[squid-users] helperHandleRead: unexpected read

[499258179]

I just start learn squid, and i find a 
2019/11/01 00:06:14 kid1| helperHandleRead: unexpected read from timecheck
#Hlpr8, 3 bytes 'OK
'
2019/11/01 00:06:20 kid1| helperHandleRead: unexpected read from timecheck
#Hlpr6, 3 bytes 'OK
in my cache log, timecheck is my php auth for squid
I have follow questions,
1. what is helperHandleRead: unexpected read
2. how to fix this issue




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