Airflow tasks clear. tis – a list of task instances.

Airflow tasks clear Airflow already provides a command to clear selection. airflow clear your_dag_id --task_regex B --start_date 2017-09-25T17:00:00 --end_date 2017-09-25T17:00:00 If you want to do this via the UI, you can go to Browse -> Task Instances to find the task instance you want to clear. db import create_session def rerun_dag_task(dag_name, task_name): dag_runs = DagRun. session – current session Jul 15, 2022 · airflow tasks clear dag_id \--task-regex task_regex \--start-date START_DATE \--end-date END_DATE このコマンドは dag_id が指し示すDAG Runについて、正規表現のマッチするすべてのタスク・インスタンスをクリアします。 Mar 22, 2021 · In this case, you can run airflow tasks clear --task-regex "[c|d]_processor" --downstream -s 2021-03-22 -e 2021-03-23 <dag_id>, which clear the states for c and d processors with their downstreams. I have airflow up and running an BashOperator works fine, I can also run airflow test <dag> <task> where task is the big query task I want to run, but when I trigger the DAG from the UI the bigquery task is never queued. If rerun_failed_tasks is used, backfill will auto re-run the previous failed task instances within the backfill date range Tasks¶ A Task is the basic unit of execution in Airflow. dag – DAG object Aug 14, 2019 · As @obayram states, activate_dag_runs parameter in clear_task_instances is deprecated in version 2. What I save here is avai Clearing a task instance doesn’t delete the task instance record. taskinstance with the on_retry_callback parameter in operators to retry the last n tasks when the current tasks fails. tis – a list of task May 4, 2018 · I'm trying out airflow with the BigQueryOperator. settings import Session from airflow. cfg'-t, --task-regex <task_regex> The regex to filter specific task_ids to backfill (optional)-u, --upstream: Include upstream tasks-y, --yes: Do not prompt to confirm. One of the most common tasks that you may need to perform in Airflow is clearing a task. edit: As was mentioned in the comments on the original question in case one example of airflow not being able to run a task is when it cannot write to required locations. Restarting failed tasks in Airflow is a crucial aspect of ensuring the successful execution of data pipelines. pid airflow. find(dag_id=dag_name) dag_runs_sorted = sorted(dag_runs, key=lambda dr: dr. By default, teardown tasks are ignored for the purpose of evaluating dag run state. So, I think it's a bug. This is useful because when you kill off a DAG Run or Task through the Airflow Web Server, the task still runs in the background on one of the executors until the task is complete. dag – DAG object Dec 21, 2015 · airflow clear is described as "Clear a set of task instance, as if they never ran", it would be great if this included clearing the xcom data from that instance. If I clear the tasks, it will then run successfully. This needs to be achieved programmatically. it has three child tasks. 7. Jan 10, 2011 · Run subsections of a DAG for a specified date range. operator. ) that delete XCOM once the DAG run is finished. You signed out in another tab or window. delete-broken-dags airflow. dag_id and task_id='your_task_id' and execution_date={{ ds }}", dag=dag) refresh_from_task (task, pool_override = None) [source] ¶ Copy common attributes from the given task. Run subsections of a DAG for a specified date range. clear_task_instances (tis, session, activate_dag_runs = None, dag = None, dag_run_state = DagRunState. 3,824 5 5 gold Clearing a task instance creates a record of the task instance. Only works in conjunction with task_regex. Oct 16, 2024 · Hi, in Airflow auto restart is implemented only for tasks, but you can manually clear the first task in the UI and Airflow will restart it and all downstream tasks. A popup window appears, giving you the following options to clear and rerun additional task instances related to the selected task: Past: Clears any instances of the task in DAG runs with a data interval File location or directory from which to look for the dag. 3, one gets:. 