[jira] [Created] (ARROW-16329) [Java][C++] Keep more context when marshalling errors through JNI

["Antoine Pitrou (Jira)" <ji...@apache.org>]

Antoine Pitrou created ARROW-16329:
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             Summary: [Java][C++] Keep more context when marshalling errors through JNI
                 Key: ARROW-16329
                 URL: https://issues.apache.org/jira/browse/ARROW-16329
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++, Java
            Reporter: Antoine Pitrou
             Fix For: 9.0.0


When errors are propagated through the JNI barrier, two mechanisms are involved:

* the {{Status CheckException(JNIEnv* env)}} function for Java-to-C++ error translation
* the {{JniAssertOkOrThrow(arrow::Status status)}} and {{T JniGetOrThrow(arrow::Result<T> result)}} functions for C++-to-Java error translation

Currently, both mechanisms lose most context about the original error, such as its type and any additional state, such as the optional {{StatusDetail}} in C++ or any properties in Java (which I'm sure exist on some exception classes).

We should improve these mechanisms to retain as much context as possible. For example, in a hypothetical Java-to-C++-to-Java error propagation scenario, the original Java exception from inner code should ideally be re-thrown in the outer Java context (we already support this in Python btw).



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