[GitHub] [airflow] dmariassy opened a new issue #10790: Copy of [AIRFLOW-5071] JIRA: Thousands of Executor reports task instance X finished (success) although the task says its queued. Was the task killed externally?

Tue, 08 Sep 2020 00:12:19 -0700 


dmariassy opened a new issue #10790:
URL: https://github.com/apache/airflow/issues/10790


   **Apache Airflow version**: 1.10.9
   
   
   **Kubernetes version (if you are using kubernetes)** (use `kubectl 
version`): Server: v1.10.13, Client: v1.17.0
   
   **Environment**:
   
   - **Cloud provider or hardware configuration**: AWS
   - **OS** (e.g. from /etc/os-release): Debian GNU/Linux 9 (stretch)
   - **Kernel** (e.g. `uname -a`): `Linux airflow-web-54fc4fb694-ftkp5 
4.19.123-coreos #1 SMP Fri May 22 19:21:11 -00 2020 x86_64 GNU/Linux`
   - **Others**: Redis, CeleryExecutor
   
   **What happened**:
   
   In line with the guidelines laid out in 
[AIRFLOW-7120](https://issues.apache.org/jira/browse/AIRFLOW-7120), I'm copying 
over a JIRA for a bug that has significant negative impact on our pipeline 
SLAs. The original ticket is 
[AIRFLOW-5071](https://issues.apache.org/jira/browse/AIRFLOW-5071) which has a 
lot of details from various users who use ExternalTaskSensors in reschedule 
mode and see their tasks going through the following unexpected state 
transitions:
   
   running -> up_for_reschedule -> scheduled -> queued -> **up_for_retry**
   
   In our case, this issue seems to affect approximately ~2000 tasks per day.
   
   <img width="1225" alt="Screenshot 2020-09-08 at 09 01 03" 
src="https://user-images.githubusercontent.com/9336831/92443593-02b35000-f1b2-11ea-9249-420b6e656b49.png";>
   
   **What you expected to happen**:
   
   I would expect that tasks would go through the following state transitions 
instead: running -> up_for_reschedule -> scheduled -> queued -> **running**
   
   **How to reproduce it**:
   
   Unfortunately, I don't have configuration available that could be used to 
easily reproduce the issue at the moment. However, based on the thread in 
AIRFLOW-5071, the problem seems to arise in deployments that use a large number 
of sensors in reschedule mode.
   
   


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