0 What happened Recently we added some automation to restarting Airflow tasks with "clear" command so we use this feature a lot. Dec 26, 2023 · Airflow Clear Task Programmatically. session – current session. When the task initially fails, in its on_failure_callback it does an xcom_push. I do not change anything, but it doesn't work on Airflow 2. So instead of a task order, it's a tree of the status chain. How this can be accomplished? I am using Airflow verion 2. * -t building -s 2022-04-01 -e 2022-04-30 Dec 21, 2020 · Description I have noticed that the stable REST API doesn't have the ability to run a task (which is possible from the airflow web interface. dependency:-d: downstream-u: upstream. The executor will re-run it. Stuck in state PENDING even if celery Sep 25, 2017 · If you clear via the command line, you can specify which tasks you want cleared. Aug 24, 2017 · We have a solution and want to share it here before 1. We often clear tasks in RUNNING state, which means that Apr 16, 2019 · Using airflow cheat-sheet, in Airflow 2. Tasks are arranged into DAGs, and then have upstream and downstream dependencies set between them in order to express the order they should run in. airflow. Oct 12, 2017 · You have to add a task depends on you metadatadb (sqllite, PostgreSql, MySql. 0. Jan 10, 2012 · Run subsections of a DAG for a specified date range. Jun 7, 2022 · You signed in with another tab or window. Improve this question. Operator) – The task object to copy from. What you are trying to do here is not clear; but also impossible (you can't mark state of a task during DAG-definition, since it hasn't run yet). g. log-cleanup. my_dag_id Jan 10, 2022 · Programmatically clear the state of airflow task instances. include_parentdag -- Clear tasks in the parent dag of the subdag. sleep(300) in either of these params of Task 1. There is already old data present from the successful DAG run in our DB . If reset_dag_run option is used, backfill will first prompt users whether airflow should clear all the previous dag_run and task_instances within the backfill date range. motam79 motam79. Specifically, there are 2 use-cases that confuse me: If I run airflow scheduler for a few minutes, stop it for a minute, then restart it again, my DAG seems to run extra tasks for the first 30 seconds or so, then it continues as normal (runs every 10 sec). May 2, 2018 · airflow clear -f -t * my_dags. Airflow detects two kinds of task/process mismatch: Zombie tasks are tasks that are supposed to be running but suddenly died (e. . Jun 11, 2020 · The airflow clear and airflow backfill commands have options to specify start and end dates, but not specific instance times, so they will cause 24 reruns per date which will all perform the exact same work. Feb 23, 2019 · I am running airflow clear -t task_regex -s 2019-02-23 -e 2019-02-24 dag_id to clear and then re-run a task. I think it would be nice to have either: Run task Run all failing tasks (rerun from point of fa Clear tasks in the parent dag of the subdag. 9. And the DAG status depends upon each of the id worker tasks. 2 Dec 29, 2024 · Apache Airflow tasks are structures in the form of DAGs, but there are some scenarios where you might need to kill or Airflow stop DAG tasks. QUEUED) [source] ¶ Clears a set of task instances, but makes sure the running ones get killed. Apache Airflow version. unfortunately, there are cases where this parent task will succeed, but two of the three children will fail (and a retry on the children w Run subsections of a DAG for a specified date range. airflow Share Sep 25, 2020 · I have an airflow setup. Here is an example: airflow tasks clear -T -s 2021-01-01 -e 2021-01-02 example_dag In this command:-T or --task_regex is used to match the task by regex. QUEUED) [source] ¶ Clear a set of task instances, but make sure the running ones get killed. Clearing the task will re-run the task, and any other tasks after it will run. Instead of going into the DAG and clicking on a task and clicking run, go to the Dag run with the failed task, click the failed task and click clear. After the task reruns, the max_tries value updates to 0, and the current task instance state updates to None. Apr 7, 2017 · I am using a LocalExecutor and my dag has 3 tasks where task(C) is dependant on task(A). my_dag_id EDIT 1: Like @tobi6 explained it, the * was indeed causing troubles. celery -A airflow. I would like to automatically delete these successfull runs if they are a week old or so. But only for finished DRs (SUCCESS and FAILED). Jan 19, 2018 · Select T4, clear downstream+recursive, select subdag, clear just that task - This will re-run the entire subdag (T1-T5) even though T1-T3 were marked as success; Select T4, clear downstream+recursive, select subdag, click run - Same as #2. The patch fixes this by failing the task from the scheduler. 2. Possible options: Possible options: May 22, 2024 · My requirement is to re-trigger airflow task which has been created using EmrContainerOperator every time the task fails. get_task_instance(task_id=task_name) with create_session() as session: clear_task_instances(tis=[task_run Apr 21, 2017 · We remove the Task logs by implementing our own FileTaskHandler, and then pointing to it in the airflow. 