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OPERATIONAL DEFECT DATABASE
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Issue Status as of April 22, 2014 ISSUE SUMMARY Data definition commands, like creating or dropping databases, collections or indexes, will fail on a secondary if that secondary has a background index build in progress on the same collection. USER IMPACT The failure is silent and can lead to inconsistency between replica set members. WORKAROUNDS Building the index in the foreground avoids the issue. If users rely on background index builds, they should confirm that all index builds have completed before running any data definition commands. RESOLUTION The secondaries wait to apply the data definition commands if a background index build is in progress. AFFECTED VERSIONS Version 2.6.0 is affected by this bug. PATCHES The patch is included in the 2.6.1 production release.
xgen-internal-githook commented on Tue, 22 Apr 2014 16:07:39 +0000: Author: {u'username': u'milkie', u'name': u'Eric Milkie', u'email': u'milkie@10gen.com'} Message: SERVER-13620 fix assert codes to be the same as in 2.6 Branch: master https://github.com/mongodb/mongo/commit/3a613a84a4f9a22a70c387e67305dd1b486bae68 xgen-internal-githook commented on Mon, 21 Apr 2014 15:19:31 +0000: Author: {u'username': u'milkie', u'name': u'Eric Milkie', u'email': u'milkie@10gen.com'} Message: SERVER-13620 update fassert code Branch: v2.6 https://github.com/mongodb/mongo/commit/14e0ba91a9897018c6a0232eb25ab96f1c451a4f xgen-internal-githook commented on Mon, 21 Apr 2014 15:17:54 +0000: Author: {u'username': u'andy10gen', u'name': u'Andy Schwerin', u'email': u'schwerin@mongodb.com'} Message: SERVER-13620 When applying operations from the oplog, wait for background operations to complete as necessary. (cherry picked from commit 070d58c191ab626605bcdd45db2f7990faa46399) Conflicts: src/mongo/base/error_codes.err Branch: master https://github.com/mongodb/mongo/commit/53cfe8bd7ce31f0e67efcb0fa41a019f110f2a22 xgen-internal-githook commented on Mon, 21 Apr 2014 15:17:51 +0000: Author: {u'username': u'andy10gen', u'name': u'Andy Schwerin', u'email': u'schwerin@mongodb.com'} Message: SERVER-13620 Refactor background.h/cpp; add awaitNoBgOp methods. (cherry picked from commit 9ad97ac9fd08cf56d4e6c4bdb5c1b10085b9040c) Branch: master https://github.com/mongodb/mongo/commit/001b2c1ee301f814c4b9128b2f0ef1ee1354a4f1 xgen-internal-githook commented on Mon, 21 Apr 2014 15:17:49 +0000: Author: {u'username': u'andy10gen', u'name': u'Andy Schwerin', u'email': u'schwerin@mongodb.com'} Message: SERVER-13620 Make indexbg_drop.js expose the bug. (cherry picked from commit d4b1e9e2e5097ff777b69543183088fa1fbb0129) Branch: master https://github.com/mongodb/mongo/commit/9be380c23afdad4ab7c4b09762f2f3d95caf674f xgen-internal-githook commented on Mon, 21 Apr 2014 14:35:47 +0000: Author: {u'username': u'andy10gen', u'name': u'Andy Schwerin', u'email': u'schwerin@mongodb.com'} Message: SERVER-13620 When applying operations from the oplog, wait for background operations to complete as necessary. Branch: v2.6 https://github.com/mongodb/mongo/commit/070d58c191ab626605bcdd45db2f7990faa46399 xgen-internal-githook commented on Mon, 21 Apr 2014 14:35:45 +0000: Author: {u'username': u'andy10gen', u'name': u'Andy Schwerin', u'email': u'schwerin@mongodb.com'} Message: SERVER-13620 Refactor background.h/cpp; add awaitNoBgOp methods. Branch: v2.6 https://github.com/mongodb/mongo/commit/9ad97ac9fd08cf56d4e6c4bdb5c1b10085b9040c xgen-internal-githook commented on Mon, 21 Apr 2014 14:35:42 +0000: Author: {u'username': u'andy10gen', u'name': u'Andy Schwerin', u'email': u'schwerin@mongodb.com'} Message: SERVER-13620 Make indexbg_drop.js expose the bug. Branch: v2.6 https://github.com/mongodb/mongo/commit/d4b1e9e2e5097ff777b69543183088fa1fbb0129
e.g. in indexbg_drop.js, the drop doesn't actually take effect on the secondary. The drop command fails but we fail to notice the problem due to SERVER-13601