That said, it may not seem sensible to even accomplish that. I can not query the fresh builders as to the reasons it absolutely was done so ways, they’re not right here any more. Which project’s facts can only find out using their Git history.
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Configuring the brand new consumers
1 [ERROR] coffees.lang.IllegalStateException: Didn't weight ApplicationContext 2 3 Because of: org.springframework.beans.factory.BeanCreationException: Mistake creating bean having identity 'consumerFactory' outlined in group street financing [ de / software / config / KafkaConsumerConfig . class ]: cuatro 5 Caused by: java . lang . NullPointerException 6 at java . feet / java . util . concurrent . ConcurrentHashMap . putVal ( ConcurrentHashMap . java: 1011 ) 7 at java . base / java . util . concurrent . ConcurrentHashMap . init >( ConcurrentHashMap . java: 852 ) 8 at org . springframework . kafka . center . DefaultKafkaConsumerFactory . init >( DefaultKafkaConsumerFactory . java: 125 ) nine at org . springframework . kafka . core . DefaultKafkaConsumerFactory . init >( DefaultKafkaConsumerFactory . java: 98 ) 10 at de . app . config . KafkaConsumerConfig . consumerFactory ( AbstractKafkaConsumerConfig . java: 120 )
It turns out, we had been configuring the consumerConfigs bean and setting null values in its properties. The following change from HashMap to ConcurrentHashMap means we can no longer configure null values. We refactored our code and now tests are green. Easy-peasy.
Kafka texts which have JsonFilter
1 [ERROR] org .apache .kafka mon .mistakes .SerializationException : Can be 't serialize research [Skills [payload=MyClass(Id=201000000041600097, . ] getting procedure [my-topic] 2 3 Considering: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Do not manage PropertyFilter with id ‘myclassFilter' ; zero FilterProvider configured (due to source chain: de .attempt .Experiences [ "payload" ] ) 4 on com .fasterxml .jackson .databind .exc .InvalidDefinitionException .from (InvalidDefinitionException .java : 77 )
Some of our Java Beans use ato manipulate the serialization and deserialization. This requires a propertyFilter to be configured on the ObjectMapper.
Spring for Apache Kafka made a change to the JsonSerializer , introducing an ObjectWriter . When the ObjectWriter instance is created, the ObjectMapper configuration is copied, not referenced. Our test case was re-configuring the ObjectMapper with the appropriate propertyFilter after the ObjectWriter instance was created. Hence, the ObjectWriter didn't know anything about the propertyFilter (since the configuration was already copied). After some refactoring, changing how we create and configure the JsonSerializer , our test cases were green.
Running our build $ mvn clean verify finally resulted in a green build. Everything is working as it should. We pushed our changes to Bitbucket and everything built like a charm.
Coaching learned updating Springtime Kafka
Training read while in the Springtime Footwear posting
Spring and Spring Boot do a great job documenting their releases, their release notes are well maintained. That being said, upgrading was challenging, it took quite a while before everything was working again. A big part of that is on us, for not following best practices, guidelines, etc. A lot of this code was written when the team was just starting out with Spring and Spring Boot. Code evolves over time, without refactoring and applying those latest practices. Eventually that catches up with you, but we use this as a learning experience and improved things. Our test cases are now significantly better, and we'll keep a closer eye on them moving forward.