[batch] Fix errors on the worker (#11686)
[batch] Fix errors on the worker (#11686)

* [batch] Fix errors on the worker

* Update worker.py

* treat connectionrefusederror as non-extant socket

Co-authored-by: Dan King <7739259b40d3ef66b5ccc726303499d46adb7c70@gmail.com>
Co-authored-by: Daniel King <a3cd222ea982fef7e4d761fbe5435903b90070ac@broadinstitute.org>
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