Second fraction into timesamp [Apache errorlog timestamp]

Elastic Stack Logstash
1

Error:
value=>"Tue Mar 08 10:51:38.971058 2016" is malformed at ".971058 2016"", :config_parsers=>"EEE MMM dd HH:mm:ss yyyy"

I am trying to pass Aapache error log into logstash with timestamp being log time rather than parsing time.

something like:
date {
match => [ "timestamp", "EEE MMM dd HH:mm:ss yyyy", "EEE MMM dd HH:mm:ss.SSS yyyy", "EEE MMM dd HH:mm:ss.SS yyyy" ]
target => "@timestamp"
}

Can anyone guide me what is the value that can be used for those fractions after second in example above "38.971058"?

2

Since you have microseconds use SSSSSS instead of SSS. Note that ES won't store microsecond resolution.