Contributing Search
All the projects below have beginner-friendly issues which are great places to start contributing
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typelevel/cats-effect
The pure asynchronous runtime for Scala
- #4401 - is order of context parameters important?
- #4397 - UUIDGen Implicit Prioritization Issue on Scala 2.12
- #4396 - Proposal: Retries
- #4393 - Console: test version?
- #4387 - Add Scala 3.6 to build coverage
- #4382 - WSTP threads leak
Contributing Guide Code of Conduct -
twitter/summingbird
Streaming MapReduce with Scalding and Storm
- #773 - Use more container than chain
- #760 - Summingbird batch doesn't work with the latest Scalding develop
- #749 - storm platform sometimes makes nodes with only merges
- #746 - summingbird does not preserve equality on Producers
- #743 - optionMap not being fused with flatMap in storm
- #741 - Remove `ArbitraryWorkaround` class when scala check release will be out
Contributing Guide Code of Conduct -
twitter/finatra
Fast, testable, Scala services built on TwitterServer and Finagle
- #593 - CaseClassMappingException occurs during the deserialization of query parameters.
- #592 - ability to support different request/response types for a route based on the api version
- #590 - Wrong usage of QueryStringDecoder.decodeComponent in PathPattern
- #587 - How to achieve graceful server shutdown for environments that rely on healthcheck to mark nodes unhealthy
- #584 - MDC and Log4J2 do not get along very well
- #583 - Restricting/removing admin routes
Contributing Guide Code of Conduct -
typelevel/scalacheck
Property-based testing for Scala
- #1105 - sbt ScalaCheckRunner: loss of test selection fidelity
- #1082 - Website "News" out of date
- #1078 - Support live visualizations with Tyche, via the `OpenPBTStats` log format?
- #1043 - Publish javadoc with dependency
- #1028 - Partition a finite collection?
- #993 - Add edge cases to Gen.choose[BigInt]
Contributing Guide Code of Conduct -
spotify/scio
A Scala API for Apache Beam and Google Cloud Dataflow.
- #5675 - Documentation fixes for scio parquet testing harness
- #5674 - SortedBucketIO.read() failed with memory issue for large dataset
- #5673 - Upgrade to gcs-connector 3.x
- #5659 - Inconsistent null-value behavior between Caffeine and Guava cache
- #5644 - BigQuery writes with GenericRecord format don't support overridden non-String types
- #5642 - More bugs with Avro format support in BigQueryType writes
Contributing Guide Code of Conduct -
monix/monix
Asynchronous, Reactive Programming for Scala and Scala.js.
- #1850 - by-name parameter in `as` method
- #1846 - Recursive binds in onErrorHandleWith are not heap-safe
- #1832 - bufferIntrospective emits at most Platform.recommendedBatchSize elements
- #1777 - The developers, documentation for monix
- #1742 - Migrating to parMap/parZip resulting in function getting stuck and timing out
- #1720 - Stack traces don't get propagated through `runSyncUnsafe()`
Contributing Guide Code of Conduct -
typelevel/spire
Powerful new number types and numeric abstractions for Scala.
- #1342 - Scala Native 0.5
- #1337 - Proposal: `andThen` for Polynomial?
- #1315 - Gaussian sampler crashes randomly with ArrayIndexOutOfBoundsException
- #1313 - `Complex` `atan2` and `tanh` are wrong
- #1309 - RFE: inline methods for spire algebra typeclass instances
- #1225 - Use of bug in `cfor` macro
Contributing Guide Code of Conduct -
lagom/lagom
Reactive Microservices for the JVM
- #3367 - Lagom 1.6.7 runAll failing because of semver check on sbt 1.9.7
- #3366 - Reviving Lagom in the context of Pekko, Play 3.0, Scala 3
- #3353 - Kafka client upgrade
- #3352 - At-most-once for Read Side Processor
- #3351 - `atLeastOnce` Kafka Consumer not restarting on error
- #3348 - Lagom bom-pom includes transitive dependencies
Contributing Guide Code of Conduct -
japgolly/scalajs-react
Facebook's React on Scala.JS
- #1084 - Provide default IO/SyncIO error handler for component
- #1081 - A minimal setup fails with Scala 3
- #1080 - Cannot mix static and dynamic routes even if conditional
- #1079 - Modern testing recipe?
- #1078 - Add support for Discussions tab in Github
- #1076 - Missing getDerivedStateFromError
Contributing Guide Code of Conduct -
typelevel/skunk
A data access library for Scala + Postgres.
- #1190 - Un-revert #1114
- #1185 - Peer authentication for local connections
- #1138 - Add option to turn off emojis in exceptions
- #1133 - Unhandled backend message was encountered: L -> 3318, C -> 57014,
- #1127 - Metric to track Postgres errors
- #1119 - Codecs for Native and JS types
Contributing Guide Code of Conduct -
scala-exercises/scala-exercises
The easy way to learn Scala.
