Ceph » rgw

(this obviously has nothing to do with Ceph Devops...)

I'm looking at a similar problem with sts. If this is the same problem, then you are pretty-printing either json or xml. Both write a newline each time flush is called, which isn't counted into content-length. When curl reads this, there is a timing race. civetweb writes out the headers & the content as 2 sendto's. Curl reads the headers using a 16384 byte buffer, and then if that doesn't contain the content, does an additional read to fetch any remaining content. So if the 2nd sendto from civetweb happens fast enough, curl reads it all in at once, and objects to the extra newline from flush. If the 2nd sendto is slower, then the 2nd read will fetch the exact contents and the extra newline is never seen.