16:[[48060054,{"by":"mittermayr","descendants":342,"id":48060054,"kids":[48065541,48061235,48066825,48067463,48060816,48063144,48061573,48065977,48060233,48065664,48164609,48066657,48061206,48065477,48063764,48060862,48060118,48060510,48066897,48068031,48068671,48061021,48072985,48069406,48065405,48076222,48065805,48066611,48060305,48062348,48074130,48071929,48073874,48061239,48143098,48078121,48060366,48066467,48065750,48069852,48071907,48067033,48060494,48061231,48076074,48064439,48072394,48068953,48066644,48066357,48068343,48076649,48066376,48071584,48110342,48069841,48066224,48061401,48071571,48094835,48075843,48061142,48076192,48079163,48075240,48067693,48061175,48067538,48067848,48171679,48135694,48067059,48106672,48060270,48140548,48060100,48066661,48061397,48068520],"score":476,"text":"I know what you're thinking... and I still can't believe it, but...

This morning, our database flagged a duplicate UUID (v4). I checked, thinking it may have been a double-insert bug or something, but no.

The original UUID was from a record added in 2025 (about a year ago), and today the system inserted a new document with a fresh UUIDv4 and it came up with the exact same one:

b6133fd6-70fe-4fe3-bed6-8ca8fc9386cd

We're using this:\nhttps://www.npmjs.com/package/uuid

I thought this is technically impossible, and it will never happen, and since we're not modifying the UUIDs in any way, I really wonder how that.... is possible!? We're literally only calling:

import { v4 as uuidv4 } from "uuid";

const document_id = uuidv4();

... and then insert into the database, that's it.

Additionally, the database only has about 15.000 records, and now one collision. Statistically... impossible.

