error

[root@localhost log]# grep 'level":"error' master.log | tail
{"level":"error","ts":1695737323.375936,"msg":"failed to load item categories","error":"redis: can't parse array/set/push reply: \":0\""}
{"level":"error","ts":1695737543.5134308,"msg":"failed to get popular items","error":"redis: can't parse array/set/push reply: \":0\""}
{"level":"error","ts":1695738226.3970337,"msg":"failed to load item categories","error":"redis: can't parse array/set/push reply: \":0\""}
{"level":"error","ts":1695738823.6536405,"msg":"failed to get popular items","error":"strconv.ParseFloat: parsing \"阿根廷_闲置\": invalid syntax"}
{"level":"error","ts":1695739374.974211,"msg":"failed to get popular items","error":"redis: can't parse array/set/push reply: \":0\""}
{"level":"error","ts":1695740169.7526777,"msg":"failed to load item categories","error":"redis: can't parse array/set/push reply: \":0\""}
{"level":"error","ts":1695740383.5786047,"msg":"failed to get popular items","error":"redis: can't parse array/set/push reply: \":0\""}
{"level":"error","ts":1695740466.7466474,"msg":"failed to get popular items","error":"redis: can't parse array/set/push reply: \":0\""}
{"level":"error","ts":1695740916.29292,"msg":"failed to load item categories","error":"redis: can't parse array/set/push reply: \":0\""}
{"level":"error","ts":1695741971.2368662,"msg":"failed to searching neighbors of items","error":"redis: nil","errorVerbose":"redis: nil\ngithub.com/zhenghaoz/gorse/master.(*Master).findItemNeighborsIVF.func4:505: \ngithub.com/zhenghaoz/gorse/base/parallel.DynamicParallel:124: \ngithub.com/zhenghaoz/gorse/master.(*Master).findItemNeighborsIVF:519: "}