James Henderson created ARROW-11385:
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Summary: JsonFileWriter fails with NPE after VectorSchemaRoot
syncSchema
Key: ARROW-11385
URL: https://issues.apache.org/jira/browse/ARROW-11385
Project: Apache Arrow
Issue Type: Bug
Components: Java
Affects Versions: 2.0.0
Reporter: James Henderson
Hey there :)
Repro:
* Open VSR
* Do something that'll change the `Field` of one of the vectors in the VSR
(promotable writer, etc)
* `vsr.syncSchema()`
* Open JsonFileWriter, `start`, `write` -> NPE
Looks like the cause is that the `fieldVectorsMap` cache isn't updated in
`syncSchema`? Possibly a few other places - `addVector`/`removeVector` too?
Cheers,
James
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