Message235072
Oh, by the way: keeping the exception after the except block is also a tricky reference leak. In Python 3, since exceptions store their traceback, this issue may keep a lot of objects alive too long, whereas they are expected to be destroyed much earlier.
When I started to investigate this issue, it took me 2 hours to begin to understand why so many objects were kept alive. It looks like a reference cycle, a reference leak, or other kind of complex memory leak. Clearing manually local variables (ex: "self = None" in methods) is not enough.
Python 2 has a sys.exc_clear() method which can be used to workaround this issue. It cannot be used in Python 3 since the function was removed in Python 3. |
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Date |
User |
Action |
Args |
2015-01-31 01:10:21 | vstinner | set | recipients:
+ vstinner, pitrou, serhiy.storchaka |
2015-01-31 01:10:21 | vstinner | set | messageid: <1422666621.56.0.0799265434782.issue23353@psf.upfronthosting.co.za> |
2015-01-31 01:10:21 | vstinner | link | issue23353 messages |
2015-01-31 01:10:21 | vstinner | create | |
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