Reapply "Merge remote-tracking branch 'upstream/sea-migration' into decouple-session"

This reverts commit bdb8381.

Signed-off-by: varun-edachali-dbx <varun.edachali@databricks.com>

Author: varun-edachali-dbx

.github/CODEOWNERS

@@ -2,4 +2,4 @@
 # the repo. Unless a later match takes precedence, these
 # users will be requested for review when someone opens a
 # pull request.
-*       @deeksha-db @samikshya-db @jprakash-db @yunbodeng-db @jackyhu-db @benc-db
+*       @deeksha-db @samikshya-db @jprakash-db @jackyhu-db @madhav-db @gopalldb @jayantsing-db @vikrantpuppala @shivam2680

src/databricks/sql/backend/thrift_backend.py

@@ -134,6 +134,13 @@ def __init__(
         # max_download_threads
         #  Number of threads for handling cloud fetch downloads. Defaults to 10
 
+        logger.debug(
+            "ThriftBackend.__init__(server_hostname=%s, port=%s, http_path=%s)",
+            server_hostname,
+            port,
+            http_path,
+        )
+
         port = port or 443
         if kwargs.get("_connection_uri"):
             uri = kwargs.get("_connection_uri")
@@ -405,6 +412,8 @@ def attempt_request(attempt):
 
                 # TODO: don't use exception handling for GOS polling...
 
+                logger.error("ThriftBackend.attempt_request: HTTPError: %s", err)
+
                 gos_name = TCLIServiceClient.GetOperationStatus.__name__
                 if method.__name__ == gos_name:
                     delay_default = (
@@ -449,6 +458,7 @@ def attempt_request(attempt):
                     else:
                         logger.warning(log_string)
             except Exception as err:
+                logger.error("ThriftBackend.attempt_request: Exception: %s", err)
                 error = err
                 retry_delay = extract_retry_delay(attempt)
                 error_message = (
@@ -936,6 +946,12 @@ def execute_command(
             thrift_handle,
         )
 
+        logger.debug(
+            "ThriftBackend.execute_command(operation=%s, session_handle=%s)",
+            operation,
+            session_handle,
+        )
+
         spark_arrow_types = ttypes.TSparkArrowTypes(
             timestampAsArrow=self._use_arrow_native_timestamps,
             decimalAsArrow=self._use_arrow_native_decimals,

src/databricks/sql/client.py

@@ -217,6 +217,12 @@ def read(self) -> Optional[OAuthToken]:
         # use_cloud_fetch
         # Enable use of cloud fetch to extract large query results in parallel via cloud storage
 
+        logger.debug(
+            "Connection.__init__(server_hostname=%s, http_path=%s)",
+            server_hostname,
+            http_path,
+        )
+
         if access_token:
             access_token_kv = {"access_token": access_token}
             kwargs = {**kwargs, **access_token_kv}
@@ -291,7 +297,13 @@ def __enter__(self) -> "Connection":
         return self
 
     def __exit__(self, exc_type, exc_value, traceback):
-        self.close()
+        try:
+            self.close()
+        except BaseException as e:
+            logger.warning(f"Exception during connection close in __exit__: {e}")
+            if exc_type is None:
+                raise
+        return False
 
     def __del__(self):
         if self.open:
@@ -414,7 +426,14 @@ def __enter__(self) -> "Cursor":
         return self
 
     def __exit__(self, exc_type, exc_value, traceback):
-        self.close()
+        try:
+            logger.debug("Cursor context manager exiting, calling close()")
+            self.close()
+        except BaseException as e:
+            logger.warning(f"Exception during cursor close in __exit__: {e}")
+            if exc_type is None:
+                raise
+        return False
 
     def __iter__(self):
         if self.active_result_set:
@@ -745,6 +764,9 @@ def execute(
 
         :returns self
         """
+        logger.debug(
+            "Cursor.execute(operation=%s, parameters=%s)", operation, parameters
+        )
 
         param_approach = self._determine_parameter_approach(parameters)
         if param_approach == ParameterApproach.NONE:

tests/e2e/test_driver.py

@@ -50,7 +50,7 @@
 
 from tests.e2e.common.uc_volume_tests import PySQLUCVolumeTestSuiteMixin
 
-from databricks.sql.exc import SessionAlreadyClosedError
+from databricks.sql.exc import SessionAlreadyClosedError, CursorAlreadyClosedError
 
 log = logging.getLogger(__name__)
 
@@ -820,7 +820,6 @@ def test_close_connection_closes_cursors(self):
             ars = cursor.active_result_set
 
             # We must manually run this check because thrift_backend always forces `has_been_closed_server_side` to True
-
             # Cursor op state should be open before connection is closed
             status_request = ttypes.TGetOperationStatusReq(
                 operationHandle=ars.command_id.to_thrift_handle(),
@@ -846,7 +845,6 @@ def test_closing_a_closed_connection_doesnt_fail(self, caplog):
         with self.connection() as conn:
             # First .close() call is explicit here
             conn.close()
-
         assert "Session appears to have been closed already" in caplog.text
 
         conn = None

tests/unit/test_client.py

@@ -20,6 +20,7 @@
 import databricks.sql
 import databricks.sql.client as client
 from databricks.sql import InterfaceError, DatabaseError, Error, NotSupportedError
+from databricks.sql.exc import RequestError, CursorAlreadyClosedError
 from databricks.sql.types import Row
 from databricks.sql.result_set import ResultSet, ThriftResultSet