Has that ever happened to anyone?! What in the...","time":1778227034,"title":"Ask HN: We just had an actual UUID v4 collision...","type":"story"}],[47975570,{"by":"whoishiring","descendants":578,"id":47975570,"kids":[48058073,48148373,48148597,48145258,48144991,48143381,48145398,48145380,48142819,48136886,48142158,48147280,48143272,48139891,48143287,48141212,48139479,48121058,48131732,48143122,48139239,48122137,48111796,48117207,48107453,48132790,48117776,48125336,48127015,48136076,48133163,48105462,48102977,48100359,48094239,48106980,48105945,48113575,48087065,48119435,48085299,48097459,48117358,48107555,48094719,48109662,48107561,48104137,48080570,48079123,48102145,47977417,47978940,47979268,48076301,48070836,48076860,47983946,48066294,48089745,47976147,48095777,47975916,48119799,48064442,48057502,48073159,48082188,47976450,48058034,48082294,48060269,48065322,48052157,48054667,47976083,48071912,47978055,48092786,48051197,48008789,48062706,48071916,47976150,48041934,48038628,48018672,48018831,48051950,48034971,48033790,48025153,48046470,48065778,48038812,48017147,48026386,48035050,48036716,48001374,48013405,48094356,48059583,48014170,48017236,48004366,48040897,48002058,48009940,48013476,48010223,47994643,48029230,48008501,48017853,48011629,48017871,48007795,48055392,48023033,48023043,47989534,47990517,48041223,47989504,47989523,47988512,48014477,48005979,47988187,48011341,48014546,47989545,48006503,48038861,48020189,47988488,47989493,47987762,47991982,48017859,48033264,48046263,47985001,48015449,47994604,47995142,47986235,47983437,48029153,47983813,48048009,48032910,48006001,48035003,47983483,48009687,47988976,48042130,48030074,48017754,47978882,48007215,48100867,47987636,47976260,48005030,47991520,48006005,47976110,48044748,47996218,48072158,47977690,47995164,47997006,48037486,47978436,47984583,48008611,47977194,48015460,47975662,47987782,48013555,47981763,47992511,47980355,47982380,47978818,47976925,47989667,47975590,47980426,48049084,47977937,47981479,47976589,48007508,47981134,48017420,48014887,47975599,47997175,47975722,48028984,48011768,47976771,48008930,48005479,48064456,47988885,47975580,47985934,47997192,47986354,47990529,47989678,47981452,47981982,47975852,48076452,47984230,47977175,47980757,48013483,48016446,47978232,47975881,47978196,48061093,47979471,47975578,47982014,48060194,48013600,48047267,48028497,47977501,47977921,47978412,47986932,47992631,48004888,47976704,47976745,47981973,47975631,48058992,48002296,47988301,48009079,47978603,47976676,47976218,48021378,47977015,47983546,47979221,47976801,47978546,47975624,47983279,47976101,47977949,47998436,47981755,47994916,48005333,47975703,47977779,47985683,47982782,48005771,47983034,47980731,47978266,47986842,47980651,47977777,48045487,48011696,48074449,47992289,47977353,47976591,47981716,48017072,47977508,48040060,47982637,48011756,47976156,48013469,47977752,47977613,48049338,47999271,47977425,47979917,47977137,47975724,47975635,47981934,47981541,47977829,47976152,48005305,47981383,48007406,47986470,48019830,47984561,47994603,47980035,47978344,48007589,48022222,48010155,48014149,48048727,47975838,47976934,48023530,47987418,47982737,47984212,47981293,47977533,48025486,47981677,47979974,47976363,47976165,47978394,48052917,47975636,47978143,48040023,48024725,47981058,48005813,48022485,47993207,47982884,47976620,47976203,47976826,47976506,47981510,48051015,47982129,48006014,47980439,47995197,47977775,48035220,47999920,48011599,47984626,48034861,47987266,47981469,47977559,47976429,48014791,47978610,47983519,47976633,47987684,47994067,47975591,47983541,48041658,47984459,47978310,47984217,47975612,47976311,47977006,48014396,47980235,48027815,48004713,47977169,47977304,48086029,47976459,48005290,48024519,47978371,48048683,47985104,47982525,48007051,47977674,47978653,47977751,48073948,47976784,47980735,48020129,47983729,48006016,48002170,47987441,47986272,47976638,47981375,47978417,48006304,47981867,48035173,47975594,47975970,47977485,47979866,48006017,47980210,47978454,48026672,48015756,47976420,47986019,48014588,48000159,47976764,48010285,48018796,48011566,47975985,47981077,47977456,47996446,48041855,47986075,48007869,48008316,47997927,48045409,47986482,47986472,48005100,48004466,47979835,47980803,47977648,47979305,47982438,48023798,48022597,47995218,47981114,47981526,47976843,48001342,48000492,47980335,48033103,47999588,47986728,47978661,48049768,47981448,47976697,47978017,47996098,47979919,47983619,47990142,47977429,48026543,48023926,47979125,47979090,47989719,47977374,47992264,47982485,47991538,47977656,47979074,47990336,47975576,47979841,47981975,48023030,47978517,48008050,47979116,47976669,48041751,47977389,47976187,48010510,47981747,47976879,47983170,47982923,47982698,47982316,47982114,47981717,47980580,47981380,48019143,47980954,47980337,47975577,47979110,47975616,47977282,48004895,47977649,48004176,47979751,48004897,47976522,48005027,47977913,47984733,47976758,47976080,47994249,47980029,47982825,47977966,47979473,47976710,47976926,47981675,47980978,47976164,47988283,47977841,47984481,47984942,47975840,47985647,47986389,47979579,47980782,48010608,47979759,47999863,47975978,47975969,47985110,47980137,47980600,47976830,47980693,47983323,47978694,47976277,47982596,47975961,47978155,47981049,47976712,47978011,47975950,48000793,47977680,48007456,47982155,47997301,47983325,48115969,47980182,47977839,48018008,47986399,47976608,47982679,47979876,48003623,47982081,48011331,47976885,47976035,47977837,47981903,47979236,48030443,47982629,47976012,47977712,47980247,47978622,47992962,47976355,47979824,47983145,47976952,47983127,48027634,48022843,48009510,48010896,47983235,48019531,47975593,47982897,47982657,47980871,47981690,47977983,48005856,47976470,47976256,48035135,47980881,47976230,47976387,48114979,48054275,47976723,47976570,47983565,47998522,47996806,48080101,48066702,47984081,48039781,48037363,47979002,47977489,48051039,48002159,48001536,48001426,48001087,48000888,48000882,48112416,48122474,48106035,48099877,48093166,48040332,48065333,48008398,48019404,48031341,48031380,47986938,48012091,48012683,48037483,47987487,47990999,47981667,47977693,48020151,47980173,48004920,48000771,47979879,47982999],"score":153,"text":"Share your information if you are looking for work. Please use this format:

  Location:\n  Remote:\n  Willing to relocate:\n  Technologies:\n  Résumé/CV:\n  Email:\n

\nPlease only post if you are personally looking for work. Agencies, recruiters, job boards,\nand so on, are off topic here.

Readers: please only email these addresses to discuss work opportunities.

Searchers: try https://nthesis.ai/public/hn-wants-to-be-hired, https://www.wantstobehired.com.","time":1777647607,"title":"Ask HN: Who wants to be hired? (May 2026)","type":"story"}],[32871856,{"by":"matthieurouif","descendants":14,"id":32871856,"kids":[32874247,32877882,32874013,32877492,32873623,32877428,32877736],"score":64,"time":1663361445,"title":"CoreML Benchmark for the iPhone 14 Pro","type":"story","url":"https://www.photoroom.com/tech/core-ml-performance-2022/"}],[28915382,{"by":"itsme-alan","descendants":40,"id":28915382,"kids":[28915516,28915514,28915579,28915523,28915612,28915509,28915517,28915633,28915569,28915526,28915555,28929752,28915694,28916744,28927522,28915589,28915570,28916827,28916241,28916541,28915600,28916432,28915615,28915621,28915637],"score":85,"time":1634624845,"title":"Polishing Cloth","type":"story","url":"https://www.apple.com/shop/product/MM6F3AM/A/polishing-cloth"}]]

user:	sqquima
created:	October 19, 2021
karma:	4