Month: November 2013
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VirtualBox: Failed to delete the storage unit of the hard disk /PATH/HARD-DISK.vdi. Cannot close medium ‘/PATH/HARD-DISK.vdi’ because it has N child media.
After upgrading to VirtualBox 4.3.2 r90405, I get this dreaded error message when running VirtualBox:- I was able to clone the offending VDI and boot from the cloned VDI without losing any data. The cloning process took about half hour. Now, when I try to remove the offending VDI under Virtual Media Manager, I get… Read More…
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Backbone: model.destroy() Always Call “error” Callback Function
PROBLEM Let’s assume we invoke person.destroy() to delete a person:- … and let’s assume when person.destroy() is invoked, it will call /person/{personId} DELETE. Here’s how the Spring MVC controller API might look like:- When we execute person.destroy(), the error callback function will always get called even though the HTTP status is a 200 OK. Why?… Read More…