diff --git a/spring-cloud-data-flow/apache-spark-job/pom.xml b/spring-cloud-data-flow/apache-spark-job/pom.xml
index 65a57671ea..a4816a30ba 100644
--- a/spring-cloud-data-flow/apache-spark-job/pom.xml
+++ b/spring-cloud-data-flow/apache-spark-job/pom.xml
@@ -22,16 +22,6 @@
             <groupId>org.apache.spark</groupId>
             <artifactId>spark-core_${scala.version}</artifactId>
             <version>${spark.version}</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>log4j</groupId>
-                    <artifactId>log4j</artifactId>
-                </exclusion>
-                <exclusion>
-                    <groupId>org.slf4j</groupId>
-                    <artifactId>slf4j-log4j12</artifactId>
-                </exclusion>
-            </exclusions>
         </dependency>
     </dependencies>
 
diff --git a/spring-cloud-data-flow/apache-spark-job/src/main/java/com/baeldung/spring/cloud/PiApproximation.java b/spring-cloud-data-flow/apache-spark-job/src/main/java/com/baeldung/spring/cloud/PiApproximation.java
index dfead21728..3f7c3be678 100644
--- a/spring-cloud-data-flow/apache-spark-job/src/main/java/com/baeldung/spring/cloud/PiApproximation.java
+++ b/spring-cloud-data-flow/apache-spark-job/src/main/java/com/baeldung/spring/cloud/PiApproximation.java
@@ -13,7 +13,7 @@ import java.util.stream.IntStream;
 
 public class PiApproximation {
     public static void main(String[] args) {
-        SparkConf conf = new SparkConf().setAppName("BaeldungPIApproximation");
+        SparkConf conf = new SparkConf().setAppName("BaeldungPIApproximation").setMaster("local[2]");
         JavaSparkContext context = new JavaSparkContext(conf);
         int slices = args.length >= 1 ? Integer.valueOf(args[0]) : 2;
         int n = (100000L * slices) > Integer.MAX_VALUE ? Integer.MAX_VALUE : 100000 * slices;
diff --git a/spring-cloud-data-flow/batch-job/pom.xml b/spring-cloud-data-flow/batch-job/pom.xml
index e11df0df8e..6b02b000e1 100644
--- a/spring-cloud-data-flow/batch-job/pom.xml
+++ b/spring-cloud-data-flow/batch-job/pom.xml
@@ -11,9 +11,8 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-boot-1</artifactId>
+        <artifactId>spring-cloud-data-flow</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-boot-1</relativePath>
     </parent>
 
     <dependencyManagement>
@@ -21,7 +20,7 @@
             <dependency>
                 <groupId>org.springframework.cloud</groupId>
                 <artifactId>spring-cloud-dependencies</artifactId>
-                <version>Brixton.SR5</version>
+                <version>Hoxton.SR4</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
@@ -31,8 +30,7 @@
     <dependencies>
         <dependency>
             <groupId>org.springframework.cloud</groupId>
-            <artifactId>spring-cloud-task-starter</artifactId>
-            <version>${spring-cloud-task-starter.version}</version>
+            <artifactId>spring-cloud-starter-task</artifactId>
         </dependency>
 
         <dependency>
@@ -48,7 +46,7 @@
     </dependencies>
 
     <properties>
-        <spring-cloud-task-starter.version>1.0.3.RELEASE</spring-cloud-task-starter.version>
+        <spring-cloud-task-starter.version>2.2.3.RELEASE</spring-cloud-task-starter.version>
     </properties>
 
 </project>
diff --git a/spring-cloud-data-flow/pom.xml b/spring-cloud-data-flow/pom.xml
index e2a0664f30..5b516146ae 100644
--- a/spring-cloud-data-flow/pom.xml
+++ b/spring-cloud-data-flow/pom.xml
@@ -9,8 +9,9 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-modules</artifactId>
-        <version>1.0.0-SNAPSHOT</version>
+        <artifactId>parent-boot-2</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-boot-2</relativePath>
     </parent>
 
     <modules>
diff --git a/spring-cloud-data-flow/spring-cloud-data-flow-etl/customer-mongodb-sink/pom.xml b/spring-cloud-data-flow/spring-cloud-data-flow-etl/customer-mongodb-sink/pom.xml
index 9fd378b171..43772505a4 100644
--- a/spring-cloud-data-flow/spring-cloud-data-flow-etl/customer-mongodb-sink/pom.xml
+++ b/spring-cloud-data-flow/spring-cloud-data-flow-etl/customer-mongodb-sink/pom.xml
@@ -9,9 +9,8 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-boot-2</artifactId>
+        <artifactId>spring-cloud-data-flow-etl</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../../parent-boot-2</relativePath>
     </parent>
 
     <dependencyManagement>
@@ -63,7 +62,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <spring-cloud.version>Greenwich.RELEASE</spring-cloud.version>
+        <spring-cloud.version>Hoxton.SR4</spring-cloud.version>
     </properties>
 
