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Retrieval returns zero samples for slowly changing PV's when the start and end times are close to the end of the partition boundary #323

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slacmshankar opened this issue Jan 29, 2025 · 1 comment
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Retrieval returns zero samples for slowly changing PV's when the start and end times are close to the end of the partition boundary #323

slacmshankar opened this issue Jan 29, 2025 · 1 comment
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@slacmshankar
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Reported by users in LCLS. This seems to be a regression in FileStreamCreator; need to investigate further. We do get data if the interval is large enough. GetDataAtTime also seems to work.
@slacmshankar slacmshankar self-assigned this Jan 29, 2025
@slacmshankar slacmshankar changed the title Retrieval misses events for slowly changing PV's when the start and end times are close to the end of the partition boundary Retrieval misses zero samples for slowly changing PV's when the start and end times are close to the end of the partition boundary Jan 29, 2025
@slacmshankar slacmshankar changed the title Retrieval misses zero samples for slowly changing PV's when the start and end times are close to the end of the partition boundary Retrieval returns zero samples for slowly changing PV's when the start and end times are close to the end of the partition boundary Jan 29, 2025
@slacmshankar
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Seems to be a boundary condition in FileBackedPBEventStream:seekToTimes. Our current tests do not cover this use case; will create a new one and then send a PR

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