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Alexey Romanenko edited comment on BEAM-9439 at 3/27/20, 5:56 PM: ------------------------------------------------------------------ Thank you for reporting this. Do you have any fix for that or an idea how {{getSplitBacklogBytes()}} could be implemented? Also, I'd ask [~pawel.kaczmarczyk], who initially worked on BEAM-2455, why {{getTotalBacklogBytes()}} was used in this case? was (Author: aromanenko): Thank you for reporting this. I'd ask [~pawel.kaczmarczyk], who initially worked on BEAM-2455, why {{getTotalBacklogBytes()}} was used in this case? > KinesisReader does not report correct backlog statistics > --------------------------------------------------------- > > Key: BEAM-9439 > URL: https://issues.apache.org/jira/browse/BEAM-9439 > Project: Beam > Issue Type: Bug > Components: io-java-kinesis > Reporter: Sam Whittle > Priority: Major > > The KinesisReader implementing KinesisIO reports backlog by implementing the > UnboundedSource.getTotalBacklogBytes() > method as opposed to the > UnboundedSource.getSplitBacklogBytes() > This value is supposed to represent the total backlog across all shards. > This function is implemented by calling > SimplifiedKinesisClient.getBacklogBytes with the watermark of the kinesis > shards managed within the UnboundedReader instance. As this watermark may be > further ahead than the watermark across all shards, this may miss backlog > bytes. > An additional concern is that the watermark is calculated using a > WatermarkPolicy, which means that the watermark may be inconsistent to the > kinesis timestamp for querying backlog. -- This message was sent by Atlassian Jira (v8.3.4#803005)