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Collecting performance counter data

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Joe Kinsella

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Mar 4, 2003, 9:44:47 AM3/4/03

I have a C# application that is collecting performance counters from a
series of Exchange 2000 servers setup in a cluster. The applications works
fine until a failover occurs on the cluster. At this time, I start getting
an InvalidOperationException with the text "Could not Read Category Index:
xxxxx" when I call
System.Diagnostics.PerformanceCounterCategory.GetInstanceNames().

Oddly enough, this occurs whenever I fetch counter objects such as
MSExchangeMTA or MSExchangeIS - but not base OS objects such as Memory or
Processor.

I very much doubt this is a .Net bug - but I sure could use some suggestions
on why it might be behaving this way.

Thanks in advance.

Joe

Joe Kinsella

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Mar 4, 2003, 11:30:57 AM3/4/03

I did forget to mention one odd fact. After failover I can fetch these very
same counters that I cannot fetch in .Net via perfmon. And if I restart my
application, I can also begin collecting data from these counters.

"Joe Kinsella" <jkin...@silverbacktech.com> wrote in message
news:O9DB3vl4...@TK2MSFTNGP10.phx.gbl...

[MSFT]Allen

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Mar 5, 2003, 2:37:10 AM3/5/03

Hi Joe,

Thank you for this valuable information. It sounds like a bug. I'll channel
it to a right place for further investigation.

Thanks,
-Allen

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