Emil Maskovsky b4745406da raft: Fix crash in leader_host API handler ...

The leader_host API handler was eventually using the `req` unique_ptr
after it has been already destroyed (passed down to the future lambda
by reference). This was causing an occassional crash in some tests.

Reworked the leader_host handler to use the req only outside of the
future lambda.

Also updated the code to handle the possibility that the non-default
leader group (other than Group 0) might reside on a different shard
than the shard 0 - using the same concept of calling on all shards via
`invoke_on_all()` as done for the other requests.

Fixes scylladb/scylladb#19714

(cherry picked from commit b2db8f4b9b)

Closes scylladb/scylladb#19742

2024-07-16 13:29:37 +02:00

3.3 KiB

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