Github user pwendell commented on a diff in the pull request:
https://github.com/apache/spark/pull/615#discussion_r12223079
--- Diff: core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala
---
@@ -83,7 +83,8 @@ private[spark] class Worker(
@volatile var registered = false
@volatile var connected = false
val workerId = generateWorkerId()
- val sparkHome = new
File(Option(System.getenv("SPARK_HOME")).getOrElse("."))
+ val sparkHome = new File(conf.getOption("spark.home").orElse(Option(
--- End diff --
SparkConf is intended for application-wide configurations. SPARK_HOME is
actually a node-dependent configuration, so we'd prefer to keep it outside of
Spark conf. If you look we've done this for other node-specific configs like
SPARK_LOCAL_DIR.
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