Problem with helloworld - socket.gaierror: (-2, 'Name or service not known')

[harijay]

Hi I downloaded the zip file and went through the helloworld example.
However when I try to run the simple example I get the following error
( see below) . I am looking to start playing with app-engine. ANy
ideas why I get this error.
Any help will be much appreciated
harijay


hari@localhost ~ $ google_appengine/dev_appserver.py helloworld/
INFO 2008-06-10 19:06:58,962 appcfg.py] Server:
appengine.google.com
INFO 2008-06-10 19:06:58,983 appcfg.py] Checking for updates to
the SDK.
INFO 2008-06-10 19:06:59,111 appcfg.py] The SDK is up to date.
WARNING 2008-06-10 19:06:59,111 datastore_file_stub.py] Could not
read datastore data from /tmp/dev_appserver.datastore
WARNING 2008-06-10 19:06:59,112 datastore_file_stub.py] Could not
read datastore data from /tmp/dev_appserver.datastore.history
Traceback (most recent call last):
File "google_appengine/dev_appserver.py", line 50, in <module>
execfile(script_path, globals())
File "/home/hari/google_appengine/google/appengine/tools/
dev_appserver_main.py", line 351, in <module>
sys.exit(main(sys.argv))
File "/home/hari/google_appengine/google/appengine/tools/
dev_appserver_main.py", line 330, in main
require_indexes=require_indexes)
File "/home/hari/google_appengine/google/appengine/tools/
dev_appserver.py", line 2645, in CreateServer
return BaseHTTPServer.HTTPServer((serve_address, port),
handler_class)
File "/usr/lib/python2.5/SocketServer.py", line 330, in __init__
self.server_bind()
File "/usr/lib/python2.5/BaseHTTPServer.py", line 101, in
server_bind
SocketServer.TCPServer.server_bind(self)
File "/usr/lib/python2.5/SocketServer.py", line 341, in server_bind
self.socket.bind(self.server_address)
File "<string>", line 1, in bind
socket.gaierror: (-2, 'Name or service not known')


I contents of the helloworld.py are
hari@localhost ~ $ vi helloworld/helloworld.py
print 'Content-Type: text/plain'
print ''
print 'Hello, world!'

And the app.yaml file has

hari@localhost ~ $ vi helloworld/app.yaml
application: helloworld
version: 1
runtime: python
api_version: 1

handlers:
- url: /.*
script: helloworld.py

[harijay]

I Solved this problem- but I dont understand why the solution worked-
If anyone can shed light on this that will be much appreciated

Symptom:

File "/usr/lib/python2.5/SocketServer.py", line 341, in server_bind
> self.socket.bind(self.server_address)
> File "<string>", line 1, in bind
> socket.gaierror: (-2, 'Name or service not known')

Solution
I had a faulty entry in my /etc/hosts file
127.0.0.1 transcode.homelinux.org
Instead of
127.0.0.1 localhost

I now have the following entries
127.0.0.1 localhost
::1 localhost
192.168.1.155 transcode.homelinux.org transcode

And now the dev_appserver connects fine .

Thought I would post this here so it helps someone else-
Harijay

[Nicolas Chauvat]

On Wed, Jun 11, 2008 at 05:59:05AM -0700, harijay wrote:
> File "/usr/lib/python2.5/SocketServer.py", line 341, in server_bind
> > self.socket.bind(self.server_address)
> > File "<string>", line 1, in bind
> > socket.gaierror: (-2, 'Name or service not known')

> ...

> I had a faulty entry in my /etc/hosts file
> 127.0.0.1 transcode.homelinux.org
> Instead of
> 127.0.0.1 localhost

if self.server_address == 'localhost' and name localhost can not be
resolved, there is no way for the socket to find what IP address it is
supposed to bind to.