Github user yhuai commented on the issue:
https://github.com/apache/spark/pull/15857
```
[error] [warn]
/home/jenkins/workspace/spark-master-compile-sbt-scala-2.10/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/expressions.scala:439:
Cannot check match for unreachability.
[error] (The analysis required more space than allowed. Please try with
scalac -Dscalac.patmat.analysisBudget=512 or
-Dscalac.patmat.analysisBudget=off.)
[error] [warn] CleanupAliases(plan.transformUp {
[error] [warn]
[error] [warn]
/home/jenkins/workspace/spark-master-compile-sbt-scala-2.10/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/expressions.scala:439:
Cannot check match for unreachability.
[error] (The analysis required more space than allowed. Please try with
scalac -Dscalac.patmat.analysisBudget=512 or
-Dscalac.patmat.analysisBudget=off.)
[error] [warn] CleanupAliases(plan.transformUp {
[error] [warn]
java.lang.RuntimeException: 2 fatal warnings
at scala.sys.package$.error(package.scala:27)
at SparkBuild$$anonfun$sharedSettings$18.apply(SparkBuild.scala:333)
at SparkBuild$$anonfun$sharedSettings$18.apply(SparkBuild.scala:302)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
at sbt.std.Transform$$anon$4.work(System.scala:63)
at
sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
at
sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
at sbt.Execute.work(Execute.scala:237)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
at
sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
[error] (catalyst/compile:compile) 2 fatal warnings
[error] Total time: 190 s, completed Nov 15, 2016 7:11:45 AM
Build step 'Execute shell' marked build as failure
Finished: FAILURE
```
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