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I have a simple application that adds about 7 million short strings to a HashSet<string>. Occasionally I get an exception during a call to Hashset.Add(): System.Collections.Generic.HashSet`1.IncreaseCapacity(): Index was outside the bounds of the array.
It’s an intermittent problem and seems related to memory, but this is on a win2k8 R2 server with 16 GB, not much else going on, most of that physical memory is available. Any ideas?
The
HashSet<T>is not thread-safe. Especially when adding items in a multi-threaded scenario and the internal capacity has to be increased, things can go out of sync.