Details
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Type:
Bug
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Status: Closed
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: 6.5.0, 6.6.0
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Fix Version/s: 6.6.1
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Component/s: couchbase-bucket
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Labels:
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Triage:Untriaged
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Story Points:1
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Is this a Regression?:No
Description
If the timing of a "seqno-ack" from consumer to producer is just right, it can find that the active vbucket has been deleted, the producer will respond to the consumer with "not-my-vbucket". The consumer will receive the response packet and error as follows:
WARNING 121: Unsupported response packet received with opcode: 0x61 (DCP_SEQNO_ACKNOWLEDGED)
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The error happens because "mcbp" has no response handler configured for this opcode. This forces a disconnect of replication, which will fail a rebalance.
Clearly from the code, a seqno-ack can generate a response and we should gracefully handle them to avoid unexpected disconnects and rebalance failure.
Attachments
| For Gerrit Dashboard: MB-42256 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 139100,2 | MB-42256: Handle seqno ack responses | master | kv_engine | Status: ABANDONED | 0 | 0 |
| 139108,6 | MB-42256: Handle seqno ack responses | mad-hatter | kv_engine | Status: MERGED | +2 | +1 |
| 140025,3 | Merge branch mad-hatter into master | master | kv_engine | Status: MERGED | +2 | +1 |
Activity
| Field | Original Value | New Value |
|---|---|---|
| Link | This issue causes CBSE-9110 [ CBSE-9110 ] |
| Fix Version/s | 6.6.1 [ 17002 ] |
| Is this a Regression? | Unknown [ 10452 ] | No [ 10451 ] |
| Assignee | Daniel Owen [ owend ] | Dave Rigby [ drigby ] |
| Assignee | Dave Rigby [ drigby ] | Ben Huddleston [ ben.huddleston ] |
| Link | This issue blocks MB-40528 [ MB-40528 ] |
| Labels | approved-for-6.6.1 |
| Assignee | Ben Huddleston [ ben.huddleston ] | Jim Walker [ jwalker ] |
| Resolution | Fixed [ 1 ] | |
| Status | Open [ 1 ] | Resolved [ 5 ] |
| Status | Resolved [ 5 ] | Closed [ 6 ] |
| Labels | approved-for-6.6.1 | approved-for-6.6.1 request-dev-verify |