kafka

I was looking at some logs and for a cluster that has no lag and only a single host (which was alive at the time) I was seeing the following exception:

Unable to execute pull query. All nodes are dead or exceed max allowed lag.

The error message doesn't help me understand what happened, which partition failed or if there's some other issue. We should print more debugging information.

Current Behaviour

The flamegraph sorts the siblings in ascending order by frame's name.
The reference to code is here

Expected Behaviour

The siblings should appear in order of their start time.
This can be achieved according to library docs mentioned [here](https://github.com/spiermar/d3-fla

For an implementation of #126 (PostgreSQL driver with SKIP LOCKED), I create a SQL table for each consumer group containing the offsets ready to be consumed. The name for these tables is build by concatenating some prefix, the name of the topic and the name of the consumer group. In some of the test cases in the test suite, UUID are used for both, the topic and the consumer group. Each UUID has