toddmeng-db commented on code in PR #3217:
URL: https://github.com/apache/arrow-adbc/pull/3217#discussion_r2241477161
##########
csharp/src/Drivers/Apache/Hive2/HiveServer2Statement.cs:
##########
@@ -394,6 +404,10 @@ public override void Dispose()
HiveServer2Connection.HandleThriftResponse(resp.Status,
activity);
OperationHandle = null;
}
+ // For DatabricksReader, must be called after CloseOperation,
otherwise it may cancel a
+ // request when the input buffer of Thrift client has not been
consumed/cleaned-up
+ _currentReader?.Dispose();
+ _currentReader = null;
Review Comment:
Encountered during testing:
When this is done before CloseOperation in this Dispose method,
in DatabricksOperationStatusPoller, the Thrift Client may have received a
full or partial GetOperationStatusResp in the input-buffer. However, if
cancellation occurs before this method (recv_GetOperationStatus) completes, it
would leave stranded response data in the input buffer.
Changing to the ordering above, it means that CloseOperation happens after
GetOperationStatus (which is guarded by a lock on the ThreadSafeClient) call
completing
##########
csharp/src/Drivers/Apache/Hive2/HiveServer2Statement.cs:
##########
@@ -394,6 +404,10 @@ public override void Dispose()
HiveServer2Connection.HandleThriftResponse(resp.Status,
activity);
OperationHandle = null;
}
+ // For DatabricksReader, must be called after CloseOperation,
otherwise it may cancel a
+ // request when the input buffer of Thrift client has not been
consumed/cleaned-up
+ _currentReader?.Dispose();
+ _currentReader = null;
Review Comment:
Encountered during testing:
When this is done before CloseOperation in this Dispose method,
in DatabricksOperationStatusPoller, the Thrift Client may have received a
full or partial GetOperationStatusResp in the input-buffer. However, if
cancellation occurs before this method (recv_GetOperationStatus) completes, it
would leave stranded response data in the input buffer.
Changing to the ordering above, it means that CloseOperation happens after
GetOperationStatus (which is guarded by a lock on the ThreadSafeClient) call
completes
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