieldMapper$Resolution$1.convert(DateFieldMapper.java:83) ~[elasticsearch-7.6.0.jar:7.6.0]
	at org.elasticsearch.index.mapper.DateFieldMapper$DateFieldType.parse(DateFieldMapper.java:338) ~[elasticsearch-7.6.0.jar:7.6.0]
	at org.elasticsearch.index.mapper.DateFieldMapper.parseCreateField(DateFieldMapper.java:545) ~[elasticsearch-7.6.0.jar:7.6.0]