Confluent Maven repository not working?
The file is available, since you can download it if you go to it directly: http://packages.confluent.io/maven/io/confluent/kafka-avro-serializer/3.1.1/kafka-avro-serializer-3.1.1.jar
You could try adding the -U flag to your maven command to force download of cached files.
The root of the repo isn't browsable which is why you are getting the message when browsing to http://packages.confluent.io/maven/
Needs to add confluent repositories in pom.xml
Please add below lines in the pom.xml
<repositories>
<repository>
<id>confluent</id>
<url>https://packages.confluent.io/maven/</url>
</repository>
</repositories>