NotifyFilters.Size does not raise events on Server 2008 R2/Windows 7
as Won't Fix
1/24/2013 9:37:45 AM
User(s) can reproduce this bug
I have a app running for several years and I am on the way to use this on Server 2008.
This app monitors >>10.000 's of logfiles per day of a big number of business applications
and runs 24x7 and notifies the admin crew about importent errors and/or failed transactions.
This app is an importent piece in the business infrastructure.
The app is net [C#] and uses the Framework 2.0 and inside, the FileSystemWatcher [FSW]
is the power horse. This worked well even with a huge number of files and more then
~10^6 events per day.
Running on Server 2008 (R2) and we have less events. I tracked this down to be a problem
Many files are continued to work, but many other not, and I am stuck to migrate this
app to a 2008 (R2) server. There are different patterns in behavior, which write the logfiles:
a) OpenAppend, write, close.
b) OpenAppend, write, sleep, write, sleep, write, close
a) Causes the FSW to raise events,
b) Events are only generated on the first write after open and on the final close.
This is in contrast to the behavior on Server 2003/XP, where NotifiFilters.Size
[pattern b) of above] raises the events on each update. So, if the app keeps
the logfile open for hours, but regularly appends textlines, no event at all is
Due to the lot of files and continous changes, polling is not an option.
I see this ether as a platform specific bug in the framework or in Server 2008.
There is no publicly seeable documentation, which point out a new behavioral
pattern of FSW.
So, I stuck here. The remaining option are not optimal: Downgrade to
Server 2003 [maintenance ends 2014] or migrate to Linux [which works
well, but integration in the Windows Landscape is suboptimal].
Hope, this is a bug and to get a fix.
Thanks you very much,