Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/2711#discussion_r19492395
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala
---
@@ -120,16 +121,16 @@ private[spark] class CoarseMesosSchedulerBackend(
environment.addVariables(
Environment.Variable.newBuilder().setName("SPARK_CLASSPATH").setValue(cp).build())
}
- val extraJavaOpts = conf.getOption("spark.executor.extraJavaOptions")
+ val extraJavaOpts = conf.get("spark.executor.extraJavaOptions", "")
- val libraryPathOption = "spark.executor.extraLibraryPath"
- val extraLibraryPath = conf.getOption(libraryPathOption).map(p =>
s"-Djava.library.path=$p")
- val extraOpts = Seq(extraJavaOpts,
extraLibraryPath).flatten.mkString(" ")
+ val prefixEnv = conf.getOption("spark.executor.extraLibraryPath").map
{ p =>
+ Utils.prefixLibraryPath(Seq(p))
+ }.getOrElse("")
--- End diff --
I would add a comment here that explains why we have to set the environment
this way:
```
// Set the environment variable through the prefix because we need to
preserve the existing value
val prefixEnv = ...
```
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