Ryan Blue created TOREE-389:
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Summary: Scala interpreter hangs if Spark is referenced before it
is bound
Key: TOREE-389
URL: https://issues.apache.org/jira/browse/TOREE-389
Project: TOREE
Issue Type: Bug
Reporter: Ryan Blue
Some users run cells in a notebook before the kernel is finished starting. The
messages are queued and run after the KernelMessageRelay is enabled, but any
messages that reference {{spark}} or bound variables cause IMain to throw an
exception. That exception causes the interpreter to hang.
It seems odd that a missing variable reference causes IMain to throw an
exception, so there may be a threading issue, a race between binding {{spark}}
and the cell that references it.
The problem can be avoided by moving {{postInit}} tasks into init.
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