[TEST] Make randomNonNegativeLong() draw from a uniform distribution#27856
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DaveCTurner merged 1 commit intoelastic:masterfrom Dec 18, 2017
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bleskes
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Dec 17, 2017
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@elasticmachine please test again. CI failure looks unrelated, so I opened #27861 to investigate further. |
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@elasticmachine please test this again. |
DaveCTurner
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Currently randomNonNegativeLong() returns 0 half as often as any positive long, but random number generators are typically expected to return uniformly-distributed values unless otherwise specified. This fixes this issue by mapping Long.MIN_VALUE directly onto 0 rather than resampling.
martijnvg
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* es/6.x: (170 commits) Allow TrimFilter to be used in custom normalizers (#27758) recovery from snapshot should fill gaps (#27850) Remove unused class PreBuiltTokenFilters (#27839) Reject scroll query if size is 0 (#22552) (#27842) Mutes ‘Rollover no condition matched’ YAML test Make randomNonNegativeLong() draw from a uniform distribution (#27856) Adapt rest test after backport. Relates #27833 Handle case where the hole vertex is south of the containing polygon(s) (#27685) Move range field mapper back to core Fix publication of elasticsearch-cli to Maven Do not use system properties when building the HttpAsyncClient (#27829) Optimize version map for append-only indexing (#27752) Add NioGroup for use in different transports (#27737) adapt field collapsing skip test version. relates #27833 Add version support for inner hits in field collapsing (#27822) (#27833) Clarify that number of threads is set by packages Register HTTP read timeout setting Fixes Checkstyle Remove `operationThreaded` from Java API (#27836) Fixes failing BytesSizeValues tests ...
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Currently
randomNonNegativeLong()returns0half as often as any positivelong, but random number generators are typically expected to return uniformly-distributed values unless otherwise specified. This fixes this issue by mappingLong.MIN_VALUEdirectly onto0rather than resampling.Admittedly, any specific value is extraordinarily unlikely, so the bias that this PR fixes is undetectable in all practical senses. I doubt we've ever been round this loop more than once.