diff --git a/.gitignore b/.gitignore
index 7b448f6cb0..87b9545954 100644
--- a/.gitignore
+++ b/.gitignore
@@ -105,4 +105,8 @@ spring-boot-modules/spring-boot-properties-3/*.log
 .sdkmanrc
 
 # Localstack
-**/.localstack
\ No newline at end of file
+**/.localstack
+
+#libraries-2
+libraries-2/employee*
+libraries-2/src/test/resources/crawler4j/**
\ No newline at end of file
diff --git a/libraries-2/pom.xml b/libraries-2/pom.xml
index ea1b2ca8b6..3f6f787f31 100644
--- a/libraries-2/pom.xml
+++ b/libraries-2/pom.xml
@@ -16,15 +16,7 @@
         <repository>
             <id>jboss-public-repository-group</id>
             <name>JBoss Public Repository Group</name>
-            <url>http://repository.jboss.org/nexus/content/groups/public/</url>
-            <releases>
-                <enabled>true</enabled>
-                <updatePolicy>never</updatePolicy>
-            </releases>
-            <snapshots>
-                <enabled>true</enabled>
-                <updatePolicy>daily</updatePolicy>
-            </snapshots>
+            <url>https://repo.maven.apache.org/maven2</url>
         </repository>
     </repositories>
 
@@ -82,6 +74,12 @@
             <groupId>edu.uci.ics</groupId>
             <artifactId>crawler4j</artifactId>
             <version>${crawler4j.version}</version>
+            <exclusions>
+                <exclusion>
+                    <groupId>com.sleepycat</groupId>
+                    <artifactId>je</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <dependency>
             <groupId>com.github.jknack</groupId>
@@ -119,22 +117,27 @@
             <artifactId>spring-jdbc</artifactId>
             <version>${spring.version}</version>
         </dependency>
+        <dependency>
+            <groupId>com.sleepycat</groupId>
+            <artifactId>je</artifactId>
+            <version>18.3.12</version>
+        </dependency>
     </dependencies>
 
     <properties>
-        <mapdb.version>3.0.7</mapdb.version>
-        <classgraph.version>4.8.28</classgraph.version>
-        <jbpm.version>6.0.0.Final</jbpm.version>
-        <picocli.version>3.9.6</picocli.version>
-        <chronicle.map.version>3.17.2</chronicle.map.version>
+        <mapdb.version>3.0.8</mapdb.version>
+        <classgraph.version>4.8.153</classgraph.version>
+        <jbpm.version>7.1.0.Final</jbpm.version>
+        <picocli.version>4.7.0</picocli.version>
+        <chronicle.map.version>3.24ea1</chronicle.map.version>
         <crawler4j.version>4.4.0</crawler4j.version>
-        <spring-boot-starter.version>2.1.4.RELEASE</spring-boot-starter.version>
-        <mesos.library.version>0.28.3</mesos.library.version>
+        <spring-boot-starter.version>2.7.8</spring-boot-starter.version>
+        <mesos.library.version>1.11.0</mesos.library.version>
         <parallel-collectors.version>1.1.0</parallel-collectors.version>
-        <handlebars.version>4.1.2</handlebars.version>
-        <jasperreports.version>6.17.0</jasperreports.version>
-        <spring.version>5.1.9.RELEASE</spring.version>
-        <hsqldb.version>2.5.0</hsqldb.version>
+        <handlebars.version>4.3.1</handlebars.version>
+        <jasperreports.version>6.20.0</jasperreports.version>
+        <spring.version>5.3.25</spring.version>
+        <hsqldb.version>2.7.1</hsqldb.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/libraries-2/src/test/java/com/baeldung/parallel_collectors/ParallelCollectorsUnitTest.java b/libraries-2/src/test/java/com/baeldung/parallel_collectors/ParallelCollectorsUnitTest.java
index adc753a8ad..e1ad2f7537 100644
--- a/libraries-2/src/test/java/com/baeldung/parallel_collectors/ParallelCollectorsUnitTest.java
+++ b/libraries-2/src/test/java/com/baeldung/parallel_collectors/ParallelCollectorsUnitTest.java
@@ -40,7 +40,7 @@ public class ParallelCollectorsUnitTest {
         List<Integer> ids = Arrays.asList(1, 2, 3);
 
