I work on Docker with an oracle-xe-11g image. When I connect via ssh to Docker container, the connection is established immediately. But when I want to connect to oracle database using localhost:49162 ( port is forwarded to container's 1521 ) it will take about 15 - 25 seconds to open each connection.
It doesn't matter if I use JDBC connection or SQLDeveloper.
I have read that problem could be connected with DNS resolution, but I wasn't able to find any sufficient solution.
Slow DNS lookups
My hosts file:
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost
My resolv.conf:
search home
nameserver 62.179.1.60
nameserver 62.179.1.61
System version:
macOS Sierra 10.12.3.
Has someone faced similar issues?
In my case, When I followed the link you mentioned in the question, and in particular when I changed the first line of my /etc/hosts of my mac from:
127.0.0.1 localhost
to:
127.0.0.1 localhost Muhammads-MacBook-Pro.local
Where Muhammads-MacBook-Pro.local is the output of the command hostname
Then it worked fine.
Related
My mac won't connect to localhost, I've tried with Safari and Mozilla, so it's not the browser, I tried other solutions I found on the internet, I ping 127.0.0.1 and it works correctly, if I run dscacheutil -q host -a name localhost I get the following:
name: localhost
ipv6_address: ::1
name: localhost
ip_address: 127.0.0.1
If I run apachectl configtest I get Syntax OK.
I've also read that my /etc/hosts might have been corrupted, this is how it looks like:
##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost
# Added by Docker Desktop
# To allow the same kube context to work on the host and the container:
127.0.0.1 kubernetes.docker.internal
# End of section
I have no idea what else to try
EDIT: I'm trying to run an application (Hortonworks Sandbox) from a virtual machine (VirtualBox) in mac, I was advised to try port forwarding but this is what I see when I check the port forwarding in VirtualBox, seems like everything is in order:
I also tried to run Vagrant from VirtualBox and Mac couldn't connect to the localhost server when needed
I'm on a really strange situation.
I'm using MAMP and I can't access to my working directory from the 127.0.0.1.
When I'm using localhost instead of 127.0.0.1 it works because the localhost is redirected to the ::1 ipv6 address.
So, I can access to my local server only via ipv6.
I've tried to start a little server with Python and it doesn't work ( it works fine on my personal laptop using OSX El Captain ).
When I try with an other port than 80 it works but I need to use this port ..
It's not a conflict, when I'm running the Python server he is the only one to listen the port 80
Do you have an idea about this trouble ?
Why I can use the ipv6 local address only ?
I am running a RoR app on my local. I have some translations in my hosts file.
127.0.0.1 localhost
127.0.0.1 example.dev
127.0.0.1 www.example.dev
127.0.0.1 api.example.dev
They were working fine, until I updated my OS to 10.11.4. If I send ping request to www.example.dev, it seems to work fine. The IP it translates to is 127.0.0.1.
But when I visit www.example.dev in my web browser, it seems to ignore hosts file and ping DNS server for IP.
I am not sure how, but going to localhost in browser does translate to 127.0.0.1.
Dont know why but ive disabled my lookback adapter and ipv6 and now its working.
so in your host file disable these two items
# ::1 localhost
# fe80::1%lo0 localhost
Some fubar osx bug... I miss steve....
I came across this while searching for an answer to a similar problem and wanted to post my findings for anyone else in the same position.
As a team of three, we found that edits to my /etc/hosts file appeared to work, while editing the other two's host files seemingly did not. Upon further digging, we realized I was on OS X 10.10, while they were on newer versions.
We found, after trying about a million things, that additions to the hosts file in 10.11 and up apparently could not have more than one space between the IP and the domain, for example:
DID NOT WORK:
1.2.3.4 some.site.com
DID WORK:
1.2.3.4 some.site.com
After making this change, we immediately started seeing expected results without any cache clears, reboots, or otherwise.
The host you are overriding is resolving via IPV6. ::1 is the loopback address for IPV6 which is analogous to 127.0.0.1 in IPV4. Add the following entries as the last lines in your /etc/hosts file.
::1 localhost::1 www.example.dev
I've had my app running on localhost port 80 via nginx on my mac for quite awhile. Recently I did some software updates and was trying to run other apps on different ports and now I can't run my first app on localhost:80.
I've very confused on where to start but think this is a firewall issue based on the following:
Tims-MacBook-Pro-2:html TimPeterson$ telnet localhost 80
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying fe80::1...
telnet: connect to address fe80::1: Connection refused
Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
telnet: Unable to connect to remote host
pointing the browser to http://localhost gives this Oops! Google Chrome could not connect to localhost
thoughts?
you may want to run
apachectl configtest
first.
My problem was specific, but might help another user. On Mac OS go to system preferences/sharing and check your computer name/localhost name (click edit to see the localhost name). My computer was reset by Apple in a non-English speaking country. They stuck some of their language in my computer name (great idea!) and it broke the Cisco login to localhost
What worked for me was uncommenting the following line in my /etc/hosts file:
::1 localhost
I am a Glassfish newbie, though a Java and Unix veteran. I am running the shell script to install Java EE 6 SDK, including Glassfish 3 on my Mac.
bash-3.2# sh java_ee_sdk-6u4-unix.sh
Everything goes along fine until I get to the Domain Info screen. I am sticking with the default info (except for passwords):
Domain Name: domain1
Admin Port: 4848 <- I have verified with netstat that both ports are free
Http Port: 8080 <-
Username: admin
Password: xxxxxxxxxxxx
Service Name: domain1Service
+ Start domain after creation
When I click Next, I get 2 error dialogs that tell me the following:
Admin Port: Host name not found
Http Port: Host name not found
Does anyone know how to get past this?
I confirm, I correct the same problem by changing my hostname to localhost using the command line hostname localhost in linux.
Looks like something is wrong with your network config. Maybe your hosts file is missing the entry for localhost.
Check the file /private/etc/hosts for
127.0.0.1 localhost
You can also try to set your hostname with
sudo hostname localhost
The answer was relatively simple. I had to add the hostname configured with MacOS Settings as an alias for localhost into my /etc/hosts file. I'm not sure where MacOS keeps the host name. But the hostname command (i.e. gethostname) was returning 'airguitar', which is what Glassfish was trying to connect to. Since it wasn't in /etc/hosts, the hostname couldn't be found.
This is a problem that happens on many systems, It's happening on my linux as well. The solution is quite simple, as chuck almost got it.
Check your hosts file, on linux is under /etc/hosts. You'll probably have a file like this:
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
Check your hostname with the command hostname
[root#glassfish1 opt]# hostname
glassfish1
And add this host name to your hosts file like this:
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 glassfish1
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
this did the trick for me.