When I try to connect to memcache using this code:
$memcache = new Memcache;
$memcache->connect('localhost', 11211) or die ("Could not connect");
The call dies with the "Could not connect" error, but if I use localhost's IP:
$memcache = new Memcache;
$memcache->connect('127.0.0.1', 11211) or die ("Could not connect");
It works! So what's my problem? Well, this new computer is the only development environment I've setup that's been sensitive to that difference. I'm not about to go changing the settings on any code for what seems to be a computer specific issue, but I can't figure out what could be causing this behaviour.
I'm running XP, memcached 1.2.4, and wampserver 2. I've checked the hosts file; it does have an entry for localhost, and the dns cache has been flushed... Any ideas?
Running "ping localhost", as Conspicuous Compiler suggested, revealed that localhost was resolving to ::1 rather than 127.0.0.1. This is the correct behaviour for a network using IPv6, but it was this that was confusing memcached. As I didn't require IPv6 at all, I uninstalled it;
Right-click on a Network Connection
> Properties > Highlight "Microsoft TCP/IP version 6" > Uninstall
All good again!
Please note; it may be that you can solve the issue less destructively by mapping ::1 to localhost as an entry in your hosts file. I didn't try it...
Related
Not really a question but already the answer. Just to save others from spending days on this task.
What I want to do
I want to extend the basic NextCloudPi image with some custom websites including PHP. For ease use of remote debugging I am using VSCode and Xdebug.
The Problem was
I can't get a SSH connection to my raspi from VSCode and therefore also PHP debugging didn't work. SSH connection to the raspi worked well with other tools (putty, PowerShell etc.). Also Xdebug was set properly on the raspi (according to phpinfo();). In the log of the ssh-plugin of VSCode the following error appeared:
Failed to set up socket for dynamic port forward to remote port 37399: Socket closed. Is the remote port correct?
Relevant Versions
NextCloudPi 1.36.3
Xdebug 3.0.4
VSCode 1.60.2 (RemoteSSH 0.65.8, PhpDebug 1.19.0)
The Solution is
After spending evenings of googling I found out that the TCP port forwarding of the raspi's SSH service has to be enabled which is not in the basic nextcloudpi-image. This thread gave me the final clue: VSCode Remote SSH Connection Failed
So just set in /etc/ssh/sshd_config AllowTcpForwarding to yes and everything should work as easy as described in all the manuals.
I recently installed Manjaro and followed this tutorial: https://snapcraft.io/install/wekan/manjaro to install wekan. Everything went slicker than snot. I registered an account no issues, open the weken webgui at port 8080 without issue, create new lists and cards fine, but when I go to open the cards I create the connection to 127.0.0.1 is refused. Although it doesn't specify a port, I assume this is a call to the mongodb at the default port 27017, but I also opened up 28017 in the firewall.
Although mongo definitely seems to have been installed since I can see it is running, I can't find a mongod*.conf file on the system to verify the default ports.
This is the first time I used “snap” to install anything, and because it all went so seamlessly I have no clue where to start looking to find the issue. Is there a utility in snap where I can find out exactly what was installed to support wekan (webserver, database, etc.) that I can start checking into as potentials sources of issue. Thks.
I have installed WAMP (Version 2.2 32 bit) on Windows XP SP 3. After installation, I get a "Unable to connect" message when I open localhost on Firefox.
Could someone point me to the direction of resolving this.
Have you also checked your HOSTS file
C:/windows/systems32/drivers/etc/hosts
It should have this line in it ( not commented )
127.0.0.1 localhost
If you see this line, without a comment
::1 localhost
either comment it out (add a # in col1) or remove it completely.
This is a IPV6 version of localhost and is not really required yet, but MS decided to be ready for IPV6 and add it to the hosts file.
Your WAMP Server might be offline. So,click on the Wamp icon in System tray and select 'Put Online'. Hope that ll resolve the problem .
The problem is perhaps too localized. Since I was trying it on Windowx XP Service Pack 3, and most new applications are probably giving up comprehensive support for Windows XP as its support is about to be dropped by Microsoft itself. A solution to the problem may not eventually exist.
I tried XAMPP and that worked for me.
I can easily connect to a remote MySQL server using the DBI module in my Perl scripts. However, when I try to use the same connection settings/properties from within a CGI script, the connection fails.
There are no helpful errors/warnings being logged either in the apache error log, or the browser, in spite of using
use CGI::Carp qw(warningsToBrowser fatalsToBrowser);
Strangely, the exact same script works fine when executed from the terminal. I also tried connecting the CGI script to the MySQL server on localhost, but without any success.
On the other hand, phpMyAdmin works great on the machine.
I'm using CentOS Release 5.8. I'm suspecting it is a system/priveleges issue with the apache user or anywhere else on the OS, but have hit a dead end.
Any pointers would be much appreciated!
Thanks a lot.
Edit: I'm using the following connection string
$dbh = DBI->connect($ds, $uname, $pwd,{RaiseError => 1 }) or die "$DBI::errstr Could not connect: $!<br>";
Fixed it. In case anyone not too familiar with Linux administration faces similar issue, here's what had happened. The security system 'selinux' on my CentOS machine was prohibiting the httpd to establish network connection to the remote MySQL server. It had to be explicitly enabled with the following command
setsebool -P httpd_can_network_connect=1
One can read more about selinux over here:
http://wiki.centos.org/HowTos/SELinux
Check what users you have set up in MySQL. If you're trying to connect across a network connection, you could have a problem with the host association for the user.
Try:
select host,user from mysql.user
I'm trying to do some local RDC testing using VirtualBox. The host is OSX.8, the VM is ubuntu, and VirtualBox is version 4.1.22.
The VM starts fine without any problems. I shut it down and choose "Enable Server" from the Remote Display section of the Display options and start again, and again it starts fine. Note that the port is left default and the authentication is "null".
I start Microsoft's RDC (v2.1.0) and type in 'localhost' and get: You were disconnected from the Windows-based computer because of network problems.
I try 127.0.0.1 and get the same error. Then I type in the IP of my (host) computer and get the same error. I know the loopback address avoids the firewall but I turned it off anyway and got the same error.
I get the same error whether I'm using NAT networking or bridged. What am I doing wrong?
I should note that this is a vanilla install of VirtualBox and I haven't added any extensions or guest additions or anything like that.
Seems I'm doing everything right. What am I missing? Thanks for the help!
Problem Solved! You have to install the "VirtualBox 4.1.22 Oracle VM VirtualBox Extension Pack" (available on the VB download page) to make RDC work. I wish it would tell you this when you click "enable server" but I guess that's asking too much. I hope this helps someone else.