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Cannot read LongHistogram back from histogram log when recorded value count exceeds ~10000

Open scharnyw opened this issue 6 months ago • 1 comments

Run the following code to reproduce.

var histogram = new LongHistogram(TimeSpan.FromMinutes(40).Ticks, 4);
var maxValue = TimeSpan.FromMinutes(20).Ticks;

var count = 10000;
for (var i = 0; i < count; i++)
{
    histogram.RecordValue(Random.Shared.NextInt64(maxValue));
}

await using var ms = new MemoryStream();
HistogramLogWriter.Write(ms, DateTimeOffset.FromUnixTimeMilliseconds(histogram.StartTimeStamp).UtcDateTime, histogram);

ms.Position = 0;

var readBackHistograms = new HistogramLogReader(ms).ReadHistograms().ToList();

When count is 10000 or more, the last line consistently throws the following exception:

System.ArgumentException: 'The buffer does not contain the indicated payload amount'

But when count is set to 9000, it runs successfully without issue.

I'm using HdrHistogram v2.5.0 on .NET 8.

scharnyw avatar Aug 26 '24 03:08 scharnyw