Mansi Khara created CASSSIDECAR-454:
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Summary: Sidecar should wake up immediately on the instance
receiving a phase signal instead of waiting for the discovery loop
Key: CASSSIDECAR-454
URL: https://issues.apache.org/jira/browse/CASSSIDECAR-454
Project: Sidecar for Apache Cassandra
Issue Type: Improvement
Reporter: Mansi Khara
UpdateRestoreJobHandler writes phase signals (STAGE_READY, IMPORT_READY) to the
DB and returns 200 with no further action, leaving the receiving instance idle
until its next discovery cycle (up to 5–10 minutes). For IMPORT_READY, inject
RestoreJobManagerGroup into UpdateRestoreJobHandler and call the existing
updateRestoreJob() immediately after the DB write — staged ranges will unblock
on the next RestoreProcessor tick (~1 second). For STAGE_READY, expose a
package-level processJobNow(RestoreJob) method on RestoreJobDiscoverer that
runs the same updateRestoreJob + processSidecarManagedJobMaybe sequence the
discovery loop already executes, and call it from UpdateRestoreJobHandler after
the DB write. Both calls are additive and safe to miss- the DB write remains
the durable source of truth.
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