Re: Timestamp and key preservation over operators

Posted by Averell on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/Timestamp-and-key-preservation-over-operators-tp27627p27695.html

Thank you Fabian.

I have one more question about timestamp:
In the previous email, you asked how did I check the timestamp - I don't
have an answer. Then I only checked the watermark, not the timestamp. I had
the (wrong) assumption that watermarks advance along with timestamps.
Today I played with that early trigger window, putting the output into a
table, and found that the timestamp is set to the window's end-time, but the
watermark seems not. (My window is [10:00-10:15), my incoming msgs both have
time-stamp of 10:00, which trigger one early output with timestamp
10:14:59.999, but the watermark stays at 10:00)

Thus, my question: what is the easiest way to check the timestamp of a
message?

Thanks and regards,
Averell



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