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PODeleting app_offline during TFS 2010 build
 

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  1. PODeleting app_offline during TFS 2010 build
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    <p>I have a custom TFS Build process for my Web Application Project, which also does a publish. To accomplish this I attempt to delete the current publish location before copying over the compiled sources from the build. </p> <p>This works (most of the time) except when files are locked because there are people accessing the site, generally not a problem since most of the time the builds happen when no-one is access them (as these are purely development and QA builds).</p> <p>To try and fix those edge cases where the publish directory can't be deleted, I copy an app_offline.htm file to the directory and wait 4 seconds before trying to delete the rest of the site. This works and I haven't gotten any errors from this step however, when I try to delete the app_offline.htm after the publish is finished. I get the following error:</p> <blockquote> <p>Cannot cancel the workflow. Agent needs to be restarted. Details: The operation could not be performed because WorkflowApplication f670d4fb-d9e3-4f33-bc3d-925faa925e04 is aborted.</p> </blockquote> <p>The delete is created using a custom CodeActivity (since TFS Workflow doesn't have a delete).</p> <pre><code>public sealed class DeleteFile : CodeActivity { // Define an activity input argument of type string [RequiredArgument] public InArgument&lt;string&gt; File { get; set; } public InArgument&lt;int?&gt; Tries { get; set; } // If your activity returns a value, derive from CodeActivity&lt;TResult&gt; // and return the value from the Execute method. protected override void Execute(CodeActivityContext context) { // Obtain the runtime value of the Text input argument int tries = Tries.Get(context) ?? 1; for (int i = 0; i &lt; tries; i++) { try { System.IO.File.Delete(File.Get(context)); break; } catch (System.IO.IOException) { if (i == tries - 1) throw; Thread.Sleep(TimeSpan.FromSeconds(4)); } } } } </code></pre> <p>I added the "Tries" argument later to try and catch what was causing this error.</p> <p>However, of note, when viewing the log, the error above is not placed under the DeleteFile activity, but only at the top of the log and there are no other errors or warnings.</p> <p>Lastly, our tfsbuild user has delete permissions on the publish directory (it has no issues deleting the rest of the directory just app_offline.htm</p>
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