Category Archives: App Development

Kafka Connect – Externalizing Secrets – KIP 297

Kafka Connect – Externalizing Secrets – KIP 297 In order to connect with a data source or sink, we need to use credentials. Kafka Connect added support for specifying credential using config providers. The support for file config provider is available with the installation package. This is discussed in KIP 297. The KIP was released… Continue reading »

Kafka Tools – kafkacat – non-JVM Kafka producer / consumer

Kafka Tools – kafkacat – non-JVM Kafka producer / consumer

Kafka Tools – kafkacat – non-JVM Kafka producer / consumer kafkacat is an amazing kafka tool based on librdkafka library, which is a C/C++ library for kafka. It means that it doesn’t have dependency on JVM to work with kafka data as administrator. It can be used to consume and produce messages from kafka topics…. Continue reading »

Kafka Tools – kafka-delete-records

Kafka Tools – kafka-delete-records While working with kafka we, sometimes, need to purge records from a topic. This is specially needed in a development environment where we just want to get rid of some records and want to keep the other ones. Previously we have discussed how we can purge all records from a topic… Continue reading »

Confluent Hub Client

Confluent Hub Client Confluent Hub is an online repository for extensions and components for Kafka. Kafka is based on extensible model for many of its services. It allows plug-ins and extensions which makes it generic enough to be suitable for many real world streaming based applications. They include both Confluent and 3rd party components. Generally,… Continue reading »

com.esotericsoftware.kryo.KryoException: Unusual solution upgrading Flink

com.esotericsoftware.kryo.KryoException: Unusual solution upgrading Flink While upgrading from Flink from 1.4 to a newer version 1.6.1, there are a few build issues. After we fix the issues, suddenly we started getting KryoException. Why are we getting this and how it this related to the upgrade? Let’s start with the exception message. If you try to… Continue reading »