Add xcom clearing behaviour on task retries (#19968)

Co-authored-by: Dmytro Kazanzhy <[email protected]>
apache · Dec 5, 2021 · 538612c · 538612c
1 parent e8b1120
commit 538612c
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/docs/apache-airflow/concepts/xcoms.rst b/docs/apache-airflow/concepts/xcoms.rst
@@ -38,6 +38,9 @@ You can also use XComs in :ref:`templates <concepts:jinja-templating>`::
 
 XComs are a relative of :doc:`variables`, with the main difference being that XComs are per-task-instance and designed for communication within a DAG run, while Variables are global and designed for overall configuration and value sharing.
 
+::
+
+  Note: If the first task run is not succeeded then on every retry task XComs will be cleared to make the task run idempotent.
 
 Custom Backends
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