SIGs/bigdata/packaging/Spark

Spark packaging

Background

See Scala packaging for details on Fedora support for the Scala toolchain; briefly, we have version 2.10.3 of Scala in F19, F20, and Rawhide and sbt 0.13.1 is under review in Fedora as well.

Spark 0.9.0 works with Scala 2.10.3, and the upstream source repository currently has support for SBT 0.13.x.

Current Status

Apache Spark is under review in Fedora for rawhide (f21). The Fedora Spark package includes Spark Core, MLLib, GraphX, Bagel, and Spark Streaming, but currently (as of spark-0.9.0-0.2) has some differences from upstream Spark:

• it builds against Akka 2.3.0-RC2 instead of Akka 2.2.3 (this entails some trivial API changes)
• it doesn't support Kryo serialization yet (because Chill isn't yet available in Fedora), which limits some Spark Streaming functionality
• it doesn't support functionality dependent on Clearspring stream-lib, since stream-lib depends on bundled code and can't yet be packaged for Fedora; most notably, the countApproxDistinctByKey methods on RDDs aren't supported.
• it doesn't support Mesos, since the Fedora Mesos package doesn't include Java support

We're working on addressing these limitations.

Most of the Scala packages build with tests disabled (due to unavailable test dependencies) or with varying degrees of modification to the upstream build process (due to varying dependency versions or unavailable sbt plugins). If you're looking for an easy way to get involved, packaging some of these missing dependencies would be a great place to start. See the list under Scala packaging or find willb on IRC for more information

Dependencies

Spark requires Scala and SBT in order to build. (Note that there is a Maven build option as well, but it requires artifacts that need to be built with SBT.)

The easiest and most up-to-date place to see the dependency list is in the Spark repository itself, but here we will call out some notable dependencies that aren't already in Fedora:

Dependencies

Project	State	Review BZ	Packager	Notes
sbt	under review	sbt-package BZ	willb
lift-json	Not necessary any more with this patch (either carried or integrated into upstream)		willb
json4s	available to review	json4s-package BZ	willb
akka	available to review	1069871	willb (with gil)
Squeryl	awaiting a reviewer	1057770	willb	dependency of lift; no longer strictly necessary but still nice to have for the Scala ecosystem
scalaz	awaiting a reviewer	1055809	willb	dependency of lift-json; no longer strictly necessary but still nice to have for the Scala ecosystem
metrics	available in F20	861502	gil	Coda Hale's metrics (Java/Maven build).