2 in MWAA. To clear a task in Airflow, you can use the Airflow UI, CLI, or API. Aug 24, 2017 · You should be able to find entries of this in the task log. *" my_dags. datetime (2021, 1, 1, tz = "UTC"), catchup = False, tags = ["example"],) def tutorial_taskflow_api (): """ ### TaskFlow API Tutorial Documentation This is a simple data pipeline example which demonstrates the use of the TaskFlow API using three simple tasks for Extract, Transform Aug 14, 2024 · After tasks were backfilled and then cleared over the same time period, a clear does not initiate queuing of the tasks. Scenario as below: Task1 - First task in m DAG; Task2 - Run task2 only when task1 has succeeded; Task3 - Run task 3 only when task3 has succeeded; Task4 - Run task 4 only when task1 has run more than 10 hours(SLA missed) Run subsections of a DAG for a specified date range. dag – DAG object The clear method is a function in the custom XCom backend that is responsible for deleting XCom data from the backend storage. Some Airflow commands like airflow dags list or airflow tasks states-for-dag-run support --output flag which allow users to change the formatting of command’s output. Some dags run very frequently (~ every 15 min) generating quite a bit of history. Original point: on_success_callback / on_failure_callback: Depending of whether Task 2 is supposed to run upon success or failure of Task 1, you can pass lambda: time. This feature enhances the readability and manageability of complex workflows in the Graph view by reducing clutter and highlighting structure. [optional] include_past: bool: If set to True, also tasks from past DAG Runs are affected. Go to Browse and click the Task Aug 15, 2020 · Here's an untested code snippet that should help you. dry_run – Find the tasks to clear but don’t clear them. Intention is to create infinite loop and re-trigger the task every time it fails. clear_xcom_data (session = NEW_SESSION) [source] ¶ Clear all XCom data from the database Run subsections of a DAG for a specified date range. decorators import dag, task @dag (schedule = None, start_date = pendulum. The parameters can include the following: Task ID to be cleared (A single task ID) Whether to clear upstream/downstream tasks too. 8. On 'Recent Tasks' press the running icon and Airflow will automatically run the search query with the filters for the Dag Id and State equal to 'running' and show the results on the Task Instances screen (you can find it manually on the tab Browse > Task Instances). 0, I clear WF_DATA_FLOW's task, web go to blank. If that makes any sense at all. Re-runs entire subdag. their process was killed, or the machine died). A teardown task will run if its setup was successful, even if its work tasks failed. Their documentation just states that on_failure_callback gets triggered when a task fails, but if that task fails and is also marked for retry does that mean that both the on_failure_callback and on_retry_callback would be called? Aug 3, 2022 · A human must go and clear A`s status. task (airflow. Mar 28, 2019 · Cleared task instances do not run, but just sit in a "none" state; Attempts to get dag running again fail. Airflow will find these periodically, clean them up, and either fail or retry the Clearing a task instance doesn't delete the task instance record. I readed Airflow 2. Is there a way to "retry all" on these? What I want essentially is to be able to "clear existing tasks" on all of these (causing the scheduler to rerun). local:6379/0 purge -f Aug 8, 2022 · To fix your problem you can try: from airflow. Step 1) Create a DAG with task groups and generate multiple DagRuns (with catchup=True). UPDATE: do NOT use this as pointed out by @Vit. Feb 28, 2020 · As other comments mentioned, I would use caution to make sure you aren't getting into an endless loop of clearing/retries. Default: False-sd, --subdir Dec 17, 2017 · i have a task in an airflow DAG. Name Description-h, --help: Show this help message and exit--clean-before-timestamp <clean_before_timestamp>: The date or timestamp before which data should be purged. I thought I would use google composer later on, but I want it running locally first. As per the base operator code comments::param execution_timeout: max time allowed for the execution of this task instance, if it goes beyond it will raise and fail. Reload to refresh your session. How to reproduce. Teardown tasks are ignored when setting dependencies against task groups. state. timedelta Apr 2, 2023 · For now, what I'm doing is airflow tasks render followed by airflow tasks clear but it is not practical as the render command is only working for one specific execution_date (or run_id). But now, clearing the task instance usually results in the task instance getting stuck in a cleared state. Jan 10, 2010 · airflow. delete_xcom_task = PostgresOperator( task_id='delete-xcom-task', postgres_conn_id='airflow_db', sql="delete from xcom where dag_id=dag. Mar 5, 2019 · UPDATE-1. 