Dont hard error when a logchunk already exists
Dont hard error when a logchunk already exists

wfxiang08/changes,bowlofstew/changes,dropbox/changes,wfxiang08/changes,dropbox/changes,bowlofstew/changes,wfxiang08/changes,dropbox/changes,dropbox/changes,bowlofstew/changes,wfxiang08/changes,bowlofstew/changes