Apache Beam 2.18.0

We are happy to present the new 2.18.0 release of Beam. This release includes both improvements and new functionality. See the download page for this release.

For more information on changes in 2.18.0, check out the detailed release notes.


  • BEAM-8470 - Create a new Spark runner based on Spark Structured streaming framework


  • BEAM-7636 - Added SqsIO v2 support.
  • BEAM-8513 - RabbitMqIO: Allow reads from exchange-bound queue without declaring the exchange.
  • BEAM-8540 - Fix CSVSink example in FileIO docs

New Features / Improvements


  • BEAM-8343 - [SQL] Add means for IO APIs to support predicate and/or project push-down when running SQL pipelines. And BEAM-8468, BEAM-8365, BEAM-8508.
  • BEAM-8427 - [SQL] Add support for MongoDB source.
  • BEAM-8456 - Add pipeline option to control truncate of BigQuery data processed by Beam SQL.

Breaking Changes

  • BEAM-8814 - –no_auth flag changed to boolean type.


  • BEAM-8252 AND BEAM-8254 Add worker_region and worker_zone options. Deprecated –zone flag and –worker_region experiment argument.

Dependency Changes

  • BEAM-7078 - com.amazonaws:amazon-kinesis-client updated to 1.13.0.
  • BEAM-8822 - Upgrade Hadoop dependencies to version 2.8.


  • BEAM-7917 - Python datastore v1new fails on retry.
  • BEAM-7981 - ParDo function wrapper doesn’t support Iterable output types.
  • BEAM-8146 - SchemaCoder/RowCoder have no equals() function.
  • BEAM-8347 - UnboundedRabbitMqReader can fail to advance watermark if no new data comes in.
  • BEAM-8352 - Reading records in background may lead to OOM errors
  • BEAM-8480 - Explicitly set restriction coder for bounded reader wrapper SDF.
  • BEAM-8515 - Ensure that ValueProvider types have equals/hashCode implemented for comparison reasons.
  • BEAM-8579 - Strip UTF-8 BOM bytes (if present) in TextSource.
  • BEAM-8657 - Not doing Combiner lifting for data-driven triggers.
  • BEAM-8663 - BundleBasedRunner Stacked Bundles don’t respect PaneInfo.
  • BEAM-8667 - Data channel should to avoid unlimited buffering in Python SDK.
  • BEAM-8802 - Timestamp combiner not respected across bundles in streaming mode.
  • BEAM-8803 - Default behaviour for Python BQ Streaming inserts sink should be to retry always.
  • BEAM-8825 - OOM when writing large numbers of ’narrow’ rows.
  • BEAM-8835 - Artifact retrieval fails with FlinkUberJarJobServer
  • BEAM-8836 - ExternalTransform is not providing a unique name
  • BEAM-8884 - Python MongoDBIO TypeError when splitting.
  • BEAM-9041 - SchemaCoder equals should not rely on from/toRowFunction equality.
  • BEAM-9042 - AvroUtils.schemaCoder(schema) produces a not serializable SchemaCoder.
  • BEAM-9065 - Spark runner accumulates metrics (incorrectly) between runs.
  • BEAM-6303 - Add .parquet extension to files in ParquetIO.
  • Various bug fixes and performance improvements.

Known Issues

  • BEAM-8882 - Python: beam.Create no longer preserves order unless reshuffle=False is passed in as an argument.

    You may encounter this issue when using DirectRunner.

  • BEAM-9065 - Spark runner accumulates metrics (incorrectly) between runs

  • BEAM-9123 - HadoopResourceId returns wrong directory name

  • See a full list of open issues that affect this version.

  • BEAM-9144 - If you are using Avro 1.9.x with Beam you should not upgrade to this version. There is an issue with timestamp conversions. A fix will be available in the next release.

List of Contributors

According to git shortlog, the following people contributed to the 2.18.0 release. Thank you to all contributors!

Ahmet Altay, Aizhamal Nurmamat kyzy, Alan Myrvold, Alexey Romanenko, Alex Van Boxel, Andre Araujo, Andrew Crites, Andrew Pilloud, Aryan Naraghi, Boyuan Zhang, Brian Hulette, bumblebee-coming, Cerny Ondrej, Chad Dombrova, Chamikara Jayalath, Changming Ma, Chun Yang, cmachgodaddy, Colm O hEigeartaigh, Craig Chambers, Daniel Oliveira, Daniel Robert, David Cavazos, David Moravek, David Song, dependabot[bot], Derek, Dmytro Sadovnychyi, Elliotte Rusty Harold, Etienne Chauchot, Hai Lu, Henry Suryawirawan, Ismaël Mejía, Jack Whelpton, Jan Lukavský, Jean-Baptiste Onofré, Jeff Klukas, Jincheng Sun, Jing, Jing Chen, Joe Tsai, Jonathan Alvarez-Gutierrez, Kamil Wasilewski, KangZhiDong, Kasia Kucharczyk, Kenneth Knowles, kirillkozlov, Kirill Kozlov, Kyle Weaver, liumomo315, lostluck, Łukasz Gajowy, Luke Cwik, Mark Liu, Maximilian Michels, Michal Walenia, Mikhail Gryzykhin, Niel Markwick, Ning Kang, nlofeudo, pabloem, Pablo Estrada, Pankaj Gudlani, Piotr Szczepanik, Primevenn, Reuven Lax, Robert Bradshaw, Robert Burke, Rui Wang, Ruoyun Huang, RusOr10n, Ryan Skraba, Saikat Maitra, sambvfx, Sam Rohde, Samuel Husso, Stefano, Steve Koonce, Steve Niemitz, sunjincheng121, Thomas Weise, Tianyang Hu, Tim Robertson, Tomo Suzuki, tvalentyn, Udi Meiri, Valentyn Tymofieiev, Viola Lyu, Wenjia Liu, Yichi Zhang, Yifan Zou, yoshiki.obata, Yueyang Qiu, ziel, 康智冬