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NullRefException during connect
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Marco_Vank 2015-11-16, 17:04 #1
Member since Aug 2015 · 8 posts
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Subject: NullRefException during connect
Hello,

In our application we have 2 Xmpp clients who simultaneously connect to 2 different Openfire servers.
I'm not sure if the 2 instances connecting at the same time results in some multi threading issue, but during this connecting we often see the following exception.
Should we be able to execute this scenario or do we have to change our code that we don't connect bot clients at the same time?

System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
   at Matrix.Util.Enum.GetValues[T]()
   at Matrix.Xmpp.Sasl.Mechanism.GetSaslMechanism(String mechanism)
   at Matrix.Xmpp.Sasl.Mechanisms.<>c__DisplayClass1.<SupportsMechanism>b__0(Mechanism mech)
   at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source, Func`2 predicate)
   at Matrix.SaslHandler.SelectSaslMechanism(Mechanisms mechanisms)
   at Matrix.SaslHandler.StartSasl(StreamFeatures features)
   at Matrix.Xml.XmppStreamParser.DoRaiseOnStreamElement(XmppXElement el)
This post was edited on 2015-11-16, 20:24 by Alex.
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Alex 2015-11-16, 21:01 #2
Member since Feb 2003 · 4388 posts · Location: Germany
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we have found an threading issue in a new internal caching routine.
Can you please upgrade to 2.0.0.12 and let us know if this fixed your problems?

Thanks,
Alex
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Marco_Vank 2015-11-17, 16:24 #3
Member since Aug 2015 · 8 posts
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We've been running this version for a day now, with a couple of times connecting.
I haven't seen the issue anymore so far.
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Alex 2015-11-17, 23:01 #4
Member since Feb 2003 · 4388 posts · Location: Germany
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thanks for your feedback.
I am pretty sure that this build solves your problem. There was a not thread safe global collection before which caused your problem.

Thanks,
Alex
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