git commit: [SPARK-1089] fix the regression problem on ADD_JARS in 0.9

[pw...@apache.org]

Repository: spark
Updated Branches:
  refs/heads/master 6ccd6c55b -> 345df5f4a


[SPARK-1089] fix the regression problem on ADD_JARS in 0.9

https://spark-project.atlassian.net/browse/SPARK-1089

copied from JIRA, reported by @ash211

"Using the ADD_JARS environment variable with spark-shell used to add the jar to both the shell and the various workers. Now it only adds to the workers and importing a custom class in the shell is broken.
The workaround is to add custom jars to both ADD_JARS and SPARK_CLASSPATH.
We should fix ADD_JARS so it works properly again.
See various threads on the user list:
https://mail-archives.apache.org/mod_mbox/incubator-spark-user/201402.mbox/%3CCAJbo4neMLiTrnm1XbyqomWmp0m+EUcg4yE-txuRGSVKOb5KLeA@mail.gmail.com%3E
(another one that doesn't appear in the archives yet titled "ADD_JARS not working on 0.9")"

The reason of this bug is two-folds

in the current implementation of SparkILoop.scala, the settings.classpath is not set properly when the process() method is invoked

the weird behaviour of Scala 2.10, (I personally thought it is a bug)

if we simply set value of a PathSettings object (like settings.classpath), the isDefault is not set to true (this is a flag showing if the variable is modified), so it makes the PathResolver loads the default CLASSPATH environment variable value to calculated the path (see https://github.com/scala/scala/blob/2.10.x/src/compiler/scala/tools/util/PathResolver.scala#L215)

what we have to do is to manually make this flag set, (https://github.com/CodingCat/incubator-spark/blob/e3991d97ddc33e77645e4559b13bf78b9e68239a/repl/src/main/scala/org/apache/spark/repl/SparkILoop.scala#L884)

Author: CodingCat <zh...@gmail.com>

Closes #13 from CodingCat/SPARK-1089 and squashes the following commits:

8af81e7 [CodingCat] impose non-null settings
9aa2125 [CodingCat] code cleaning
ce36676 [CodingCat] code cleaning
e045582 [CodingCat] fix the regression problem on ADD_JARS in 0.9


Project: http://git-wip-us.apache.org/repos/asf/spark/repo
Commit: http://git-wip-us.apache.org/repos/asf/spark/commit/345df5f4
Tree: http://git-wip-us.apache.org/repos/asf/spark/tree/345df5f4
Diff: http://git-wip-us.apache.org/repos/asf/spark/diff/345df5f4

Branch: refs/heads/master
Commit: 345df5f4a9c16a6a87440afa2b09082fc3d224bd
Parents: 6ccd6c5
Author: CodingCat <zh...@gmail.com>
Authored: Wed Feb 26 23:42:15 2014 -0800
Committer: Patrick Wendell <pw...@gmail.com>
Committed: Wed Feb 26 23:42:15 2014 -0800

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 repl/src/main/scala/org/apache/spark/repl/SparkILoop.scala | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)
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http://git-wip-us.apache.org/repos/asf/spark/blob/345df5f4/repl/src/main/scala/org/apache/spark/repl/SparkILoop.scala
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diff --git a/repl/src/main/scala/org/apache/spark/repl/SparkILoop.scala b/repl/src/main/scala/org/apache/spark/repl/SparkILoop.scala
index 013cea0..f52ebe4 100644
--- a/repl/src/main/scala/org/apache/spark/repl/SparkILoop.scala
+++ b/repl/src/main/scala/org/apache/spark/repl/SparkILoop.scala
@@ -182,8 +182,13 @@ class SparkILoop(in0: Option[BufferedReader], protected val out: JPrintWriter,
 
   /** Create a new interpreter. */
   def createInterpreter() {
-    if (addedClasspath != "")
-      settings.classpath append addedClasspath
+    require(settings != null)
+
+    if (addedClasspath != "") settings.classpath.append(addedClasspath)
+    // work around for Scala bug
+    val totalClassPath = SparkILoop.getAddedJars.foldLeft(
+      settings.classpath.value)((l, r) => ClassPath.join(l, r))
+    this.settings.classpath.value = totalClassPath
 
     intp = new SparkILoopInterpreter
   }