error loading DBConnectionVerification.jar

[#1]

I know I have a proxy issue some where but in order to find the issue I need to understand the flow. how does this jar file gets downloaded to a node from ambari server ? The log for testing the "hive" module from ambari console ,is not giving any detail and just that its couldn't download this jar file.

its some kind of localized proxy issue since other operations worked fine so far .

MYSQL connection error 

2017-06-16 21:27:10,803 - Error downloading DBConnectionVerification.jar from Ambari Server resources. Check network access to Ambari Server.
HTTP Error 504: Gateway Timeout

[#2]

hi Jay

but as I have shown that the "no_proxy" variable is defined in my /etc/environment file but wget is not using it .

I also tried adding the no_proxy variable to the wgetrc file but didn't help.

[root@hadoop1 etc]# grep proxy /etc/wgetrc
#https_proxy = http://proxy.yoyodyne.com:18023/
#http_proxy = http://proxy.yoyodyne.com:18023/
#ftp_proxy = http://proxy.yoyodyne.com:18023/
https_proxy = http://dotatofwproxy.tolls.dot.state.fl.us:8080/
http_proxy = http://dotatofwproxy.tolls.dot.state.fl.us:8080/
no_proxy=".tolls.do.state.fl.us,hadoop1.tolls.dot.state.fl.us,hadoop1"

so how can I get wget to use the no_proxy variable?

[#3]

@Sami Ahmad

Try using the file name as "$USER_HOME/.wgetrc"

Wget initialization file can reside inside the following files:
1. "/usr/local/etc/wgetrc" (global, for all users) 
(OR) 
2. $HOME/.wgetrc (for a single user).
<strong></strong>

You can try defining the entry of no_proxy inside the "$HOME/.wgetrc" file. "no_proxy"to use string as the comma-separated list of domains to avoid in proxy loading, instead of the one specified in environment.

Please see:

[0] https://www.gnu.org/software/wget/manual/html_node/Sample-Wgetrc.html

[1] https://www.gnu.org/software/wget/manual/html_node/Wgetrc-Location.html

[2] https://www.gnu.org/software/wget/manual/html_node/Proxies.html

.

[#4]

I put a .wgetrc file in root login folder but still wget is trying to access proxy.. its not taking the "no_proxy" variable setting.

[root@hadoop1 ~]# pwd
/root
[root@hadoop1 ~]# grep proxy .wgetrc
https_proxy = http://dotatofwproxy.tolls.dot.state.fl.us:8080/
http_proxy = http://dotatofwproxy.tolls.dot.state.fl.us:8080/
no_proxy=".tolls.do.state.fl.us,hadoop1.tolls.dot.state.fl.us,hadoop1"
# If you do not want to use proxy at all, set this to off.
#use_proxy = on

[#5]

found the solution , on web all info about no_proxy settings for Centos is incorrect. what worked for me was removing the ~.wgetrc file and putting the following file in place .

issue is that wget is not taking the no_proxy settings from .wgetrc file, but if I define it on the system level it picks it up.

/etc/profile.d/proxy.sh

export http_proxy="http://dotatofwproxy.tolls.dot.state.fl.us:8080/"
export https_proxy="https://dotatofwproxy.tolls.dot.state.fl.us:8080/"
export ftp_proxy="ftp://dotatofwproxy.tolls.dot.state.fl.us:8080/"
export no_proxy=".tolls.dot.state.fl.us,hadoop1,hadoop2,hadoop3,hadoop4,hadoop5"