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## What changes were proposed in this pull request? This patch modifies SparkBuild so that the largest / slowest test suites (or collections of suites) can run in their own forked JVMs, allowing them to be run in parallel with each other. This opt-in / whitelisting approach allows us to increase parallelism without having to fix a long-tail of flakiness / brittleness issues in tests which aren't performance bottlenecks. See comments in SparkBuild.scala for information on the details, including a summary of why we sometimes opt to run entire groups of tests in a single forked JVM . The time of full new pull request test in Jenkins is reduced by around 53%: before changes: 4hr 40min after changes: 2hr 13min ## How was this patch tested? Unit test Closes #24373 from gengliangwang/parallelTest. Authored-by: Gengliang Wang <gengliang.wang@databricks.com> Signed-off-by: Wenchen Fan <wenchen@databricks.com> |
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| .. | ||
| build.properties | ||
| MimaBuild.scala | ||
| MimaExcludes.scala | ||
| plugins.sbt | ||
| SparkBuild.scala | ||