SharePoint Deployment Error: A deployment or retraction is already under way for the solution “abc.wsp”, and only one deployment or retraction at a time is supported

Sometimes this error pops out from the SharePoint Services Administration command when the user does retract a solution or deploy a solution like the following: stsadm -o retractsolution -name “%PackageName%” -local -url %TargetWebUrl% Or stsadm -o deploysolution -name “%PackageName%” -local -allowGacDeployment -url %TargetWebUrl% Error: “A deployment or retraction is already under way for…

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