Contributing Search
All the projects below have beginner-friendly issues which are great places to start contributing
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playframework/playframework
The Community Maintained High Velocity Web Framework For Java and Scala.
- #13045 - Module with Config without Play dependency
- #13013 - Error at shutdown if tmpdir is not writeable even though it is not used
- #12981 - Improve GZipFilter compliance with the HTTP standards
- #12979 - Impossible pass empty list of non-string type as query param for route with non-empty default value
- #12968 - Add some configs on how the evolutions script parser splits semicolons
- #12888 - Support Pekko HTTP 1.1
Contributing Guide Code of Conduct -
twitter/finagle
A fault tolerant, protocol-agnostic RPC system
- #968 - Feature Request: Emoji Hashtags/Cashtags
- #965 - Client with TLS configuration not working on version v22.12.0 onwards - java.lang.IllegalArgumentException: ApplicationProtocols.Supported is not supported at this time for SslContextClientEngineFactory. Remote Info: Not Available
- #964 - Update the Netty to latest version (4.1.108.Final) - Vulnerability CVE-2024-29025
- #962 - finagle-http: Http methodbuilder does not allow setting sendInterrupts flag to backup request filter
- #955 - com.twitter.finagle.Http not work
- #953 - How to use the partitioning strategy with the http client?
Contributing Guide Code of Conduct -
akka/akka
A platform to build and run apps that are elastic, agile, and resilient. SDK, libraries, and hosted environments.
- #32579 - NullpointerException in typed receiveSignal
- #32554 - Failed: EventSourcedBehaviorLoggingSpec
- #32525 - [Akka-remote]Regular DisassociatedEvent. In a good network environment, the load on the nodes is low, and the jvm does not run full gc for a long time, a large number of AssociationError errors are reported in spark logs
- #32522 - The documentation for Akka/Java could be upgraded to use Java 16 records?
- #32520 - Failed: DnsDiscoverySpec
- #32485 - TypedMultiMap doesn't compile with Scala 3.4+
Contributing Guide Code of Conduct -
typelevel/cats
Lightweight, modular, and extensible library for functional programming.
- #4696 - drop/dropRight/take/takeRight on TraverseFilter
- #4689 - Show null compatibility with scala string interpolator
- #4681 - `Either.catchOnly` and `-Yexplicit-nulls` are not playing well together
- #4664 - algebra.ring.Semiring conflicts with Wikipedia Semiring definition in that it lacks a `one` element
- #4663 - sponsors.js should probably be deduplicated
- #4647 - Sporadic test errors since upgrading to Native 0.5
Contributing Guide Code of Conduct -
linkerd/linkerd
Old repo for Linkerd 1.x. See the linkerd2 repo for Linkerd 2.x.
- #2460 - ZooKeeper server set namer `io.l5d.serversets` appears to leak ZooKeeper watches
- #2451 - Namerd version admin port
- #2446 - serverSession: idleTimeMs times out while there is activity
- #2442 - We are running Namerd & Consul cluster in our environment ,getting below error frequently and that break application communication
- #2411 - Linkerd sporadically stops watching remote addresses in Namerd with thrift interpreter
- #2403 - pull-destination-proto.sh should use a pinned version
Contributing Guide Code of Conduct -
sbt/sbt
sbt, the interactive build tool
- #8014 - `sbt` launcher says it downloads for `x86_64` on MacOS `arm64`
- #8004 - testForkedParallel does not behave the same as parallelExecution
- #8003 - `xx:yy` looks like `hh:mm` not minutes and seconds in `timing` output
- #8002 - Times and percentages exceed wall clock in GCMonitor warning
- #7981 - Feature Request: Support HTML Output for `inspect tree`
- #7976 - [2.x] compile on AppVeyor causes java.io.FileNotFoundException: C:\temp\....\inc_compile_3.zip (Access is denied)
Contributing Guide Code of Conduct -
microsoft/synapseml
Simple and Distributed Machine Learning
- #2341 - Vowpal Wabbit - Large cardinality
- #2340 - Need to perform incremental training
- #2336 - LightGBM dataset parameters
- #2333 - [BUG] SIGSEGV / SIGBUS error in streaming mode LightGBM
- #2328 - Support multiple treatments in Causal ML
- #2323 - [BUG] lightgbm and CrossValidator are not compatible
Contributing Guide Code of Conduct -
zio/zio
ZIO — A type-safe, composable library for async and concurrent programming in Scala
- #9494 - After update to ZIO 2.1 on_start of Supervisor works strange
- #9485 - No way to catch or tap Error as Cause without defects
- #9470 - `ZStream#mapZIOPar(n: UIO[Int])(...)`
- #9467 - TQueue: provide peekAll
- #9458 - ZEnvironment.prune fails when providing keyed intersection type (Map[String, One & Two]) using ZLayer
- #9431 - Introduce TestAspect.clockFactor
Contributing Guide Code of Conduct -
delta-io/delta
An open-source storage framework that enables building a Lakehouse architecture with compute engines including Spark, PrestoDB, Flink, Trino, and Hive and APIs
- #4080 - Delta version 3.3.0 having dependency issues with spark 3.5.x
- #4076 - [BUG][Spark] Microsoft Fabric lakehouse with schema enabled
- #4060 - [Question] When does the delat kernel support the deletion vector?
