[GitHub] [arrow-datafusion-python] kylebrooks-8451 opened a new issue, #347: Make All pyclass Rust Types Sendable

["kylebrooks-8451 (via GitHub)" <gi...@apache.org>]

kylebrooks-8451 opened a new issue, #347:
URL: https://github.com/apache/arrow-datafusion-python/issues/347

   **Describe the bug**
   Python users expect to be able to use Python Objects on any interpreter thread and the Python interpreter freely moves objects between threads:
   
   [PyO3 Must Be Send](https://pyo3.rs/v0.18.2/class#must-be-send)
   
   [PyO3 recommends making pyclass types Sendable by using Arc in Place of Rc etc.](https://pyo3.rs/v0.18.2/class#customizing-the-class)
   
   Right now, users will see a panic in Python if objects are used between threads:
   
   ```
   thread '<unnamed>' panicked at 'assertion failed: `(left == right)`
     left: `ThreadId(15)`,
    right: `ThreadId(13)`: datafusion_python::context::PySessionContext is unsendable, but sent to another thread!', /Users/[redacted]/.cargo/registry/src/artifactory.8451.com-3c2d1e7414f45d14/pyo3-0.18.3/src/impl_/pyclass.rs:881:9
   ```
   
   **To Reproduce**
   Use a SessionContext in different Python threads.
   
   **Expected behavior**
   Python users expect to use DataFusion objects in any thread.


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[GitHub] [arrow-datafusion-python] andygrove closed issue #347: Make All pyclass Rust Types Sendable

["andygrove (via GitHub)" <gi...@apache.org>]

andygrove closed issue #347: Make All pyclass Rust Types Sendable 
URL: https://github.com/apache/arrow-datafusion-python/issues/347


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