1 is to have another DAG running to clear the task in queue state if it stays there for over 30 mins. You switched accounts on another tab or window. cluster. execution_date, reverse=True) dag_run = dag_runs_sorted[0] task_run = dag_run. Apr 11, 2019 · I am running tasks(T1 and T2) in parallel. Dec 27, 2018 · airflow_clear_failed_tasks dag_id execution_data airflow; Share. Obtain list of failed TaskInstances (you can modify this to add filters like dag_id and start_date). Step 3) Clear a specific task group via the web UI. There are multiple options you can select to re-run - Aug 23, 2023 · Apache Airflow version 2. Sep 15, 2021 · To reproduce, create a task with 2 retries that always fails twice and succeeds on the 3rd try; run this task; clear this task; the task will only retry 1 time instead of 2, so it will fail Jul 17, 2023 · In my Airflow GUI I see: The large number of failed runs are due to an issue importing a particular python module. set_downstream(T3) But, getting following error Mapped task index-m, --post-mortem: Open debugger on uncaught exception-S, --subdir <subdir> File location or directory from which to look for the dag. 9 becomes official. 0: Oct 21, 2021 · 【0】Airflowの CLI 1）API仕様 2）基本的な構文 補足：MWAAにおける CLI 【1】cheat-sheet / help 1）cheat-sheet 2）help 【2】dag 1）backfill 2）pause 3）unpause 【3】tasks 1）clear 2）run 【4】connections 1）add 2）list 【5】variables 1）import 【6】airflow CLI あれこれ 1）DAGから airflow CLIを Jun 22, 2020 · I have been trying to clear a task using the following command. I have also setup remote logging, sending logs to S3, but as mentioned in this SO post Removing Airflow task logs this setup does not stop airflow from writing to the local machine. You can combine the clear_task_instances function in built-in module airflow. 3 (latest released) What happened. To clear the task status, go to the Grid View in the Airflow UI, select the task instance you want to To purge all tasks you should execute the following commands on airflow-scheduler in kubectl. cfg'-t, --task-params <task_params> Sends a JSON params dict to the task No system runs perfectly, and task instances are expected to die once in a while. Feb 2, 2021 · It is possible but I would be careful about getting into an endless loop of retries if the task never succeeds. Feb 8, 2019 · I have retry logic for tasks and it's not clear how Airflow handles task failures when retries are turned on. cfg. How do i set a downstream task T3 which depends on both T1 and T2 being finished successfully [T1,T2]. There are multiple options you can select to re-run - Nov 24, 2023 · Apache Airflow version Other Airflow 2 version (please specify below) What happened Task set to run in celery queue was queued but never started on the worker. I often have tasks failing in Airflow and no logs are produced. taskinstance. For Airflow>=2. -s or --start_date specifies the start date for clearing the tasks. Jun 18, 2019 · In every operator we have an execution_timeout variable where you have to pass a datetime. airflow clear -t <task_name> -s <start_date> -e <end_date> <dag_name> eg: airflow clear -t <task_name> -s 2020-06-22 -e 2020-06-22 <dag_name> I have also tried to use start date and end date with all the following combinations: '2020-06-22' '2020-06-22 10:21:23' 2020-06-23T10:28:15 Nov 20, 2024 · Only the task instances within the target task group and the specified DagRun should be cleared. Here are some other ways of introducing delay. Knowing that, I tried this command instead: airflow clear -u -d -f -t ". time range:-e: end_date -s: start_date. dag_run_state – state to set DagRun to. in my situation before 1. Defaults to '[AIRFLOW_HOME]/dags' where [AIRFLOW_HOME] is the value you set for 'AIRFLOW_HOME' config you set in 'airflow. Feb 28, 2021 · Description Allow to clear the whole tasks inside a TaskGroup, instead of doing it one by one. 3. typing_compat. :type execution_timeout: datetime. To rerun a task in Airflow you clear the task status to update the max_tries and current task instance state values in the metastore. Jul 28, 2017 · The tree view in Airflow is "backwards" to how you (and I!) first thought about it. Apr 12, 2018 · However, these tasks only delete logs on the worker, and the scheduler logs are in the scheduler container. utils import