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new 538612c Add xcom clearing behaviour on task retries (#19968)
538612c is described below
commit 538612c3326b5fd0be4f4114f85e6f3063b5d49c
Author: Dmytro Kazanzhy <[email protected]>
AuthorDate: Mon Dec 6 01:03:38 2021 +0200
Add xcom clearing behaviour on task retries (#19968)
Co-authored-by: Dmytro Kazanzhy <[email protected]>
---
docs/apache-airflow/concepts/xcoms.rst | 3 +++
1 file changed, 3 insertions(+)
diff --git a/docs/apache-airflow/concepts/xcoms.rst
b/docs/apache-airflow/concepts/xcoms.rst
index 315c872..eb11ff7 100644
--- 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
---------------
