bulk action could not parse the date format corrrectly

I have some doc, when I save them one by one,it’s well.

but when I add them to bulk,it shows:

[2018-08-07T20:25:31,827][DEBUG][o.e.a.b.TransportShardBulkAction] [eos_daily_user_statistic][0] failed to execute bulk item (index) BulkShardRequest [[eos_daily_user_statistic][0]] containing [index {[eos_daily_user_statistic][doc][b1_cryptocurrency_contract_RAM-EOS_2018-06-09], source[{"updateTimestamp": "20180609'T'115800.000Z", "turnoverIn": 1192.0, "volumeIn": 8192.0, "code": "RAM-EOS", "volume": 8192.0, "securityId": "cryptocurrency_contract_RAM-EOS", "turnoverOut": 0.0, "userId": "b1", "turnover": 1192.0, "volumeOut": 0.0, "name": "RAM/EOS", "timestamp": "2018-06-09", "id": "b1_cryptocurrency_contract_RAM-EOS_2018-06-09"}]}]

'reason': 'Invalid format: "20180609\'T\'115800.000Z" is malformed at "0609\'T\'115800.000Z"'

I did not set special date format and just use the default,I check:

basic_date_time
A basic formatter that combines a basic date and time, separated by a T: yyyyMMdd'T'HHmmss.SSSZ.

It seems the bulk action behavior is different comparing to one doc saving.

[foolcage]

In fact it’s 20180609’T’121600.000Z ,the 2018-06-09T12:16:00+00:00 is got from es after saving.

Anyway I set the format in Date now, so what exactly the format string should be: I try

format="yyyyMMdd'T'HHmmss.SSS||yyyy-MM-dd||epoch_millis"

the mapping could be saved well,it works just in single doc saving not bulks.

format="yyyyMMddTHHmmss.SSS||yyyy-MM-dd||epoch_millis"

the mapping could not be saved.

After all,I set

timestamp = Date(format="yyyyMMdd HHmmss.SSS||yyyy-MM-dd||epoch_millis")

And just put “20180609 121600.000”,it works both single doc saving or bulks.

So what exactly the basic_date_time should be? just using the string ‘basic_date_time’ but not the format pattern?

[honzakral]

the basic_date_time is a just a label for the underlying format so it should be literally the same as specifying yyyyMMdd'T'HHmmss.SSSZ