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feat(ha-wal-replication): standby WAL ACK reply (tasks 3.1-3.3)

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Standby sends WalAckReply via xce_reply after each successfully
applied WAL entry. ha_apply_wal_catchup_entry signature extended
with endpoint_t* and cluster_t* parameters. walackreplymsg union
arm added to RequestReply capnp schema and xce_reply_t. Error
entries skip ACK. Dispatch gate test confirms OPCode_walCatchupEntry
allowed in CTRL_STANDBY/ELECTING/INIT.

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Rongsong Shen 2026-06-10 09:14:25 +00:00
parent 81dbc4d7b4
commit 566c91cd8b
8 changed files with 304 additions and 60 deletions
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3
src/schema/controller.capnp
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@ -560,6 +560,7 @@ struct RequestReply $C.mapname("xce_reply_t"){
ctrlhelloreplymsg @13: CtrlHelloReply;
requestvotereplymsg @14: RequestVoteReply;
stateReportMsg @15: StateReport $C.mapname("state_report"); # heartbeat reply: standby state
walackreplymsg @16: WalAckReply $C.mapname("walackreplymsg"); # WAL apply ACK from standby
}
redirectHost @11: Text $C.mapname("redirect_host");
@ -626,6 +627,8 @@ struct Request $C.mapname("xce_request_t"){
heartbeatmsg @25: HeartbeatMsg;
ctrlhellomsg @26: CtrlHelloRequest;
requestvotemsg @27: RequestVoteRequest;
walcatchupentrymsg @28: WalCatchupEntry;
snapshottransfermsg @29: SnapshotTransfer;
}
}