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[BP 7.2.4] - XDCR - Handle rollback request during stream-end

Description

XDCR doesn't handle rollback requests during stream-end scenarios and never reinitializes DCP stream ([https://github.com/couchbase/kv_engine/blob/dc00b746e5f22cc408acd179239430cac66f2b17/docs/dcp/documentation/commands/stream-end.md?plain=1#L52[…]C12|https://github.com/couchbase/kv_engine/blob/dc00b746e5f22cc408acd179239430cac66f2b17/docs/dcp/documentation/commands/stream-end.md?plain=1#L52C4-L52C12])

Once stream-end with rollback flag is received for a vb, we are not able to get any mutations to be replicated for that vb anymore, unless the pipeline is restarted which causes the streams to reinitialize.

 

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Link to Log File, atop/blg, CBCollectInfo, Core dump

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Release Notes Description

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Activity

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Neil Huang January 3, 2024 at 6:35 PM

Release Notes
Problem Description: In low priority replications, it is possible for a Data Service stream to end temporarily and for XDCR to not handle it properly, leading to hung replication.
Resolution: Ensure XDCR restarts pipeline if a data service stream is ended to ensure replication continues.

Ayush Nayyar December 8, 2023 at 6:31 AM

Verified on 7.2.4-7045.

CB robot November 15, 2023 at 9:54 AM

Build couchbase-server-7.2.4-6981 contains goxdcr commit 2867947 with commit message:
: Restart main pipeline if stream-end is received in Dcp_Stream_Active state

CB robot November 15, 2023 at 9:54 AM

Build couchbase-server-7.2.4-6981 contains gomemcached commit c5cf30a with commit message:
: Populate flags for the stream-end uprEvent

Fixed
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Details

Assignee

Reporter

Is this a Regression?

Yes

Triage

Untriaged

Issue Impact

external

Story Points

Priority

Instabug

Open Instabug

PagerDuty

Sentry

Zendesk Support

Created November 14, 2023 at 6:44 AM
Updated March 21, 2025 at 2:48 AM
Resolved November 15, 2023 at 8:17 AM
Instabug