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ASF GitHub Bot logged work on BEAM-8352: ---------------------------------------- Author: ASF GitHub Bot Created on: 08/Oct/19 16:13 Start Date: 08/Oct/19 16:13 Worklog Time Spent: 10m Work Description: aromanenko-dev commented on pull request #9745: [BEAM-8352] Add "withMaxCapacityPerShard()" to KinesisIO.Read URL: https://github.com/apache/beam/pull/9745 Added new configuration option `withMaxCapacityPerShard()` to `KinesisIO.Read` to provide a possibility to control the size of `ShardReadersPool.recordsQueue` in case if default value (10K records per shard) can cause NPE for topics with big amount of shards or large messages that can't fit into memory. ------------------------ Thank you for your contribution! 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To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org Issue Time Tracking ------------------- Worklog Id: (was: 325159) Remaining Estimate: 0h Time Spent: 10m > Reading records in background may lead to OOM errors > ---------------------------------------------------- > > Key: BEAM-8352 > URL: https://issues.apache.org/jira/browse/BEAM-8352 > Project: Beam > Issue Type: Bug > Components: io-java-kinesis > Affects Versions: 2.2.0, 2.3.0, 2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.0, 2.9.0, > 2.10.0, 2.11.0, 2.12.0, 2.13.0, 2.14.0, 2.15.0 > Reporter: Mateusz Juraszek > Assignee: Alexey Romanenko > Priority: Major > Time Spent: 10m > Remaining Estimate: 0h > > We have faced a problem with OOM errors in our dataflow job containing > Kinesis sources. After investigation, it occurred that the issue was caused > by too many records being consumed by Kinesis sources that pipeline couldn't > handle in time. > Looking into the Kinesis connector's code, the internal queue (recordsQueue) > that records are being put in the background is setup for each > ShardReadersPool (created for each source being Kinesis stream). The size of > the queue is set to `queueCapacityPerShard * number of shards`. The bigger > number of shards, the bigger queue size. There is no ability to limit the > maximum capacity of the queue (queueCapacityPerShard is also not configurable > and it's set to DEFAULT_CAPACITY_PER_SHARD=10_000). Additionally, there is no > differentiation on records size, so the size of data placed to the queue > might increase to the point where OOM will be thrown. > It would be great to have ability to somehow limit the number of records that > are being read in the background to some sensible value. At the beginning, > simple solution would be to allow configuring max queue size for source at > the creation of KinesisIO. -- This message was sent by Atlassian Jira (v8.3.4#803005)