how to use appcfg.py for google-app-engine projects created using google's eclipse plugin?

Question

I have created a google-app-engine java project in Eclipse using Google's Eclipse plugin. My previous attempt to deploy failed. Now, when I retry, I get the following message:

Unable to update app: Error posting to URL : http://appengine.google.com/api/appversion/create?app_id=mybdaywisherversion=1 409 conflict Another transaction for this user is already in progress for this app and major version. That user can undo the transaction with appcfg.py's "rollback" command.

Now, I have always used the google-app-engine features from inside Eclipse only and have not a clue how to run the appcfg.py command.

Could not get much help from documentation available over the internet. The only thing I could make out was for mac (I'm on mac), the command to be used is appcfg.sh. Inside Eclipse, I looked where App-Engine SDK is located on my machine and went to that location. Even found appcfg.sh there. But when I try to run it, it only reports the error "command not found". Tried various alternatives to run it (like tried running it with sudo, tried running it as ./appcfg.sh by going to whether its located) but no success

Can someone please tell me the step I will have to follow to run the apcfg command?

Answer 1

As the result of an Internal Server Error during app deployment, I am now left with a pending transaction, that I need to rollback before I can deploy again.

Creating staging directory Scanning for jsp files. Scanning files on local disk. Initiating update. java.io.IOException: Error posting to URL: 409 Conflict Another transaction by user is already in progress for this app and major version. That user can undo the transaction with appcfg.py's "rollback" command.

this was how I did it (all from the command line) which is a slightly simpler method, which achieved the same effect.....

C:\Documents and Settings\Amit\My Documents\newproject>"C:\Program Files\eclipse\plugins\com.google.appengine.eclipse.sdkbundle_1.2.5.v200909021031\appengine-java-sdk-1.2.5\bin\appcfg" rollback war

Reading application configuration data...

2009-09-17 20:47:35.859::INFO: Logging to STDERR via org.mortbay.log.StdErrLog Beginning server interaction for idebanet... 0% Rolling back the update. Success. Cleaning up temporary files...

C:\Documents and Settings\Amit\My Documents\newproject>

Courtesy:JOHN