Updated based on code review.

* Guard adding incrementer to the job with the isUuiIdInstanceEnabled
* Set uuideInstanceEnabled to true by default since it is now the default incrementer

spring-cloud-dataflow-composed-task-runner/src/main/java/org/springframework/cloud/dataflow/composedtaskrunner/ComposedRunnerJobFactory.java

@@ -109,7 +109,9 @@ public Job getObject() throws Exception {
 						.start(createFlow())
 						.end())
 				.end();
-		builder.incrementer(new UuidIncrementer());
+		if(this.composedTaskProperties.isUuidInstanceEnabled()) {
+			builder.incrementer(new UuidIncrementer());
+		}
 		return builder.build();
 	}
 

spring-cloud-dataflow-composed-task-runner/src/main/java/org/springframework/cloud/dataflow/composedtaskrunner/properties/ComposedTaskProperties.java

@@ -191,10 +191,10 @@ public class ComposedTaskProperties {
 	/**
 	 * Allows a single ComposedTaskRunner instance to be re-executed without
 	 * changing the parameters. It does this by applying a {@code run.id} with a UUid.
-	 * Default is false.
+	 * Default is true.
 	 * Set this option to `true` when running multiple instances of the same composed task definition at the same time.
 	 */
-	private boolean uuidInstanceEnabled = false;
+	private boolean uuidInstanceEnabled = true;
 
 	/**
 	 * The platform property that will be used for each task in the workflow when it is launched.

spring-cloud-dataflow-composed-task-runner/src/test/java/org/springframework/cloud/dataflow/composedtaskrunner/properties/ComposedTaskPropertiesTests.java

@@ -66,7 +66,7 @@ void gettersAndSetters() throws URISyntaxException{
 		assertThat(properties.getDataflowServerPassword()).isEqualTo("bar");
 		assertThat(properties.getDataflowServerAccessToken()).isEqualTo("foobar");
 		assertThat(properties.isSkipTlsCertificateVerification()).isTrue();
-		assertThat(properties.isUuidInstanceEnabled()).isFalse();
+		assertThat(properties.isUuidInstanceEnabled()).isTrue();
 		properties.setUuidInstanceEnabled(true);
 		assertThat(properties.isUuidInstanceEnabled()).isTrue();
 	}