rhn-plugin is using system proxy for connetting to rhn

Happens on different version of redhat/Centos (>5.5, >6.3)


How reproducible:

Setup a system proxy and see that yum / up2date / osad can't work anymore

Steps to Reproduce:

1. setup a system proxy

vim /etc/profile.d/proxy.sh

export http_proxy="http://10.102.43.53:3128"
export HTTP_PROXY="http://10.102.43.53:3128"
export no_proxy="spacewalk.foosoft.it,localhost,127.0.0.1,10.102.43.0/24"
export NO_PROXY="spacewalk.foosoft.it,localhost,127.0.0.1,10.102.43.0/24"


2. apply this setting system wide

source /etc/profile.d/proxy.sh

3. try to contact spacewalk.foosoft.it (10.102.43.250) for "yum update" or else
 

 Error: Cannot retrieve repository metadata (repomd.xml) for repository: production-rhel5. Please verify its path and try again


4. see the strace

read(12, "SQLite format 3\0\4\0\1\1\0@  \0\0\0\23\0\0\0/"..., 100) = 100
stat("/var/cache/yum/production-rhel5/repomd.xml", 0x7fff20ae0990) = -1 ENOENT (No such file or directory)
open("/var/cache/yum/production-rhel5", O_RDONLY|O_NONBLOCK|O_DIRECTORY) = 13
fcntl(13, F_SETFD, FD_CLOEXEC)          = 0
getdents(13, /* 4 entries */, 32768)    = 112
getdents(13, /* 0 entries */, 32768)    = 0
close(13)                               = 0
stat("/var/cache/yum/production-rhel5/repomd.xml", 0x7fff20ae0990) = -1 ENOENT (No such file or directory)
open("/dev/urandom", O_RDONLY)          = 13
read(13, "\360\225\326\320^\302m-\341.x\221\202\241\351k", 16) = 16
close(13)                               = 0
lstat("/var/cache/yum/production-rhel5/repomdvgTeWQtmp.xml", 0x7fff20ae0810) = -1 ENOENT (No such file or directory)
open("/usr/share/rhn/RHN-ORG-TRUSTED-SSL-CERT", O_RDONLY) = 13
fstat(13, {st_mode=S_IFREG|0664, st_size=5188, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b587d00c000
read(13, "Certificate:\n    Data:\n        V"..., 4096) = 4096
read(13, "rJFUVs+ciZRvx2KailrcQAhIkURtgTA/"..., 4096) = 1092
read(13, "", 4096)                      = 0
close(13)                               = 0
munmap(0x2b587d00c000, 4096)            = 0
socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 13
fcntl(13, F_GETFL)                      = 0x2 (flags O_RDWR)
fcntl(13, F_SETFL, O_RDWR|O_NONBLOCK)   = 0
connect(13, {sa_family=AF_INET, sin_port=htons(3128), sin_addr=inet_addr("10.102.43.53")}, 16) = -1 EINPROGRESS (Operation now in progress)
select(14, NULL, [13], NULL, {60, 0})   = 1 (out [13], left {60, 0})
connect(13, {sa_family=AF_INET, sin_port=htons(3128), sin_addr=inet_addr("10.102.43.53")}, 16) = 0
select(14, NULL, [13], NULL, {60, 0})   = 1 (out [13], left {60, 0})
sendto(13, "GET http://spacewalk.foosoft.it/"..., 438, 0, NULL, 0) = 438


5. see that rhn-plugin is trying to use system proxy (10.102.43.53) which is different from the proxy defined in /etc/yum.conf (X:Y:Z:K:3128)

6. see that /etc/sysconfig/rhn/up2date does not have a defined proxy because we don't need a proxy for RHN here

7. see that no_proxy and NO_PROXY are defined but are ignored ( wget does honour them)

8. erase the system proxy:

export http_proxy=""
export HTTP_PROXY=""

9. now everthing is working


Actual results:

if a system wide proxy is defined there's no way to contact rhn repo without using the same proxy 

Expected results:

if up2date proxy is not defined, rhn-plugin is supposed to contact directly the FQDN defined in serverURL in /etc/sysconfig/rhn/up2date, so it's supposed to ignore system wide proxy (export http_proxy= .... and export HTTP_PROXY= ...) and proxy defined in /etc/yum.conf ( proxy=http://10.102.XX.YY:3128 )


Additional info:

Please correct me if I am wrong, I'm pretty sure that everthing was working before upgrade to 1.9 (i.e. 1.8 was working as stated)