I want to synchronize the data in MySQL to PieCloudDB for data analysis. Does PieCloudDB offer native support for using Apache Flink as a data synchronization tool? Are there any specific configurations or plugins that need to be set up within PieCloudDB to enable Flink?

I am new to Apache Flink.

Basically, we have a lower environment cluster that we are using for multiple environments [Dev, QA, STG]. So I have deployed the Flink Kubernetes Operator 1.8 in a Flink Namespace, then the first JobManager in flink-dev namespace, a second one in a flink-qa namespace, and the last one in the flink-stg namespace. The only way I can get the JobManagers to work is to remove the high-availability annotations. If I add the high-availability annotations, I am getting the error further below:

Out of blue, I found the Java class generated out of an Avro schema stop working. Flink complains “Expecting type to be a PojoTypeInfo” for the generated class. Dig a little deeper, I discovered that a class must first be recognized a POJO type first, then a AvroTypeInfo can be derived.

I have a flink app, in which I want to listen to checkpoint/savepoint creation events. How do I do that?

Flink standalone mode, Flink task completed running, temporary files deleted, but disk space not reclaimed, lsof shows occupied by jobmanager process
[enter image description here](https://i.stack.imgur.com/JYlXw.png)