         CompletableFuture<List<String>> results = ids.stream()
-          .collect(parallelToList(i -> fetchById(i), executor, 4));
+          .collect(parallelToList(ParallelCollectorsUnitTest::fetchById, executor, 4));
 
         System.out.println(results.join());
     }
@@ -52,7 +52,7 @@ public class ParallelCollectorsUnitTest {
         List<Integer> ids = Arrays.asList(1, 2, 3);
 
         List<String> results = ids.stream()
-          .collect(parallelToList(i -> fetchById(i), executor, 4))
+          .collect(parallelToList(ParallelCollectorsUnitTest::fetchById, executor, 4))
           .join();
 
         System.out.println(results); // [user-1, user-2, user-3]
@@ -92,7 +92,7 @@ public class ParallelCollectorsUnitTest {
         List<Integer> ids = Arrays.asList(1, 2, 3);
 
         ids.stream()
-          .collect(parallel(i -> fetchByIdWithRandomDelay(i), executor, 4))
+          .collect(parallel(ParallelCollectorsUnitTest::fetchByIdWithRandomDelay, executor, 4))
           .forEach(System.out::println);
     }
 
@@ -103,7 +103,7 @@ public class ParallelCollectorsUnitTest {
         List<Integer> ids = Arrays.asList(1, 2, 3);
 
         ids.stream()
-          .collect(parallelOrdered(i -> fetchByIdWithRandomDelay(i), executor, 4))
+          .collect(parallelOrdered(ParallelCollectorsUnitTest::fetchByIdWithRandomDelay, executor, 4))
           .forEach(System.out::println);
     }
 
@@ -114,7 +114,7 @@ public class ParallelCollectorsUnitTest {
         List<Integer> ids = Arrays.asList(1, 2, 3);
 
         Map<Integer, String> results = ids.stream()
-          .collect(parallelToMap(i -> i, i -> fetchById(i), executor, 4))
+          .collect(parallelToMap(i -> i, ParallelCollectorsUnitTest::fetchById, executor, 4))
           .join();
 
         System.out.println(results); // {1=user-1, 2=user-2, 3=user-3}
@@ -127,7 +127,7 @@ public class ParallelCollectorsUnitTest {
         List<Integer> ids = Arrays.asList(1, 2, 3);
 
         Map<Integer, String> results = ids.stream()
-          .collect(parallelToMap(i -> i, i -> fetchById(i), TreeMap::new,  executor, 4))
+          .collect(parallelToMap(i -> i, ParallelCollectorsUnitTest::fetchById, TreeMap::new,  executor, 4))
           .join();
 
         System.out.println(results); // {1=user-1, 2=user-2, 3=user-3}
@@ -140,7 +140,7 @@ public class ParallelCollectorsUnitTest {
         List<Integer> ids = Arrays.asList(1, 2, 3);
 
         Map<Integer, String> results = ids.stream()
-          .collect(parallelToMap(i -> i, i -> fetchById(i), TreeMap::new, (s1, s2) -> s1,   executor, 4))
+          .collect(parallelToMap(i -> i, ParallelCollectorsUnitTest::fetchById, TreeMap::new, (s1, s2) -> s1,   executor, 4))
           .join();
 
         System.out.println(results); // {1=user-1, 2=user-2, 3=user-3}
diff --git a/pom.xml b/pom.xml
index 4016d669a4..ea69fc7570 100644
--- a/pom.xml
+++ b/pom.xml
@@ -387,7 +387,6 @@
 
                 <!-- <module>lagom</module> --> <!-- Not a maven project -->
                 <module>language-interop</module>
-                <module>libraries-2</module>
                 <module>libraries-3</module>
                 <module>libraries-data</module>
 
@@ -670,7 +669,6 @@
 
                 <!-- <module>lagom</module> --> <!-- Not a maven project -->
                 <module>language-interop</module>
-                <module>libraries-2</module>
                 <module>libraries-3</module>
                 <module>libraries-data</module>
 
@@ -1074,6 +1072,7 @@
                 <module>tensorflow-java</module>
                 <module>xstream</module>
                 <module>webrtc</module>
+				<module>libraries-2</module>
             </modules>
 
             <properties>
@@ -1275,6 +1274,7 @@
                 <module>tensorflow-java</module>
                 <module>xstream</module>
                 <module>webrtc</module>
+				<module>libraries-2</module>
             </modules>
 
             <properties>