[DOCS-6377] Initial sync is not compatible between 2.6.5/6/7 and 3.0 running WiredTiger Created: 15/Oct/15  Updated: 11/Jan/17  Resolved: 24/Feb/16

Status: Closed
Project: Documentation
Component/s: Server
Affects Version/s: None
Fix Version/s: 01112017-cleanup

Type: Bug Priority: Major - P3
Reporter: Andrew Ryder (Inactive) Assignee: Kay Kim (Inactive)
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Related
is related to SERVER-17087 Add listCollections command functiona... Closed
Participants:
Days since reply: 8 years, 6 weeks, 3 days ago

 Description   

RE: http://docs.mongodb.org/manual/release-notes/3.0-upgrade/#downgrade-limitations

We call out the limitation in various compatibility problems with builds earlier than 2.6.5, however I don't think this goes far enough. Due to SERVER-17087, if a 2.6.5 (or 2.6.6, or 2.6.7) member is re-sync'ed from a 3.0 member running WiredTiger, the initial sync might report success but be fatally broken (it will have copied exactly one instruction in this circumstance, almost everything else is not copied). The initial sync has a good chance of total (and noisy) failure though.

I believe the first working version of 2.6 that can sync from a 3.0 member, regardless of options, is 2.6.8.



 Comments   
Comment by Githook User [ 04/Jan/16 ]

Author:

{u'username': u'Boomtime', u'name': u'Boomtime', u'email': u'andrew.ryder@10gen.com'}

Message: Update fact-3.0-downgrade-path.rst

DOCS-6377 final agreed change
HELP-1450 for discussion
SERVER-17087 for the danger

Signed-off-by: kay <kay.kim@10gen.com>
Branch: v3.0
https://github.com/mongodb/docs/commit/1c12473ad73a1831b51335d325e92574e296aa18

Comment by Githook User [ 04/Jan/16 ]

Author:

{u'username': u'Boomtime', u'name': u'Boomtime', u'email': u'andrew.ryder@10gen.com'}

Message: Update fact-3.0-downgrade-path.rst

DOCS-6377 final agreed change
HELP-1450 for discussion
SERVER-17087 for the danger

Signed-off-by: kay <kay.kim@10gen.com>
Branch: master
https://github.com/mongodb/docs/commit/1a64ae9aaa5ce702c5e1b9f286482e93a330f064

Comment by Ramon Fernandez Marina [ 15/Oct/15 ]

http://docs.mongodb.org/manual/release-notes/3.0-upgrade/#change-replica-set-storage-engine-to-wiredtiger

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