Hi,

We make API requests to fetch performance reports of Keyword,
Placement, Automatic Placements and Ad types for a campaign.

We are experiencing repeated failures due to
DatabaseError.CONCURRENT_MODIFICATION while submitting the report
requests.

Our platform is a multi threaded service with three threads
configured, each thread with different date range.
We observed that, at a time only two report requests are getting
completed and the third one is getting failed with CONCURRENT
MODIFICATION error.

We have a mechanism to catch these errors and retry automatically. But
this failure rate is exceeding our configured threshold. We have been
experiencing this issue from last three days.

Please let us know how to debug these repeated failures.


Thank you,
Sudarshan

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