zsxwing ff71d34e00 [SPARK-7693][Core] Remove "import scala.concurrent.ExecutionContext.Implicits.global" ... Learnt a lesson from SPARK-7655: Spark should avoid to use `scala.concurrent.ExecutionContext.Implicits.global` because the user may submit blocking actions to `scala.concurrent.ExecutionContext.Implicits.global` and exhaust all threads in it. This could crash Spark. So Spark should always use its own thread pools for safety. This PR removes all usages of `scala.concurrent.ExecutionContext.Implicits.global` and uses proper thread pools to replace them. Author: zsxwing <zsxwing@gmail.com> Closes #6223 from zsxwing/SPARK-7693 and squashes the following commits: a33ff06 [zsxwing] Decrease the max thread number from 1024 to 128 cf4b3fc [zsxwing] Remove "import scala.concurrent.ExecutionContext.Implicits.global"		2015-05-17 20:37:19 -07:00
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src	[SPARK-7693][Core] Remove "import scala.concurrent.ExecutionContext.Implicits.global"	2015-05-17 20:37:19 -07:00
pom.xml	[SPARK-7485] [BUILD] Remove pyspark files from assembly.	2015-05-12 01:39:21 -07:00