Hi,

I posted this question on Stack Overflow a few days ago and hoping I can
get some eyes on it:
https://stackoverflow.com/questions/79600594/ignitedatastreamer-resulting-in-partition-states-validation-has-failed-partition.
Essentially, if there's a partition map exchange running while I stream
data in parallel into a cache (partitioned with 1 backup), I see WARN
logging about partition update counters being inconsistent *after *the
final streaming job has finished.

Is this a bug? It seems to contradict the IgniteDataStreamer API
where "data streamer doesn’t guarantee [...] data consistency until
successfully finished." Full details with some additional observations and
sample code to reproduce are included in the original post.

Thanks in advance!
John

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