I've been experiencing kernel errors with python notebooks.
Sometimes a notebook will not be able to start a kernel anymore. For example after a kernel dies and I try to restart it.
After that ,for that notebook, no kernel/code env will work anymore. Not even kernels that worked with it previously.
Sometimes making a copy of the notebook helps, but not always.
The problem seems very intermittent.
The reported errors (in Jupyter) are always of the form:
Traceback (most recent call last):
File "/opt/dss/dataiku-dss-11.2.0/python37.packages/tornado/web.py", line 1592, in _execute
result = yield result
File "/opt/dss/dataiku-dss-11.2.0/python37.packages/tornado/gen.py", line 1133, in run
value = future.result()
File "/opt/dss/dataiku-dss-11.2.0/python37.packages/tornado/gen.py", line 1147, in run
yielded = self.gen.send(value)
File "/opt/dss/dataiku-dss-11.2.0/dku-jupyter/packages/notebook/services/sessions/handlers.py", line 73, in post
model = yield gen.maybe_future(sm.get_session(path=session_virtual_path))
File "/opt/dss/dataiku-dss-11.2.0/dku-jupyter/packages/notebook/services/sessions/sessionmanager.py", line 176, in get_session
return self.row_to_model(row)
File "/opt/dss/dataiku-dss-11.2.0/dku-jupyter/packages/notebook/services/sessions/sessionmanager.py", line 223, in row_to_model
'kernel': self.kernel_manager.kernel_model(row['kernel_id'])
File "/opt/dss/dataiku-dss-11.2.0/dku-jupyter/packages/notebook/services/kernels/kernelmanager.py", line 333, in kernel_model
"connections": self._kernel_connections[kernel_id],
KeyError: '7210d703-fbc6-47f4-bf85-2b2547e2b224'
citing a KeyError
Is there any way to make the notebooks work with (any) kernel again?
Operating system used: Windows 10
