remoteURL parameter error cause  challenge cache not working,critical area consume to much time, which eventually lead to client manifest request timeout(90s) in massive(which i test 80 concurrent) concurrent manifest request situation.
remoteURL parameter error cause  challenge cache not working,critical area consume to much time, which eventually lead to client manifest request timeout(90s) in massive(which i test 80 concurrent) concurrent manifest request situation.

Signed-off-by: spacexnice <04bbe6dfac7bf21e4c3c947a4d22ab9100de3b7f@alibaba-inc.com>

harrisonfeng/distribution,thaJeztah/distribution,sadlil/distribution,docker/distribution,nwt/distribution,thaJeztah/distribution,sergeyfd/distribution,spacexnice/distribution,shyr/distribution,sergeyfd/distribution,huamai-io/distribution,shyr/distribution,cezarsa/distribution,miminar/distribution,RichardScothern/distribution,jzwlqx/distribution,mikebrow/distribution,vdemeester/distribution,konstruktoid/distribution,jwhonce/distribution,duglin/distribution,yuwaMSFT2/distribution,vdemeester/distribution,RichardScothern/distribution,jwhonce/distribution,cezarsa/distribution,yuwaMSFT2/distribution,sadlil/distribution,konnase/distribution,dmcgowan/distribution,mbentley/distribution,huamai-io/distribution,miminar/distribution,manoj535/distribution,duglin/distribution,jzwlqx/distribution,docker/distribution,dobril-stanga/distribution,dobril-stanga/distribution,spacexnice/distribution,dmcgowan/distribution,nwt/distribution,mikebrow/distribution,estesp/distribution,harrisonfeng/distribution,konnase/distribution,mbentley/distribution,manoj535/distribution,estesp/distribution,konstruktoid/distribution