[airflow] branch master updated: Add explanation of the Presto Kerberos + SSL + snowflake problem (#12939)

[po...@apache.org]

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potiuk pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/airflow.git


The following commit(s) were added to refs/heads/master by this push:
     new 5c74c3a  Add explanation of the Presto Kerberos + SSL + snowflake problem (#12939)
5c74c3a is described below

commit 5c74c3a5c1bc6424a068f1dd21a2d999b92cd8c5
Author: Jarek Potiuk <ja...@polidea.com>
AuthorDate: Wed Dec 9 09:38:53 2020 +0100

    Add explanation of the Presto Kerberos + SSL + snowflake problem (#12939)
---
 airflow/providers/presto/ADDITIONAL_INFO.md | 30 +++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/airflow/providers/presto/ADDITIONAL_INFO.md b/airflow/providers/presto/ADDITIONAL_INFO.md
new file mode 100644
index 0000000..479ae50
--- /dev/null
+++ b/airflow/providers/presto/ADDITIONAL_INFO.md
@@ -0,0 +1,30 @@
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements.  See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership.  The ASF licenses this file
+ to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance
+ with the License.  You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing,
+ software distributed under the License is distributed on an
+ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ KIND, either express or implied.  See the License for the
+ specific language governing permissions and limitations
+ under the License.
+ -->
+
+## Additional limitations
+
+The presto provider might not work correctly with Kerberos + SSL when it is installed together with the
+Snowflake provider. It's because of Snowflake monkeypatching the urllib3
+library as described in [this issue](https://github.com/snowflakedb/snowflake-connector-python/issues/324)
+the offending code is [here](https://github.com/snowflakedb/snowflake-connector-python/blob/133d6215f7920d304c5f2d466bae38127c1b836d/src/snowflake/connector/network.py#L89-L92)
+
+In the future Snowflake plans to get rid of the monkeypatching.
+
+You can keep track of [the issue](https://github.com/apache/airflow/issues/12881) in order to know when the
+issue will be resolved.