Hi Alaka,
There's a bit of text cut off in the error message. The full one is
something like:
"Time ordering is not supported for a Scan query with %,d
segments per time chunk and a row limit of %,d. "
+ "Try reducing your query limit below
maxRowsQueuedForOrdering (currently %,d), or using compaction to "
+ "reduce the number of segments per time chunk, or raising
maxSegmentPartitionsOrderedInMemory "
+ "(currently %,d) above the number of segments you have per
time chunk.",
So, in general you could try:
- Reduce the number of segments in each time chunk, perhaps using
compaction (
https://druid.apache.org/docs/latest/data-management/compaction.html)
- Or, increase druid.query.scan.maxSegmentPartitionsOrderedInMemory
- Reduce the limit of your Scan query
- Or, increase druid.query.scan.maxRowsQueuedForOrdering
Note that the "increase" options will lead to more memory usage, so you'd
want to keep an eye on that.
On Tue, May 9, 2023 at 1:03 PM Alaka Thorat wrote:
> Hi,
>
> I am getting the following druid error message in Superset.
>
> Error message: "Error: Resource limit
> exceeded(org.apache.druid.query.ResourseLimitExceededException): Time
> ordering
> is not supported for a Scan Query
>
> This happens on one tab with chart set up(in Superset) without server
> pagination & row limit<=10.
>
> But when I use a different tab with the same configuration(without
> pagination/row limit=10), it works.
>
> However the issue is sorted by "__time" has been removed then also it is
> working again with server pagination=unticked & row limit=30,
> but there is issue of descending ordering again.
>
>
> I am requesting you, What changes I have to do to avoid the above Druid
> error message given by Superset.
>
>
> Thanks
> --Alaka
>
