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Diagnosing RavenDB Problem in Production

Oren Eini user avatar by
Oren Eini
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Oct. 11, 13 · Interview
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we have run into a problem in our production system. luckily, this is a pretty obvious case of misdirection.

take a look at the stack trace that we have discovered:

image

the interesting bit is that this is an “impossible” error. in fact, this is the first time that we have actually seen this error ever .

but looking at the stack trace tells us pretty much everything. the error happens in dispose, but that one is called from the constructor . because we are using native code, we need to make sure that an exception in the ctor will properly dispose all unmanaged resources.

the code looks like this:

image

and here we can see the probable cause for the error. we try to open a transaction, then an exception happens, and the dispose is called, but it isn’t ready to handle this scenario, so throws.

the original exception is masked, and you have a hard debug scenario.



Production (computer science)

Published at DZone with permission of Oren Eini, DZone MVB. See the original article here.

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