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ASF GitHub Bot logged work on BEAM-9743: ---------------------------------------- Author: ASF GitHub Bot Created on: 13/Apr/20 18:08 Start Date: 13/Apr/20 18:08 Worklog Time Spent: 10m Work Description: lukemin89 commented on pull request #11397: [BEAM-9743] Fix TFRecordCodec to try harder to read/write URL: https://github.com/apache/beam/pull/11397 ReadableByteChannel/WritableByteChannel specifies that a single read/write request might be ignored, and read/write from 0 bytes to n bytes, where n is buffer.remaining(), even if there's more contents/space left in the channel. A similar issue has been pointed out and dealt with once. https://issues.apache.org/jira/browse/BEAM-5412?jql=text%20~%20%22tfrecord%22 But the same issue can happen for `header` and `footer` as well, and when writing data. I recently encountered this issue when trying to switch from GZIP compression to ZSTD compression. Make it try harder to read/write header/footer/data. ------------------------ Thank you for your contribution! Follow this checklist to help us incorporate your contribution quickly and easily: - [ R: @lukecwik ] [**Choose reviewer(s)**](https://beam.apache.org/contribute/#make-your-change) and mention them in a comment (`R: @username`). - [ ] Format the pull request title like `[BEAM-XXX] Fixes bug in ApproximateQuantiles`, where you replace `BEAM-XXX` with the appropriate JIRA issue, if applicable. This will automatically link the pull request to the issue. - [ ] Update `CHANGES.md` with noteworthy changes. - [ ] If this contribution is large, please file an Apache [Individual Contributor License Agreement](https://www.apache.org/licenses/icla.pdf). See the [Contributor Guide](https://beam.apache.org/contribute) for more tips on [how to make review process smoother](https://beam.apache.org/contribute/#make-reviewers-job-easier). 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---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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: 421501) Time Spent: 1h 50m (was: 1h 40m) > TFRecordCodec not attempt to fully read/write > --------------------------------------------- > > Key: BEAM-9743 > URL: https://issues.apache.org/jira/browse/BEAM-9743 > Project: Beam > Issue Type: Bug > Components: io-java-tfrecord, sdk-java-core > Reporter: Kyoungha Min > Assignee: Kyoungha Min > Priority: Critical > Time Spent: 1h 50m > Remaining Estimate: 0h > > The same issue has been pointed out and the issues were marked resolved. But > they were still remaining parts.... > https://issues.apache.org/jira/browse/BEAM-5412?jql=text%20~%20%22tfrecord%22 > > Issue # 1: TFRecordCodec only tries once to read the header/footer. This is > likely to fail around the end of channel buffer. > Issue # 2: (minor) TFRecordCodec currently does not checks how much it > writes. > > Seems like it only happens with Zstd compression (or any other picky input > stream that refuse to read fully). ZstdInputStream seems very picky at giving > out data. > The parts with the issue are > [https://github.com/apache/beam/blob/c7911043510a266078a3dc8faef7a1dbe1f598c5/sdks/java/core/src/main/java/org/apache/beam/sdk/io/TFRecordIO.java#L672] > [https://github.com/apache/beam/blob/c7911043510a266078a3dc8faef7a1dbe1f598c5/sdks/java/core/src/main/java/org/apache/beam/sdk/io/TFRecordIO.java#L699] > > And not so problem within the beam application (As all (or most) of > WritableByteChannels in beam-java-sdk-core are backed by some OutputStream), > but still not following the WritableByteChannel specification, > [https://github.com/apache/beam/blob/c7911043510a266078a3dc8faef7a1dbe1f598c5/sdks/java/core/src/main/java/org/apache/beam/sdk/io/TFRecordIO.java#L720-L727] > > ReadableByteChannel/WritableByteChannel Javadoc specifies that they are not > required to read/write fully, and can refuse to read/write time to time. -- This message was sent by Atlassian Jira (v8.3.4#803005)