Will Li

@moscowart It's very reproduce-able for me.(happens on every call I tried) Now even if I call /bestsellers, this is what I got ``` {"id":"08de5b0b-dcf6-4933-b9e4-55e282e2562d","recommendation":[["sku1349",22453],["sku1349",22448],["sku1349",22248],["sku1349",22212],["sku1349",22163],["sku1349",22066],["sku1349",22034],["sku1349",21992],["sku1349",21983],["sku1349",21951],["sku1349",21855],["sku1349",21785],["sku1349",21768],["sku1349",21764],["sku1349",21732],["sku1349",21728],["sku1349",21726],["sku1349",21717],["sku1349",21656],["sku1349",21588],["sku1349",21548],["sku1349",21497],["sku1349",21376],["sku1349",21362],["sku1349",21304],["sku1349",21294],["sku1349",21279],["sku1349",21183],["sku1349",21166],["sku1349",21075],["sku1349",21035],["sku1349",20999],["sku1349",20980],["sku1349",20961],["sku1349",20902],["sku1349",20900],["sku1349",20897],["sku1349",20884],["sku1349",20872],["sku1349",20859],["sku1349",20801],["sku1349",20781],["sku1349",20771],["sku1349",20759],["sku1349",20735],["sku1349",20726],["sku1349",20657],["sku1349",20623],["sku1349",20581],["sku1349",20566],["sku1349",20521],["sku1349",20509],["sku1349",20493],["sku1349",20490],["sku1349",20476],["sku1349",20449],["sku1349",20440],["sku1349",20417],["sku1349",20332],["sku1349",20327],["sku1349",20324],["sku1349",20282],["sku1349",20271],["sku1349",20256],["sku1349",20239],["sku1349",20186],["sku1349",20158],["sku1349",20053],["sku1349",20048],["sku1349",20034],["sku1349",20030],["sku1349",20028],["sku1349",20007],["sku1349",20005],["sku1349",19997],["sku1349",19933],["sku1349",19928],["sku1349",19923],["sku1349",19908],["sku1349",19887],["sku1349",19859],["sku1349",19808],["sku1349",19742],["sku1349",19676],["sku1349",19670],["sku1349",19650],["sku1349",19636],["sku1349",19631],["sku1349",19603],["sku1349",19593],["sku1349",19579],["sku1349",19535],["sku1349",19522],["sku1349",19507],["sku1349",19486],["sku1349",19454],["sku1349",19452],["sku1349",19427],["sku1349",19400],["sku1349",19354]]} ``` It appears that the ItemID...

So I set all parallel hint to 1 but still see this issue with only a small set of data. I looks at your code and have some question about...

Yes, after I changed all calls to be blocking, the duplicate ids are gone. However, it's getting into this performance (scalability) issue. The event processing of Item-item-similarity typically takes 30...