State from airflow. In your first screenshot it is showing that "clear_tables" must be run before the "AAAG5608078M2" run task. Feb 22, 2022 · @alltej you are confusing it; AirflowSkipException has to be raised from within your operator's code (and not in your DAG definition code as you are doing here). timedelta object. A maintenance workflow that you can deploy into Airflow to periodically clean out the task logs to avoid those getting too big. [optional] if omitted the server will use the default value of False: include_subdags: bool: Clear tasks in subdags and clear external tasks indicated by ExternalTaskMarker. tis – a list of task instances. json my_dags. For example, to clear a task using the CLI, you can use the airflow tasks clear command: airflow tasks clear -t task_id example_dag This will clear task_id in example_dag, and if task_id is an ExternalTaskMarker, it will also clear the external task it points to. 2. include_subdags -- Clear tasks in subdags and clear external tasks indicated by ExternalTaskMarker. 1. Maybe the most flexible method to re-run tasks non-periodically. my_dag_id. Sep 11, 2023 · Hi Taragolis, for airflow tasks clear in cli, I think it can clear tasks if I offer task regex and dag_id, but it can't clear specific tasks when I offer task_id+run_id+dag_id, which means airflow cli just offers several simple functions, and REST API has similar functions with UI, thanks for your reply, have a nice day~ Aug 17, 2018 · Is there a way to trigger the next task based on previous task run states. include_parentdag – Clear tasks in the parent dag of the subdag. This command clears the state of the failed task instance and only its downstream task instances, allowing them to be re-executed during the next DAG run. 1 and now in 2. There are multiple options you can select to re-run - Setup/ teardown tasks ensure that the necessary resources to run an Airflow task are set up before a task is executed and that those resources are torn down after the task has completed, regardless of any task failures. DagRunState, airflow. Oct 6, 2016 · I'm just getting started with Airbnb's airflow, and I'm still not clear on how/when backfilling is done. Before I started having this trouble, after a cleared a task instance, it would always very quickly get picked up and executed again. Click on the failed task in the Tree or Graph views and then click on Clear. models. Step 2) Add a new task to a specific task group (and also add new tasks to other task groups). GUI: The filters provide lots of dimensions to do search. Reset DAG run to set its state to running. 0 release note and not find anything about privileges changed content. Airflow is a popular open-source workflow orchestration tool that allows you to programmatically author, schedule, and monitor workflows. default. Go to the DAGs screen, where you can see the currently running tasks. Follow asked Dec 27, 2018 at 13:32. clear_task_instances (tis, session, activate_dag_runs = True, dag = None) [source] ¶ Clears a set of task instances, but makes sure the running ones get killed. The try_number of the current task instance is incremented, the max_tries set to 0 and the state set to None, which causes the task to re-run. cfg airflow_variables. dry_run -- Find the tasks to clear but don't clear them. executors. If set to False, dagrun state will not be changed. utils. pool_override – Use the pool_override instead of task’s pool. Literal [False]] = DagRunState. Task(B) and task(A) can run in parallel something like below A-->C B So task(A) has failed and but task(B Jul 1, 2022 · We have a use case where we have to populate fresh data in our DB. So, we overwrite the default LogHandler to keep only N task logs, without scheduling additional DAGs. Clearing a task instance doesn’t delete the task instance record. Deleting from there should only clear the TaskGroups in Apache Airflow enable users to organize tasks within a DAG into visually distinct, hierarchical groups. Thanks for Bolke de Bruin updates on 1. On Airflow 2. Miscellaneous commands airflow cheat-sheet | Display cheat sheet airflow dag-processor | Start a standalone Dag Processor instance airflow info | Show information about current Airflow and environment airflow kerberos | Start a kerberos ticket renewer airflow plugins | Dump information about loaded plugins airflow rotate-fernet-key Oct 8, 2024 · airflow tasks clear --only-downstream --execution-date . 