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From Sean Owen <>
Subject Re: Spark tests hang on local machine due to "testGuavaOptional" in JavaAPISuite
Date Wed, 11 Mar 2015 00:13:12 GMT
Yes and I remember it was caused by ... well something related to the
Guava shading and the fact that you're running a mini cluster and then
talking to it. I can't remember what exactly resolved it but try a
clean build. Somehow I think it had to do with multiple assembly files
or something like that.

On Wed, Mar 11, 2015 at 12:09 AM, Ganelin, Ilya
<> wrote:
> Hi all – building Spark on my local machine with build/mvn clean package test runs
until it hits the JavaAPISuite where it hangs indefinitely. Through some experimentation,
I’ve narrowed it down to the following test:
> /**
>  * Test for SPARK-3647. This test needs to use the maven-built assembly to trigger the
>  * since that's the only artifact where Guava classes have been relocated.
>  */
> @Test
> public void testGuavaOptional() {
>   // Stop the context created in setUp() and start a local-cluster one, to force usage
of the
>   // assembly.
>   sc.stop();
>   JavaSparkContext localCluster = new JavaSparkContext("local-cluster[1,1,512]", "JavaAPISuite");
>   try {
>     JavaRDD<Integer> rdd1 = localCluster.parallelize(Arrays.asList(1, 2, null),
>     JavaRDD<Optional<Integer>> rdd2 =
>       new Function<Integer, Optional<Integer>>() {
>         @Override
>         public Optional<Integer> call(Integer i) {
>           return Optional.fromNullable(i);
>         }
>       });
>     rdd2.collect();
>   } finally {
>     localCluster.stop();
>   }
> }
> If I remove this test, things work smoothly. Has anyone else seen this? Thanks.
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