Using DATETIME_CONFIG=NONE with a DATETIME_CONFIG fails to extract dates

[khevans]

I'm having trouble parsing a log file that has a format similar to this format:

2019-07-08 14:03:59.335 INFO [Filename.java:91] Processing the following from Queue 
------------------------------------
Some text can go here

------------------------------------
2019-07-08 14:03:59.340 INFO [Filename.java:118] Received, will be ignored
2019-07-08 14:03:60.340 INFO [SomethingElse.java:118] Received, will be ignored

Note that it always starts with this date and can be several lines long.

I am currently trying this as my sourcetype in props.ini, but it does not extract the date:

SHOULD_LINEMERGE=true
LINE_BREAKER=([\r\n]+)
NO_BINARY_CHECK=true
BREAK_ONLY_BEFORE=\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d{3}\s[\w+\s\[\w\.]+(\:\d+)?\]
# \d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2} also fails
DATETIME_CONFIG=NONE
TIME_FORMAT=%Y-%m-%d %H:%M:%S
TIME_PREFIX=^

It gives me the "fails to parse timestamp, reverting to modtime" message and I don't know why. I am trying a sample of only 3 lines and each line matches that format but none of the dates extract. Why is this?

[Azeemering · Accepted solution]

This will work as a minimum. Make sure to include all 8 golden props.

[ your_sourcetype ]
SHOULD_LINEMERGE=true
LINE_BREAKER=([\n\s]*)\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}.\d{3}
NO_BINARY_CHECK=true
TIME_FORMAT=%Y-%m-%d %H:%M:%S.%3N
TIME_PREFIX=^
MAX_TIMESTAMP_LOOKAHEAD=23

You should always set the following 8:

TIME_PREFIX = regex of the text that leads up to the timestamp
MAX_TIMESTAMP_LOOKAHEAD = how many characters for the timestamp
TIME_FORMAT = strftime format of the timestamp
# for multiline events: SHOULD_LINEMERGE should always be set to false as LINE_BREAKER will speed up multiline events
SHOULD_LINEMERGE = false
# Wherever the LINE_BREAKER regex matches, Splunk considers the start
# of the first capturing group to be the end of the previous event
# and considers the end of the first capturing group to be the start of the next event.
# Defaults to ([\r\n]+), meaning data is broken into an event for each line
LINE_BREAKER = regular expression for event breaks
TRUNCATE = 999999 (always a high number / not 0)
# Use the following attributes to handle better load balancing from UF.
# Please note the EVENT_BREAKER properties are applicable for Splunk Universal
# Forwarder instances only. Valid with forwarders > 6.5.0
EVENT_BREAKER_ENABLE = true
EVENT_BREAKER = regular expression for event breaks