- #4045 - [BUG][Spark] Auto Compaction trigger logic is not consistent with documentation
- #4043 - [Feature Request][Spark] Auto Compaction shouldn't be trigged if compaction hasn't been run yet
- #4032 - [PROTOCOL RFC] Support Variant shredding feature
Contributing Guide Code of Conduct -
twitter/scalding
A Scala API for Cascading
- #2001 - my account is closed
- #1998 - duplicate tags in pom files
- #1997 - incompatibility with recent java8 runtime environments due to hadoop
- #1988 - [Proposal] Support more sinks/sources in scalding-spark
- #1979 - Beam backend is missing some pipes
- #1971 - flake on optimization test
Contributing Guide Code of Conduct -
slick/slick
Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala
- #3051 - Scala 3: 22 fields limitation still exists
- #3030 - Java 8 support broken in Slick 3.5.2
- #3028 - Support H2 v2.x
- #3027 - Support Unique constraints (on multiple columns), and other constraints (such as Check constraints perhaps)
- #3026 - OracleProfile LocalDateTime can have 9 nanoseconds numbers but there is a restriction to just 3 in OracleProfile
- #2970 - Wrong logic for InsertOrUpdate
Contributing Guide Code of Conduct -
http4s/http4s
A minimal, idiomatic Scala interface for HTTP
- #7621 - Concerns regarding the use of `unsafeRunSync()` in logging functionality
- #7598 - Connection reset exception on websocket server
- #7578 - http4s `0.22`: Add support for Jetty `12` to address `CVE-2024-6763`
- #7558 - ember client fail on already closed http2 streams
- #7543 - Default Logger middleware can cause OOMs
- #7540 - EmberClient GoAway Frame not Handled Gracefully
Contributing Guide Code of Conduct -
circe/circe
Yet another JSON library for Scala
- #2326 - Support deriving Encoder / Decoder for `NamedTuples` ?
- #2322 - scala3 default values should not be lazy val
- #2318 - Add Automatic-Module-Name
- #2311 - Numbers bigger than `1L << 53` loose lower bits when parsing by default parser using Scala.js
- #2310 - Consider adding support for json raw string value
- #2300 - The documentation doesn´t specifiy it is available for Scala 3
Contributing Guide Code of Conduct -
typelevel/fs2
Compositional, streaming I/O library for Scala
- #3503 - fs2 gunzip doesn't support concatenated gzip files
- #3502 - Stream hangs on error with broadcastThrough and readOutputStream
- #3487 - parEvalMap resets stream cancellation
- #3486 - parEvalMap and it's variations hang on canceled effect
- #3485 - prefetch hangs on a canceled stream
- #3484 - `Pull`'s public api is unsound
Contributing Guide Code of Conduct -
salesforce/transmogrifai
TransmogrifAI (pronounced trăns-mŏgˈrə-fī) is an AutoML library for building modular, reusable, strongly typed machine learning workflows on Apache Spark with minimal hand-tuning
- #579 - Docs & scaladoc websites are down
- #557 - Make RecordInsightsLOCO perform reasonable calculation on numeric features and fix the name to reflect actual calculation.
- #556 - Changing imputation for nulls in DateToUnitCircleTransformer
- #543 - Failed to run titanic example, got java.lang.AbstractMethodError
- #539 - Normalize special characters in string
- #535 - UV Computation
Contributing Guide Code of Conduct -
typelevel/doobie
Functional JDBC layer for Scala.
- #2152 - postgres.TextSuite hangs sometimes
- #2148 - The link "here" on the first page of the docs is not working
- #2147 - Convert to use munit-cats-effect
- #2144 - Regression with `Option[Record]` results in 1.0.0-RC6
- #2134 - Document running custom JDBC operations
- #2129 - Docker images - no postgis/mysql image for linux/arm64 (e.g. Apple M1)
Contributing Guide Code of Conduct -
zio/zio-quill
Compile-time Language Integrated Queries for Scala
- #3165 - Option[List] type goes wrong in db when filter with a condition #541
- #3149 - Prevent quill from wrapping raw sql into subquery
- #3148 - Cascading Column Names for nested Case Classes.
- #3144 - Naming strategy is not propagated to `onConflictUpdate`
- #3131 - Postgres Timestamp null
- #3125 - Embedded Scala case classes are not translated to CQL queries
Contributing Guide Code of Conduct -
scalameta/metals
Scala language server with rich IDE features 🚀
- #7149 - Metals does not automatically setup the Mill BSP server
- #7141 - edit -> compile -> test cycle is unexpectedly long if project includes native target
- #7138 - `Extract` code action should support fewer baces syntax
- #7137 - Inline should support indentation sensitive blocks
- #7136 - Sbt will not always work correctly with sbt BSP
- #7123 - Individual test doesn't seem to run after changing its name
Contributing Guide Code of Conduct