openHistorian hangs/Freezing when PMU connecting through DNP3 protocol


We are using openHistorian 2.6.x and connected PMU using DNP3 protocol. Randomly openHistorian Manager is getting freezing.
Statuslog.txt: Has logged no error message
ErrorLog.txt: Logged below error or exception.

[6/19/2020 8:44:16 AM] Date and Time:         6/19/2020 8:44:16 AM
Machine Name:          ABC
Machine IP:            fe80::4027:9823:bf07:89e9%33
Machine OS:            Microsoft Windows NT 6.2.9200.0

Application Domain:    openHistorian.exe
Assembly Codebase:     C:/Program Files/openHistorian/openHistorian.exe
Assembly Full Name:    openHistorian, Version=, Culture=neutral, PublicKeyToken=null
Assembly Version:
Assembly Build Date:   5/5/2020 6:22:56 PM
.Net Runtime Version:  4.0.30319.42000

Exception Source:      GSF.SortedTreeStore
Exception Type:        System.Exception
Exception Message:     Out of free space
Exception Target Site: GetPathWithEnoughSpace

---- Stack Trace ----
   GSF.Snap.Services.Writer.SimplifiedArchiveInitializer`2.GetPathWithEnoughSpace(estimatedSize As Int64)
       openHistorian.exe: N 00282
   GSF.Snap.Services.Writer.SimplifiedArchiveInitializer`2.CreateArchiveFile(startKey As TKey, endKey As TKey, estimatedSize As Int64, data As TreeStream`2, archiveIdCallback As Action`1)
       openHistorian.exe: N 00053
   GSF.Snap.Services.Writer.CombineFiles`2.OnExecute(sender As Object, e As EventArgs`1)
       openHistorian.exe: N 01550
   GSF.Threading.ScheduledTask.TryCallback(args As ScheduledTaskRunningReason)
       openHistorian.exe: N 00087

I checked code, there is below logic at Initialize function of ArchiveInitializerSettings.cs. Could you please give some clarification about this error and is it possible to cause the application hangs?
Also our PDC machine contains 75GB free space.

        private void Initialize()
            m_directoryMethod = ArchiveDirectoryMethod.TopDirectoryOnly;
            m_isMemoryArchive = false;
            m_prefix = string.Empty;
            m_fileExtension = ".d2i";
            m_desiredRemainingSpace = 5 * 1024 * 1024 * 1024L; //5GB
            m_encodingMethod = EncodingDefinition.FixedSizeCombinedEncoding;
            m_writePath = new ImmutableList<string>((x) =>
                return x;
            m_flags = new ImmutableList<Guid>();

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