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Kevin Bates 2d688f2071 Prevent access through 'NoneType' when closing activity_stream ... Although I'm unable to reproduce the issue, its a safe change to prevent an AttributeError from occuring ('NoneType' object has no attribute 'close'). The user that reported this is attempting to launch a kernel and I believe the launch only partially completed such that `kernel._activity_stream` did not get established. (This occurred from Jupyter Enterprise Gateway where we deal with remote kernel launches across resource-managed clusters, so things are a bit more involved relative to kernel establishment.)		7 years ago
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tests	tornado 5 fixes in tests	8 years ago
__init__.py	s/jupyter_notebook/notebook	11 years ago
handlers.py	flush iopub before sending restarting/dead status messages	8 years ago
kernelmanager.py	Prevent access through 'NoneType' when closing activity_stream	7 years ago