 </project>
diff --git a/spring-cloud-data-flow/spring-cloud-data-flow-etl/customer-transform/pom.xml b/spring-cloud-data-flow/spring-cloud-data-flow-etl/customer-transform/pom.xml
index fdec22f3b3..f0d18a1c4f 100644
--- a/spring-cloud-data-flow/spring-cloud-data-flow-etl/customer-transform/pom.xml
+++ b/spring-cloud-data-flow/spring-cloud-data-flow-etl/customer-transform/pom.xml
@@ -9,9 +9,8 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-boot-2</artifactId>
+        <artifactId>spring-cloud-data-flow-etl</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../../parent-boot-2</relativePath>
     </parent>
 
     <dependencyManagement>
@@ -55,7 +54,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <spring-cloud.version>Greenwich.RELEASE</spring-cloud.version>
+        <spring-cloud.version>Hoxton.SR4</spring-cloud.version>
     </properties>
 
 </project>
diff --git a/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/log-sink/pom.xml b/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/log-sink/pom.xml
index 02d572aeb7..186e5b1886 100644
--- a/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/log-sink/pom.xml
+++ b/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/log-sink/pom.xml
@@ -10,9 +10,8 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-boot-1</artifactId>
+        <artifactId>spring-cloud-data-flow-stream-processing</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../../parent-boot-1</relativePath>
     </parent>
 
     <dependencyManagement>
@@ -35,7 +34,7 @@
     </dependencies>
 
     <properties>
-        <spring-cloud-dependencies.version>Brixton.SR7</spring-cloud-dependencies.version>
+        <spring-cloud-dependencies.version>Hoxton.SR4</spring-cloud-dependencies.version>
     </properties>
 
 </project>
diff --git a/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/pom.xml b/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/pom.xml
index 5342049d73..e794287e10 100644
--- a/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/pom.xml
+++ b/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/pom.xml
@@ -2,6 +2,7 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
     <artifactId>spring-cloud-data-flow-stream-processing</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <name>spring-cloud-data-flow-stream-processing</name>
@@ -9,9 +10,8 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-modules</artifactId>
-        <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../../</relativePath>
+        <artifactId>spring-cloud-data-flow</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
     </parent>
 
     <modules>
@@ -21,5 +21,13 @@
         <module>time-processor</module>
         <module>log-sink</module>
     </modules>
+    
+    <dependencies>
+    <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
 
 </project>
diff --git a/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/time-processor/pom.xml b/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/time-processor/pom.xml
index f8db434423..b4ad84cfe9 100644
--- a/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/time-processor/pom.xml
+++ b/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/time-processor/pom.xml
@@ -10,9 +10,8 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-boot-1</artifactId>
+        <artifactId>spring-cloud-data-flow-stream-processing</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../../parent-boot-1</relativePath>
     </parent>
 
     <dependencyManagement>
@@ -35,7 +34,7 @@
     </dependencies>
 
     <properties>
-        <spring-cloud-dependencies.version>Brixton.SR7</spring-cloud-dependencies.version>
+        <spring-cloud-dependencies.version>Hoxton.SR4</spring-cloud-dependencies.version>
     </properties>
 
 </project>
diff --git a/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/time-source/pom.xml b/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/time-source/pom.xml
index 8194755814..05908d3c52 100644
--- a/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/time-source/pom.xml
+++ b/spring-cloud-data-flow/spring-cloud-data-flow-stream-processing/time-source/pom.xml
@@ -2,6 +2,7 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung.spring.cloud</groupId>
     <artifactId>time-source</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <name>time-source</name>
@@ -10,9 +11,8 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-boot-1</artifactId>
+        <artifactId>spring-cloud-data-flow-stream-processing</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../../parent-boot-1</relativePath>
     </parent>
 
     <dependencyManagement>
@@ -35,7 +35,7 @@
     </dependencies>
 
     <properties>
-        <spring-cloud-dependencies.version>Brixton.SR7</spring-cloud-dependencies.version>
+        <spring-cloud-dependencies.version>Hoxton.SR4</spring-cloud-dependencies.version>
     </properties>
 
 </project>
diff --git a/spring-cloud/spring-cloud-stream-starters/twitterhdfs/pom.xml b/spring-cloud/spring-cloud-stream-starters/twitterhdfs/pom.xml
index 1cfbf7e7c8..c9a73b9aa1 100644
--- a/spring-cloud/spring-cloud-stream-starters/twitterhdfs/pom.xml
+++ b/spring-cloud/spring-cloud-stream-starters/twitterhdfs/pom.xml
@@ -9,10 +9,10 @@
     <packaging>jar</packaging>
 
     <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-boot-1</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../../parent-boot-1</relativePath>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.1.13.RELEASE</version>
+        <relativePath /> 
     </parent>
 
     <dependencies>
@@ -32,6 +32,11 @@
             <groupId>javax.servlet</groupId>
             <artifactId>jstl</artifactId>
         </dependency>
+         <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
@@ -45,7 +50,7 @@
     </build>
 
     <properties>
-        <spring-cloud-starter-stream.version>1.3.1.RELEASE</spring-cloud-starter-stream.version>
+        <spring-cloud-starter-stream.version>2.1.2.RELEASE</spring-cloud-starter-stream.version>
     </properties>
 
 </project>
\ No newline at end of file