Can't undeploy with SDM?

Question

I've got a very strange problem with the SDM tool.  When I start it up and login, the 'SDM Repository' tab shows all the deployed modules.  However, when I click on the undeployment tab, I don't see any modules - in fact, the screen is completely blank.  If I try to click on the 'SDM Repository' tab again, it displays the various target systems and deployments, but I get the hourglass, with the message 'Loading flow file from server', and status 'Working' - at this point I can't click on any of the tabs, as it seems that the application has locked up.
I therefore can't undeploy any modules.  This is not good!
I have used the Undeployment feature before, so it was
working at one point.
Anyone have any suggestions?  I've perused all the SDM log files, but there are no errors in any of the files.  I've also done the standard Windows problem resolution technique - I've rebooted my server.  No effect.
Help!

Answer 1

My issue with undeploying via the SDM was related to multiple deployment descriptors in the SDM.
If the SDM is hanging when you attempt to undeploy, check the SDM log files, either at:
/usr/sap/<SID>/<instanceID>/work/jvm_sdm.out
or in the last SDM log in the directory
/usr/sap/<SID>/<instanceID>/SDM/program/log/
For an error like this:
"java.lang.IllegalStateException: More than one matching deployment for development component..."
or
"java.lang.IndexOutOfBoundsException: Index: X, Size: Y"
If you see errors like this, the SDM likely thinks there are multiple copies of a deployed component.
To determine the culprit, check the <DeploymentContainer> in the SDM repository at:
/usr/sap/<SID>/<INSTANCE>/SDM/program/config/sdmrepository.sdc
Search inside the <DeploymentID> tags for a component with value of 2 or greater. Remove all but the latest <DeploymentID> tag for the component, and restart the SDM. The component will now (hopefully) undeploy.
You can see SAP Note 824357 for more details on this solution too.
Thanks,
-- Alex