add "The server failed to resume the transaction" to pymssql

Added error "The server failed to resume the transaction" to the list of
error strings for the pymssql driver in determining a disconnect scenario,
as observed by one user using pymssql under otherwise unknown conditions as
leaving an unusable connection in the connection pool which fails to ping
cleanly.

Fixes: #11822
Change-Id: I1cf98046978b10775f19531878b597d32b056f13

diff --git a/doc/build/changelog/unreleased_20/11822.rst b/doc/build/changelog/unreleased_20/11822.rst
new file mode 100644 (file)
index 0000000..f6c9191
--- /dev/null
+++ b/doc/build/changelog/unreleased_20/11822.rst
@@ -0,0 +1,9 @@
+.. change::
+    :tags: bug, mssql
+    :tickets: 11822
+
+    Added error "The server failed to resume the transaction" to the list of
+    error strings for the pymssql driver in determining a disconnect scenario,
+    as observed by one user using pymssql under otherwise unknown conditions as
+    leaving an unusable connection in the connection pool which fails to ping
+    cleanly.

diff --git a/lib/sqlalchemy/dialects/mssql/pymssql.py b/lib/sqlalchemy/dialects/mssql/pymssql.py
index ea1f9bd3a7edece9c69915bf68bd0a869e6237f4..c4207987bcd135aeccac3f5291921e87ef8eefae 100644 (file)
--- a/lib/sqlalchemy/dialects/mssql/pymssql.py
+++ b/lib/sqlalchemy/dialects/mssql/pymssql.py
@@ -103,6 +103,7 @@ class MSDialect_pymssql(MSDialect):
             "message 20006",  # Write to the server failed
             "message 20017",  # Unexpected EOF from the server
             "message 20047",  # DBPROCESS is dead or not enabled
+            "The server failed to resume the transaction",
         ):
             if msg in str(e):
                 return True

diff --git a/test/dialect/mssql/test_engine.py b/test/dialect/mssql/test_engine.py
index 557341aa6a47b5bfab3188190aa60f0e65b5bf11..0e9d2fdcf03a07b11f0e55286411c78ade6f8716 100644 (file)
--- a/test/dialect/mssql/test_engine.py
+++ b/test/dialect/mssql/test_engine.py
@@ -375,6 +375,7 @@ class ParseConnectTest(fixtures.TestBase):
             "message 20006",  # Write to the server failed
             "message 20017",  # Unexpected EOF from the server
             "message 20047",  # DBPROCESS is dead or not enabled
+            "The server failed to resume the transaction",
         ]:
             eq_(dialect.is_disconnect(error, None, None), True)