Hi Roland,
LWTs set consistency level implicitly to SERIAL which requires at least
QUORUM.
No, no node is/was down. If that happens the query will fail with "Could
not achieve consistency level QUORUM ..."
2017-04-12 16:48 GMT+02:00 Roland Otta <roland.o...@willhaben.at>:
> Hi Benjamin,
>
> its unlikely that i can assist you .. but nevertheless ... i give it a try
> ;-)
>
> whats your consistency level for the insert?
> what if one ore more nodes are marked down and proper consistency cant be
> achieved?
> of course the error message does not indicate that problem (as it says its
> a timeout)... but in that case you would get an instant error for inserts.
> wouldn't you?
>
> br,
> roland
>
>
>
> On Wed, 2017-04-12 at 15:09 +0200, benjamin roth wrote:
>
> Hi folks,
>
> Can someone explain why that occurs?
>
> Write timeout after 0.006s
> Query: 'INSERT INTO log_moment_import ("source", "reference", "user_id",
> "moment_id", "date", "finished") VALUES (3, '1305821272790495', 65675537,
> 0, '2017-04-12 13:00:51', NULL) IF NOT EXISTS
> Primary key and parition key is source + reference
> Message: Operation timed out - received only 1 responses.
>
> This appears every now and then in the log. When I check the for the
> record in the table, it is there.
> I could explain that, if the WTE occured after the configured write
> timeout but it happens withing a few milliseconds.
> Is this caused by lock contention? It is possible that there are
> concurrent inserts on the same PK - actually thats the reason why I use
> LWTs.
>
> Thanks!
>
>
