We do quite a lot of downloads simultaneously ( in the range of
100-200). NSURLDownload is used for the purpose. We witness some
random crashes while doing so.
We use separate threads to carry out these downloads. One thread is
made to handle up to 10 downloads at a time. And there are multiple
threads running at the same time.
While this design ought to work, you really don't need to use multiple
threads for this. You can start any number of asynchronous downloads/
connections from one thread. All the network-related code happens on a
separate background thread run by CFNetwork; your thread is only
invoked when a delegate method needs to be called.
Looks like your code is on the stack at the time of the crash (I'm
assuming 'myObject' is one of your classes.) I would double-check that
code for thread-safety, since you're running it on multiple threads at
once.
We were wondering what is the bundle that it is trying to refer
which is resulting in the crash.
In both cases the caller is _CFErrorCreateLocalizedDescription, so it
must be looking up error messages, probably from the CoreFoundation,
CFNetwork or Foundation frameworks.
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