9, currently we are using 1. If no timezone info is supplied then dates are assumed to be in airflow default timezone. Jan 15, 2024 · It worked on Airflow 2. But you can call a bash command as part of your on_failure_callback and then specify which tasks you want to clear, and if you want downstream/upstream tasks cleared etc. This method is called when a task instance is cleared, either from the UI or using the Airflow CLI command airflow tasks clear. 0: There is an option to clean a TaskGroup (see PR) For Airflow<2. If rerun_failed_tasks is used, backfill will auto re-run the previous failed task instances within the backfill date range. ai. One caveat though, this will also clean up the states for the original task runs. it can not change the state of taskB to failed. If you clear a task, its setups and teardowns will be cleared. activate_dag_runs – flag to check for active dag run. Now, if wonder, if there is a known way to clear the statuses of task instances up to a certain task, if some task fails? I know I can use a hook, as in clear an upstream task in airflow within the dag, but that looks a bit ugly It sounds like you need to start a dag from the task where it failed. This makes it unable to proceed and tasks would get stuck. Assuming structure of: taskA >> taskB >> taskC >> taskD then if taskB is successful and taskC failed. Instead, it updates max_tries to 0 and sets the current task instance state to None, which causes the task to re-run. There are three basic kinds of Task: Operators, predefined task templates that you can string together quickly to build most parts of your DAGs. Oct 19, 2021 · First, In Airflow downstream task can not effect upstream task. db import provide_session @provide_session def get_failed_task airflow. Clearing a task instance doesn't delete the task instance record. All reactions airflow. You can call a bash command within the on_retry_callback where you can specify which tasks/dag runs you want to clear. However, Airflow is automatically queuing up this task to run, instead of waiting for me to run airflow backfill . svc. taskinstance import TaskInstance from airflow. clear_task_instances (tis, session, activate_dag_runs = None, dag = None, dag_run_state: Union [airflow. dag_run_state-- state to set DagRun to. Using DAGs Screen; Setting the Airflow Task to a Failed State; Method 1: Using DAGs Screen. There are multiple options you can select to re-run - Apr 17, 2019 · The only workaround I've found until now is to clear the tasks, then mark the dagruns (not the task instances) as successful via UI, and then run the backfill. Select T4, clear downstream+recursive, manually set the subdag to "running" state. But you can reproduce this by using on_failure_callback and clearing all tasks programatically. Also sets Dagrun’s state to QUEUED and start_date to the time of execution. To clear the task status, go to the Grid View in the Airflow UI, select the task instance you want to rerun and click the Clear task button. Note that this existed in both 2. Apr 26, 2017 · In the DAGs screen you can see the running tasks: Example. Jan 10, 2014 · airflow. 0 Also reproduced on 2. Default: False-I, --ignore_first_depends_on_past Ignores depends_on_past dependencies for the first set of tasks only (subsequent executions in the backfill DO respect depends_on_past). Parameters. [optional] include_upstream: bool Skip upstream tasks, run only the tasks matching the regexp. airflow clear -dx occupancy_reports. You can also clear tasks using the Airflow CLI with the airflow tasks clear command. 5. celery_executor -b redis://airflow-redis-service. 11 How to skip task in Airflow operator? Load 7 more related Apr 25, 2022 · Having a separate endpoint with the DAG run ID will allow maintaining consistency with the flow to clear the task through the Airflow UI. Any existing Airflow task can be designated as a setup or teardown task, with special behavior and added visibility of the import json import pendulum from airflow. 3, data_user can only manage DAG WF_DATA_FLOW and can't not access other DAG. Now we need to delete the old data and re run the task. I just opened an issue for that #38342 Oct 6, 2022 · Here is an example and useful flags: airflow tasks clear some_dag -d -e 2022-01-01 -s 2021-12-25 -t some_task. Aug 13, 2019 · I have slack alerts for when tasks fail, but I also want to have recovery messages as well. Use case / motivation One of the things I love about SubDags is the option to clear the entire sub flow in case I want to rerun it. But I have a weird error: airflow: error: unrecognized arguments: airflow-webserver. include_subdags – Clear tasks in subdags and clear external tasks indicated by ExternalTaskMarker. from typing import List, Optional from airflow. lwrou bkgeg gwxlft hmtmz lyqza poz xjka comhehc zrctf nnqmnytx