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How to Effectively Resolve Entity Framework Timeouts for Long-Running Operations?
How to Effectively Resolve Entity Framework Timeouts for Long-Running Operations?
Jan 09, 2025 pm 02:56 PM
Entity Framework timeout issues and solutions for long-running operations
In Entity Framework (EF), long-running operations, such as function imports, can sometimes cause timeouts that exceed the default 30-second threshold. Solving this problem requires understanding the correct configuration method.
Solving the default command timeout problem
One way is to modify the connection string in the App.Config file and add "Default Command Timeout=300000". However, as the example shows, this method doesn't work. Instead, CommandTimeout needs to be set directly in the repository class:
public IEnumerable<trekmatches> GetKirksFriends()
{
this.context.CommandTimeout = 180;
return this.context.GetKirksFriends();
}
This ensures that timeouts are specifically set for relevant operations.
Override connection string timeout settings
It is important to note that specifying a Default Command Timeout in the connection string may conflict with a Manually set CommandTimeout in the repository. To avoid this problem, remove the timeout setting from the connection string.
Bug and Entity Framework Version
There is a known EF bug in specifying the default command timeout in the connection string. This bug can be solved by setting the timeout directly on the data context object. The syntax varies depending on the EF version used:
Entity Framework Core 1.0:
this.context.Database.SetCommandTimeout(180);
Entity Framework 6:
this.context.Database.CommandTimeout = 180;
Entity Framework 5:
((IObjectContextAdapter)this.context).ObjectContext.CommandTimeout = 180;
Entity Framework 4 and below:
this.context.CommandTimeout = 180;
By implementing these settings, you can effectively solve the problem of EF timing out during long-running operations.
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