feat(csharp/src/Drivers/Databricks): Fixes to heartbeat polling #2851
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May 23, 2025
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| /// This is used to maintain the command results and session when reading results takes a long time. | ||
| /// </summary> | ||
| internal class DatabricksOperationStatusPoller : IDisposable | ||
| { |
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If the client doesn't finish reading results, but does not call statement.Dispose() explicitly, this will keep polling continuously.
One (slight hacky solution) could be to use a WeakReference to the DatabricksStatement or BaseDatabricksReader to end polling after Garbage disposal.
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Consider adding this as a kind of "Known Issues" in the readme.md.
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CurtHagenlocher
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May 27, 2025
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DatabricksOperationStatusPollerwas interleaving calls withCloudFetchResultFetcher. Since they both share the underlying transport and protocol to perform this operation (andTTransportis not thread-safe), it resulted in race conditions between status polling and result fetching.This PR fixes this by adding a ThreadSafeClient to classes sharing a connection/protocol/transport. This PR should not affect Impala's client
Testing
Ran CloudFetchE2Etests, passes on this branch (fails on main)