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Description of problem:
When using IPP/2.0 (from e.g. Fedora 19), a bug in the IPP writing code for 'collection' attribute types can cause incorrect data to be sent back in response to, for example, a printer attributes query.

In particular, the IPP data sent is shorter than the HTTP Content-Length header advertises, causing the IPP/2.0 client to wait for the rest of the data and, since it is not forthcoming, time out.

Version-Release number of selected component (if applicable):
cups-1.4.2-50.el6_4.4

How reproducible:
100%

Steps to Reproduce:
1.From Fedora 19: lpstat -h theserver/version=2.0 -s

Actual results:
60s delay for each IPP request.

Expected results:
No delay.

Created attachment 765612 [details]
cups-str3521.patch

This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated
in the current release, Red Hat is unable to address this
request at this time.

Red Hat invites you to ask your support representative to
propose this request, if appropriate, in the next release of
Red Hat Enterprise Linux.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2014-1388.html