failed to parse timestamp elasticsearch - elasticsearch

Question

I'm new to elasticsearch and am trying to create my first index but am having issues with a timestamp field that was working before...
I created my index like this:
PUT /kafkasdp
{
"mappings": {
"kafka_logs": {
"properties": {
"timestamp": {
"type": "date"
},
"log_level": {
"type": "string"
},
"message1": {
"type": "string"
},
"message2": {
"type": "string"
}
}
}
}
}
and then I'm trying to send data like this:
post /kafkasdp/kafka_logs
{
"timestamp": "2017-02-03 19:27:20,606",
"log_level": "INFO",
"message2": "Deleting segment 1 from log omega-replica-sync-dev-8. (kafka.log.Log)"
}
but keep getting this error:
{
"error": {
"root_cause": [
{
"type": "mapper_parsing_exception",
"reason": "failed to parse [timestamp]"
}
],
"type": "mapper_parsing_exception",
"reason": "failed to parse [timestamp]",
"caused_by": {
"type": "illegal_argument_exception",
"reason": "Invalid format: \"2017-02-03 19:27:20,606\" is malformed at \" 19:27:20,606\""
}
},
"status": 400
}
I thought my timestamp is a valid date type?

Answer 1

Read about date type on Elasticsearch reference: you should specify format of date you are expecting in your documents:
PUT your_index_name
{
"mappings": {
"your_index_type": {
"properties": {
"date": {
"type": "date",
"format": "yyyy-MM-dd HH:mm:ss,SSS"
}
}
}
}
}
As you did not specify it, Elasticsearch will expect date value in ISO format:
yyyyMMdd'T'HHmmss.SSS'Z' (e.g., 2017-02-03T19:27:20.606Z)