Exitmap fails when circuits are "overused"
Exitmap seems to crash whenever "too much" is done over a circuit. It's not clear what "too much" means, exactly. It has happened with a module that fetched several X.509 certificates, and apparently with another module that resolved a large set of domains over a simple exit relay.
First, the problem must be narrowed down. It's not clear if the issue is in exitmap, Stem, or tor. The nature of the problem is also not clear yet. Does it happen when too much data is sent, or if a given timeout is reached?