- #1220 - Number of watchers, stars and forks on top page is shown as 0
- #1219 - Missing navigation buttons
- #1156 - HTTPS certificate expired at www.scala-exercises.org
- #1135 - Scala 3
- #1096 - Stdlib Sets docs error
- #1067 - New contributions blocked by java 9 permissions
Contributing Guide Code of Conduct -
sbt/sbt-native-packager
sbt Native Packager
- #1698 - different settings values for `publish` vs `publishLocal`
- #1691 - Graal Native Image '-H:Name' option should be replaced by '-o'
- #1687 - In LauncherJarPlugin, when the project script (i.e. "main script") name is the same as the main class script name, the main class script simply overwriters the project script
- #1679 - Recommend changing the default `openjdk:8` Docker image
- #1677 - Optimize Docker image layering
- #1654 - How to configure WatchDog in systemd?
Contributing Guide Code of Conduct -
apache/kyuubi
Apache Kyuubi is a distributed and multi-tenant gateway to provide serverless SQL on data warehouses and lakehouses.
- #7051 - [Bug] JDBC Driver with hive2 protocol throw HadoopConfiguration class not found when `trustStorePassword` is not provided
- #7050 - [FEATURE] Dynamic Engine Pool Scaling
- #7049 - [FEATURE] Ranger check support iceberg all operation permission check
- #7040 - [Bug] [AUTHZ]ALTER operation to change the table name don't require any permission
- #7019 - [Bug] Spark Driver cannot be shutdown at the end of a task
- #7018 - [Bug] Configuration "kyuubi.session.engine.flink.fetch.timeout" is not working as expected.
Contributing Guide Code of Conduct -
byzer-org/byzer-lang
Byzer (former MLSQL): A low-code open-source programming language for data pipeline, analytics and AI.
- #1939 - 项目还在维护中吗
- #1938 - 源码不开源了么
- #1933 - 无法连接elasticsearch
- #1929 - 使用docker-compose启动如何设置持久化数据
- #1928 - 为什么显示不支持chatglm2-6b微调
- #1927 - org.apache.spark.SparkException: Failed to execute user defined function (Ray$$Lambda$6471/213060338: (array<string>) => array<string>)
Contributing Guide Code of Conduct -
twitter/twitter-server
Twitter-Server defines a template from which services at Twitter are built
- #81 - Adopt nostr protocol to improve Twitter's censorship resistance
- #78 - Inconsistent Documentation in index.css
Contributing Guide Code of Conduct -
scalameta/scalafmt
Code formatter for Scala
- #4884 - Hard to track changes across multiple versions
- #4883 - format floats and doubles with leading zero
- #3542 - multi-architecture docker image
- #3490 - Adoption of AUR package but ran into issues
- #3035 - Publish Scala 3 artifacts
- #1736 - Automate regression tests
Contributing Guide Code of Conduct -
twitter/rsc
Experimental Scala compiler focused on compilation speed
- #491 - Is this project dead?
- #488 - Support loading symbols from .sig files
- #484 - RscCompat rule is not auto-discoverable by scalafix
- #475 - Function of a single tuple is ascribed incorrect parentheses
- #474 - Don't ascribe type refinements in case of overrides with different modifier
- #472 - Tuple1 is ascribed incorrectly
Contributing Guide Code of Conduct -
akka/alpakka-kafka
Alpakka Kafka connector - Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka.
- #1830 - Transactional stream transactions in limbo for a long time before failing with invalid epoch
- #1829 - Transactional source fails to consume for extended period, eventually fails with timeout while draining
- #1783 - CommittingProducerSinkStage never completes
- #1745 - Failed: unclear
- #1688 - failed: RebalanceExtSpec
- #1671 - CommittingProducerSinkStageLogic incorrectly counts awaitingCommitResult
Contributing Guide Code of Conduct -
holdenk/spark-testing-base
Base classes to use when writing tests with Spark
- #444 - assertDataFrameDataEquals fails when Map type is present because is not orderable
- #437 - assertRDDEquals gives too much logging
- #418 - Replace deprecated SQLContext with SparkSession for DataFrame / DataSet / RDD generators
- #413 - Codec [lz4] is not available. Consider setting spark.io.compression.codec=snappy
- #400 - What is the reason this project uses inheritance rather than implementing Junit's Rule?
- #354 - Unable to run tests with Spark v3.2.1 and scalatest v3.2.x
Contributing Guide Code of Conduct -
akka/akka-http
The Streaming-first HTTP server/module of Akka
- #4481 - It's not possible to serve HEAD request with Content-Lenght
- #4471 - Retries on connect timeout
- #4462 - Misleading early response warning on HTTP/1.1 HEAD/OPTIONS requests with Transfer-Encoding: chunked
- #4457 - Route can't complete response until server request timeout if the client close the connection ungracefully
- #4410 - `Content-Disposition` header parsing for `form-data` doesn't follow RFC7578
- #4406 - Explicit typed actor system to Http.apply does not compile on Scala 3
Contributing Guide Code of Conduct