我们有一个基于 UCMA 3.0 的应用程序/机器人，可以将最终用户与专家相匹配。它将来自最终用户的传入一对一聊天请求迁移到多用户会议中，然后邀请专家参加由此产生的多用户会议。应用程序本身仍然是会议的参与者。在任何给定时间，我们的应用程序可能会代理多个此类会议，但每个最终用户只有一个。但是，一位专家可能同时参加多个会议。在我们的应用程序日志中，我们偶尔会看到以下异常。
Conference Migration conf call # 63809878 中的错误，地址：sip:xxxxxx@xxx.com;gruu;opaque=app:conf:focus:id:TQRREACE System.InvalidOperationException：收到会议邀请或会议升级请求后无法加入其他会议. 在 Microsoft.Rtc.Collaboration.ConferenceSession.VerifyAndGetConferenceAddress(String meetingUri, String parameterName) 在 Microsoft.Rtc.Collaboration.ConferenceSession.BeginJoinCommon(String meetingUri, ConferenceJoinOptions options, AsyncCallback userCallback, Object state) 在 Microsoft.Rtc.Collaboration.ConferenceSession.BeginJoin （字符串 ConferenceUri，ConferenceJoinOptions 选项，AsyncCallback userCallback，对象状态）在（字符串 A_0，字符串 A_1，字符串 A_2，布尔 A_3，布尔 A_4）
Below is the code snippet used to make conference. Previously this site was an OCS 2007 R2 Installation and was migrated to Lync 2010 Server.
Site is running in mixed mode. It occurs only on production server and we are not able to generate this exception on dev server, we
have tested it after generating more than 15 conferences simultaniously but no luck.
private void CreateAdHohConf(string user1Uri, string user2uri, string subject) { Exception exception = null;
// Create conference scheduling details for the conference.
ConferenceScheduleInformation scheduleInfo = new ConferenceScheduleInformation();
// Restrict the conference to invited users only.
scheduleInfo.AccessLevel = ConferenceAccessLevel.Everyone;
// Set a subject for the conference.
scheduleInfo.Subject = subject;
scheduleInfo.Description = subject;
scheduleInfo.ConferenceId = ConferenceServices.GenerateConferenceId();
scheduleInfo.ExpiryTime = System.DateTime.Now.AddHours(8);
scheduleInfo.IsPasscodeOptional = true;
scheduleInfo.PhoneAccessEnabled = false;
// Don't automatically assign a leader.
scheduleInfo.AutomaticLeaderAssignment = AutomaticLeaderAssignment.Everyone;
// Add the caller and recipient as participants.
scheduleInfo.Participants.Add(new ConferenceParticipantInformation("sip:" + user1Uri, ConferencingRole.Leader));
scheduleInfo.Participants.Add(new ConferenceParticipantInformation("sip:" + user2uri, ConferencingRole.Leader));
scheduleInfo.Mcus.Add(new ConferenceMcuInformation(McuType.ApplicationSharing));
scheduleInfo.Mcus.Add(new ConferenceMcuInformation(McuType.InstantMessaging));
scheduleInfo.Mcus.Add(new ConferenceMcuInformation(McuType.AudioVideo));
scheduleInfo.Mcus.Add(new ConferenceMcuInformation(McuType.Meeting));
//Scheduling conference
ConferenceServices objLocalConfSvc = lyncAgent.LocalEndpoint.ConferenceServices;
Conference confSession = null;
objLocalConfSvc.BeginScheduleConference(scheduleInfo,
result =>
{
try
{
confSession = objLocalConfSvc.EndScheduleConference(result);
}
catch (RealTimeException rtex)
{
exception = rtex;
}
catch (Exception ex)
{
exception = ex;
}
finally
{
_waitForConferenceScheduling.Set();
}
}, objLocalConfSvc);
_waitForConferenceScheduling.WaitOne();
//Begin Join conference
ConferenceSession objLocalConfSession=this.call.Conversation.ConferenceSession;
try
{
ConferenceJoinOptions joinOptions = new ConferenceJoinOptions() { CanManageLobby = false, JoinMode = JoinMode.Default };
objLocalConfSession.BeginJoin(new RealTimeAddress(confSession.ConferenceUri).Uri, joinOptions,
result => {
try
{
objLocalConfSession.EndJoin(result);
}
catch (Exception ex)
{
exception = ex;
}
finally
{
//Again, for sync. reasons.
_waitForConferenceJoin.Set();
}
}
, this.call.Conversation.ConferenceSession);
// Wait until join completes.new RealTimeAddress(this._conference.ConferenceUri).Uri,
_waitForConferenceJoin.WaitOne();
}
catch (InvalidOperationException ioex)
{
exception = ioex;
}
catch (Exception ex)
{
exception = ex;
}
//Begin Escalation
Conversation objLocalConv= this.call.Conversation;
try
{
objLocalConv.BeginEscalateToConference(
result =>
{
try
{
objLocalConv.EndEscalateToConference(result);
}
catch (Exception ex)
{
exception = ex;
}
finally
{
//Sync It
_waitForEscalation.Set();
}
}
, objLocalConv);
// Wait until escalation completes.
_waitForEscalation.WaitOne();
}
catch (InvalidOperationException ioex)
{
exception = ioex;
}
catch (Exception ex)
{
exception = ex;
}
finally
{
if (exception != null)
{
lyncAgent.Logger.Error( "Error in Conference Migration conf call # " + GetHashCode() + " , Address :" + confSession.ConferenceUri , exception);
}
}
}
请建议优先考虑可能存在的问题。
Thanks in advance.