Details
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Bug
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Status: Closed
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Minor - P4
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Resolution: Fixed
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None
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None
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Fully Compatible
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ALL
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0
Description
We've seen a few failures of this test on the 2.6 branch:
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planCacheListQueryShapes() = { "shapes" : [ ], "ok" : 1 }
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planCacheListQueryShapes() = { "shapes" : [ ], "ok" : 1 }
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planCacheListQueryShapes() = {
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"shapes" : [
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{
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"query" : {
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"a" : 2,
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"b" : 2
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},
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"sort" : {
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},
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"projection" : {
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}
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}
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],
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"ok" : 1
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}
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assert: [0] != [1] are not equal : unexpected number of query shapes in plan cache
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Error: [0] != [1] are not equal : unexpected number of query shapes in plan cache
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at Error (<anonymous>)
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at doassert (src/mongo/shell/assert.js:11:14)
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at Function.assert.eq (src/mongo/shell/assert.js:38:5)
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at /data/mci/shell/src/jstests/core/plan_cache_ties.js:36:8
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My hypothesis is that it is 2.6-only test flakiness due to the contribution of NEED_FETCH to plan ranking. NEED_FETCH has been removed in master. Extra debug info is needed in order to confirm this hypothesis.