Couchbase Server

ns_server is reusing tap names unsafely which causes data loss or inconsistency in replication when a node is removed and added back

Details

  • Type: Bug Bug
  • Status: Closed Closed
  • Priority: Blocker Blocker
  • Resolution: Fixed
  • Affects Version/s: 1.7.2, 1.8.0
  • Fix Version/s: 1.8.1
  • Component/s: ns_server
  • Security Level: Public

Description

screenshot attached

NOTE: we're converting this to main 'named tap issues' ticket.

So what's not safe about reusing named taps as of 1.8.0?

If something happened to destination node after tap was disconnected. And if that something affected data for vbuckets replicated as part of named tap, then subsequent reuse of named tap will incorrectly assume that we can continue sending stuff instead of re-negotiating which data needs to be resent.

Activity

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Farshid Ghods made changes -
Field Original Value New Value
Attachment Screen Shot 2011-10-19 at 5.23.19 PM.png [ 11766 ]
Farshid Ghods made changes -
Attachment Screen Shot 2011-10-19 at 11.25.13 PM.png [ 11768 ]
Aleksey Kondratenko made changes -
Assignee Farshid Ghods [ farshid ]
Farshid Ghods made changes -
Labels 1.7.2-release-notes 1.8.0-release-notes
Perry Krug made changes -
Component/s ns_server [ 10019 ]
Dipti Borkar made changes -
Fix Version/s 1.8.1 [ 10249 ]
Affects Version/s 1.8.0 [ 10248 ]
Affects Version/s 1.7.2 [ 10203 ]
Priority Major [ 3 ] Blocker [ 1 ]
Dipti Borkar made changes -
Link This issue blocks CBSE-114 [ CBSE-114 ]
Dipti Borkar made changes -
Assignee Farshid Ghods [ farshid ] Aleksey Kondratenko [ alkondratenko ]
Fix Version/s 1.8.1 [ 10295 ]
Aleksey Kondratenko made changes -
Summary ns_server doesn't shut down rebalance tap streams when user stops rebalance ns_server is reusing tap names unsafely
Description screenshot attached screenshot attached

NOTE: we're converting this to main 'named tap issues' ticket.

So what's not safe about reusing named taps as of 1.8.0?

If something happened to destination node after tap was disconnected. And if that something affected data for vbuckets replicated as part of named tap, then subsequent reuse of named tap will incorrectly assume that we can continue sending stuff instead of re-negotiating which data needs to be resent.
Dipti Borkar made changes -
Labels 1.7.2-release-notes 1.8.0-release-notes next_sprint
Dipti Borkar made changes -
Labels next_sprint current_sprint
Dipti Borkar made changes -
Labels current_sprint next_sprint
Dipti Borkar made changes -
Sprint Priority 7
Aleksey Kondratenko made changes -
Status Open [ 1 ] Resolved [ 5 ]
Resolution Fixed [ 1 ]
Farshid Ghods made changes -
Summary ns_server is reusing tap names unsafely ns_server is reusing tap names unsafely which causes data loss or inconsistency in replication when a node is removed and added back
Farshid Ghods made changes -
Labels next_sprint 1.8.1-release-notes
Matt Ingenthron made changes -
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Dipti Borkar made changes -
Fix Version/s 1.8.2 [ 10249 ]
Farshid Ghods made changes -
Status Resolved [ 5 ] Closed [ 6 ]

People

  • Assignee:
    Aleksey Kondratenko
    Reporter:
    Farshid Ghods
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Dates

  • Created:
    Updated:
    Resolved: