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David Johnson authored
libdb.pm.in. There's a nasty little hack to deal with forks, because the underlying python mysql db module does not help us deal with them. Basically, there is no way (and I mean no way!) to close a connection in the child without actually sending a disconnect to the server... so the parent's connection gets killed too. The only way around this is to hack the Python C API wrapper that the mysql python module is built on. For now, we just close off both connections before a fork via a TBDBPreFork(), and restore them implicitly on the first query after the fork. It sucks, but it's the best we can do until hacking the mysql module. Anyway, the big fix is that testbed-ops no longer gets spammed with DBQuery failures; they are retried just like in libdb.pm.in.
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