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POCacheItemRemovedCallback causes webserver to crash
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  1. POCacheItemRemovedCallback causes webserver to crash
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    copied!<p>THis is an interesting question. I am developing a web-chat software piece and for the past couple of hours I've been trying to figure out why this happens. Basically, I add an actual chat object (the part that does communications) to the Cache collection when you start chatting. In order to detect that you closed the window, I set the sliding expiration to say 10-30 seconds. I also set the callback to let the chat client know that he needs to disconnect to end the chat session. For some odd reason, when I use the code to dispose of the chat client, whatever it is, it causes the entire w3svc process to crash (event log checked). I also tried just sending myself an email when the item is removed, which worked. I even tried to put the entire code in try-catch block but it seems to ignore that as well. Any ideas? O_o</p> <p><strong>UPD</strong>: No, i am not trying to refresh the object (<a href="http://blogs.msdn.com/b/yangxind/archive/2005/12/20/506151.aspx" rel="nofollow noreferrer">in reference to this</a>).</p> <p>Adding:</p> <pre><code>HttpContext.Current.Cache.Insert("ChatClient_" + targetCid + HttpContext.Current.Session.SessionID, cl, null, Cache.NoAbsoluteExpiration, TimeSpan.FromSeconds(15), CacheItemPriority.Normal, new CacheItemRemovedCallback(removeMyself)); </code></pre> <p>Removing:</p> <pre><code>public static void removeMyself(string key, Object value, CacheItemRemovedReason reason) { var wc = (WebClient)value; try { wc.Remove(); } catch { } } </code></pre> <p>I am in fact using the lock on HttpContext.Current.cache when adding to the cache objects.</p>
 

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