Stefan Podkowinski created CASSANDRA-13459:
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Summary: Diag. Events: Native transport integration
Key: CASSANDRA-13459
URL: https://issues.apache.org/jira/browse/CASSANDRA-13459
Project: Cassandra
Issue Type: Sub-task
Components: CQL
Reporter: Stefan Podkowinski
Assignee: Stefan Podkowinski
Events should be consumable by clients that would received subscribed events
from the connected node. This functionality is designed to work on top of
native transport with minor modifications to the protocol standard (see
[original
proposal|https://docs.google.com/document/d/1uEk7KYgxjNA0ybC9fOuegHTcK3Yi0hCQN5nTp5cNFyQ/edit?usp=sharing]
for further considered options). First we have to add another value for
existing event types. Also, we have to extend the protocol a bit to be able to
specify a sub-class and sub-type value. E.g. {{DIAGNOSTIC_EVENT(GossiperEvent,
MAJOR_STATE_CHANGE_HANDLED)}}. This still has to be worked out and I'd
appreciate any feedback.
There will also be a CLI tool shipped with Cassandra that enables users to dump
events as JSON to stdout. This very simple tool will make use of a patched
Python client driver that will work with the new {{DIAGNOSTIC_EVENT}} native
transport event type.
Invocation will simply look something like this {{./diagview event_class ..}}.
See attached diag.log for example json output produced by starting and stopping
another node.
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