GAE - Unable to update: com.google.appengine.tools.admin.HttpIoException: - google-app-engine

Question

I tried to upload my test gwt app but I've just faced a quite strange error. Every time I try to upload app I get this:
Unable to update app: Error posting to URL:
https://appengine.google.com/api/appversion/create?app_id=gwttestapp001&version=1.0&
500 Internal Server Error
Server Error (500) A server error has occurred.
See the deployment console for more details Unable to update app:
Error posting to URL:
https://appengine.google.com/api/appversion/create?app_id=gwttestapp001&version=1.0&
500 Internal Server Error
Server Error (500) A server error has occurred.
... console says this
Skipping GWT compilation since no relevant changes have occurred since
the last deploy. Created staging directory at:
'C:\DOCUME~1\1\LOCALS~1\Temp\appcfg4973998929980348825.tmp' Scanning
for jsp files. Scanning files on local disk. Initiating update.
com.google.appengine.tools.admin.HttpIoException: Error posting to
URL:
https://appengine.google.com/api/appversion/create?app_id=gwttestapp001&version=1.0&
500 Internal Server Error
Server Error (500) A server error has occurred.
Debugging information may be found in C:\Documents and
Settings\1\Local Settings\Temp\appengine-deploy1308974562331110258.log
... and error log says this:
Unable to update: com.google.appengine.tools.admin.HttpIoException:
Error posting to URL:
https://appengine.google.com/api/appversion/create?app_id=gwttestapp001&version=1.0&
500 Internal Server Error
Server Error (500) A server error has occurred.
at
com.google.appengine.tools.admin.AbstractServerConnection.send1(AbstractServerConnection.java:281)
at
com.google.appengine.tools.admin.AbstractServerConnection.send(AbstractServerConnection.java:234)
at
com.google.appengine.tools.admin.AbstractServerConnection.post(AbstractServerConnection.java:213)
at
com.google.appengine.tools.admin.AppVersionUpload.send(AppVersionUpload.java:606)
at
com.google.appengine.tools.admin.AppVersionUpload.beginTransaction(AppVersionUpload.java:414)
at
com.google.appengine.tools.admin.AppVersionUpload.doUpload(AppVersionUpload.java:122)
at
com.google.appengine.tools.admin.AppAdminImpl.doUpdate(AppAdminImpl.java:328)
at
com.google.appengine.tools.admin.AppAdminImpl.update(AppAdminImpl.java:52)
at
com.google.appengine.eclipse.core.proxy.AppEngineBridgeImpl.deploy(AppEngineBridgeImpl.java:265)
at
com.google.appengine.eclipse.core.deploy.DeployProjectJob.runInWorkspace(DeployProjectJob.java:144)
at
org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
I just updated GAE from 1.5.2 to 1.6.2 but the error keeps going :(
How to fix it?

Answer 1

Well... I had to make my own research of this kind of problem deeper on...
So I guess I finally found the problem root :S The thing is in my app version syntax;
My appengine-web.xml file was containing
<?xml version="1.0" encoding="UTF-8"?>
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
<application>gwttestapp001</application>
<version>1.0</version>
</appengine-web-app>
... but according to tutorial I found the thing is "there is no way to use dots" in version spelling so I changed the content to
<?xml version="1.0" encoding="UTF-8"?>
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
<application>gwttestapp001</application>
<version>1</version>
</appengine-web-app>
... and all uploaded successfully :)
I hope that tip saves ones day

Answer 2

Solution to this can be like, as it worked for me:
properties starts
<appengine.app.version>10</appengine.app.version>
<appengine.target.version>1.8.7</appengine.target.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
properties ends
configuration starts
<version>${appengine.app.version}</version>
configuration ends
In configuration label, write version as that in properties label as above. Hope this will help.