spring-messaging | Spring Messaging Book Source Code - Apress | Microservice library

We have an existing application which is working fine with the SpringBoot 2.2.2.RELEASE. Now we tried to upgrade it to the SpringBoot 2.4.2 version and application is not getting started and throws the following error. In the classpath I could see only one spring-webmvc-5.3.2.jar file.

Below is the pom.xml for the referance:

When starting Spring Boot 2.4.5 with spring-kafa, value.deserializer value is shown as StringDeserializer instead of KafkaAvroDeserializer:

Before anyone mark this as a duplicate, I referenced this stackoverflow question before posting here, I tried all solutions in that thread but still it is not working for me. I am migrating a legacy java project into spring boot application. When I start the server I am getting this stacktrace,

I was using this code block. But the getSessionAttributes() was showing error. I used library "spring-messaging.jar-4.0.0 Release". I found on their website that this function exists in this class. But the library I've used doesn't contain this class. How can this be solved? I cannot update the class file and add the function!

I am new to using application.properties and am struggling because Environment is always null. I have followed numerous examples such as the accepted answer shown on SO HERE; however, I keep getting the error message showing below. This is a Spring application and I know I don't actually need to go through this manual process per the article HERE. However, I have to show how to connect manually using the properties file. Where am I going wrong? Effectively, I want to hide my database credentials in application.properties and then read them into something like DriverManager.getConnection(env.getProperty("URL"), env.getProperty("USERNAME", env.getProperty("PASSWORD");

Attempting to use Environment:

I am trying to parse Debezium CDC message in Java using Jackson. But I am getting a cast exception, while doing the deserialisation. I am using generics as the object is dynamic, and will change over different kafka topic, as there is different topic for each table is MySQL.

Json input

I have a custom WebSocket handler (for a custom sub-protocol), registered the usual way:

At this moment I'm refactoring an app to use java's modular system and I'm stuck with an awkward situation while using org.apache.activemq:artemis-jms-client:jar:2.16.0:compile. I'm getting an error

I am running Apache Ignite .Net in a Kubernetes cluster on Linux nodes.

Recently I updated my ignite 2.8.1 cluster to v2.9. After the update some of the services being parts of the cluster fail to start up with the following message:

*** stack smashing detected ***: terminated

Interestingly, most often it happens with the 2nd instances of the same microservice. The first instances usually start up successfully (but sometimes the first instances fail, too). Another observation is that it happens to the nodes which publish Service Grid services. Sometimes a full cluster recycle (killing all the nodes then spinning them up again) helps to get all the nodes to start up, sometimes not.

Did I mess up something during the update? What should I check first of all?

Below is an excerpt from the Ignite log.