Aleksey Yeschenko created CASSANDRA-10198:
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Summary: 3.0 hints should be streamed on decomission
Key: CASSANDRA-10198
URL: https://issues.apache.org/jira/browse/CASSANDRA-10198
Project: Cassandra
Issue Type: Bug
Reporter: Aleksey Yeschenko
Assignee: Marcus Eriksson
Fix For: 3.0.0 rc1
CASSANDRA-6230 added all the necessary pieces in the initial release, but
streaming itself didn't make it in time.
Now that hints are stored in flat files, we cannot just stream hints sstables.
Instead we need to handoff hints files.
Essentially we need to rewrite {{StorageService::streamHints}} to be
CASSANDRA-6230 aware.
{{HintMessage}} and {{HintVerbHandler}} can already handle hints targeted for
other nodes (see javadoc for both, it's documented reasonably).
{{HintsDispatcher}} also takes hostId as an argument, and can stream any hints
to any nodes.
The building blocks are all there - we just need
{{StorageService::streamHints}} to pick the optimal candidate for each file and
use {{HintsDispatcher}} to stream the files.
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