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PONHibernate SQL Server Suspended Processes
 

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    <p>Have run into an issue that i am hoping somebody can help give me some direction on. Working on an application that is several years on, on .NET 3.5 and NHibernate 1.2. Have been having a problem over the past week where transaction seem to lock up randomly. I noticed NH had a command_timeout of 100000. I have now brought this down to 30 as 100000 seemed crazy! The issues are still occurring.</p> <p>SQL Server Activity Monitor shows a blocking transaction when the issue occurs, normally in the SUSPENDED state. If i kill the blocking process, those processes being blocked fire off and the system is fine.</p> <p>Running a check on the blocking process, i can see the approx SQL statement being executed that is causing the issue, but it's a statement that is executed through much of the system, retrieving common data across most pages.</p> <p>What do I think could have caused this? Nothing obvious... we did release a couple of small changes, but none of them should have this effect. Windows updates/service packs were recently installed as well about the same time. Could SQL/.NET SP updates be the cause of this issue??</p> <p>I know there is a lot here, but trying to give as much as i have at the moment.</p> <p>NEW INFO: Now that the command_tinmeout has been updated to 30 seconds, queries that exceed this execution time are killed off automatically - or so i see in Activity Monitor. However, it seems as somthing else is going on, as repeat queries fail with timeout as well. However, if i stop and start the application pool, everything begins to work as per normal, at least for a while.</p>
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