Will Jones created ARROW-15718:
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Summary: [R] Joining two datasets crashes if use_threads=FALSE
Key: ARROW-15718
URL: https://issues.apache.org/jira/browse/ARROW-15718
Project: Apache Arrow
Issue Type: Bug
Components: C++, R
Affects Versions: 7.0.0
Reporter: Will Jones
Assignee: Will Jones
Fix For: 8.0.0
In ARROW-14908 we solved the case of joining a dataset to an in memory table,
but did not solve joining two datasets.
The previous solution was to add +1 to the thread count, because the hash join
logic might be called by the scanner's IO thread. For joining more than 1
dataset, we might have more than 1 IO thread, so we either need to add a larger
arbitrary number or find a way to make the state logic more resilient to
unexpected threads.
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