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Posted to jira@arrow.apache.org by "James Henderson (Jira)" <ji...@apache.org> on 2021/01/25 22:50:00 UTC

[jira] [Created] (ARROW-11385) JsonFileWriter fails with NPE after VectorSchemaRoot syncSchema

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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