[SPARK-8393][STREAMING] JavaStreamingContext#awaitTermination() throws non-declared InterruptedException

## What changes were proposed in this pull request?

`JavaStreamingContext.awaitTermination` methods should be declared as `throws[InterruptedException]` so that this exception can be handled in Java code. Note this is not just a doc change, but an API change, since now (in Java) the method has a checked exception to handle. All await-like methods in Java APIs behave this way, so seems worthwhile for 2.0.

## How was this patch tested?

Jenkins tests

Author: Sean Owen <sowen@cloudera.com>

Closes #12418 from srowen/SPARK-8393.

1 files changed, 1 insertions, 3 deletions

diff --git a/external/kinesis-asl/src/main/java/org/apache/spark/examples/streaming/JavaKinesisWordCountASL.java b/external/kinesis-asl/src/main/java/org/apache/spark/examples/streaming/JavaKinesisWordCountASL.java
index 0e43e9272d..d40bd3ff56 100644
--- a/external/kinesis-asl/src/main/java/org/apache/spark/examples/streaming/JavaKinesisWordCountASL.java
+++ b/external/kinesis-asl/src/main/java/org/apache/spark/examples/streaming/JavaKinesisWordCountASL.java
@@ -24,7 +24,6 @@ import java.util.List;
 import java.util.regex.Pattern;
 
 import com.amazonaws.regions.RegionUtils;
-import org.apache.log4j.Logger;
 import org.apache.spark.SparkConf;
 import org.apache.spark.api.java.function.FlatMapFunction;
 import org.apache.spark.api.java.function.Function2;
@@ -81,9 +80,8 @@ import com.amazonaws.services.kinesis.clientlibrary.lib.worker.InitialPositionIn
  */
 public final class JavaKinesisWordCountASL { // needs to be public for access from run-example
   private static final Pattern WORD_SEPARATOR = Pattern.compile(" ");
-  private static final Logger logger = Logger.getLogger(JavaKinesisWordCountASL.class);
 
-  public static void main(String[] args) {
+  public static void main(String[] args) throws Exception {
     // Check that all required args were passed in.
     if (args.length != 3) {
       System.err.println(