[SPARK-22094][SS] processAllAvailable should check the query state

## What changes were proposed in this pull request?

`processAllAvailable` should also check the query state and if the query is stopped, it should return.

## How was this patch tested?

The new unit test.

Author: Shixiong Zhu <zsxwing@gmail.com>

Closes #19314 from zsxwing/SPARK-22094.

sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/StreamExecution.scala

@@ -840,7 +840,7 @@ class StreamExecution(
         if (streamDeathCause != null) {
           throw streamDeathCause
         }
-        if (noNewData) {
+        if (noNewData || !isActive) {
           return
         }
       }

sql/core/src/test/scala/org/apache/spark/sql/streaming/StreamingQuerySuite.scala

@@ -640,6 +640,18 @@ class StreamingQuerySuite extends StreamTest with BeforeAndAfter with Logging wi
     }
   }
 
+  test("processAllAvailable should not block forever when a query is stopped") {
+    val input = MemoryStream[Int]
+    input.addData(1)
+    val query = input.toDF().writeStream
+      .trigger(Trigger.Once())
+      .format("console")
+      .start()
+    failAfter(streamingTimeout) {
+      query.processAllAvailable()
+    }
+  }
+
   /** Create a streaming DF that only execute one batch in which it returns the given static DF */
   private def createSingleTriggerStreamingDF(triggerDF: DataFrame): DataFrame = {
     require(!triggerDF.isStreaming)