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Kengo Seki edited comment on AIRFLOW-1172 at 5/22/17 3:20 PM: -------------------------------------------------------------- This is a limitation of croniter rather than Airflow. [I'd sent a PR to croniter, and now it's merged and released as 0.3.17|https://github.com/taichino/croniter/pull/84]. So just updating croniter enables this feature. was (Author: sekikn): This is a limitation of croniter rather than Airflow. [I'd send a PR to croniter, and now it's merged and released as 0.3.17|https://github.com/taichino/croniter/pull/84]. So just updating croniter enables this feature. > CroniterNotAlphaError: [0 20 * * 1#1] is not acceptable > ------------------------------------------------------- > > Key: AIRFLOW-1172 > URL: https://issues.apache.org/jira/browse/AIRFLOW-1172 > Project: Apache Airflow > Issue Type: Bug > Components: DagRun, scheduler > Affects Versions: 1.8.0 > Environment: Docker base image: `python:2.7-slim` > Reporter: Nico Arianto > Assignee: Kengo Seki > Labels: scheduling > > Based on the > [dag-runs|https://airflow.incubator.apache.org/scheduler.html#dag-runs] > documentation that we can refer to [cron > expression|https://en.wikipedia.org/wiki/Cron#CRON_expression] as a str which > in `Day of week` allows special character hash (`#`). > Unfortunately Airflow:1.8.0 doesn't support special character hash which in > my case we need to specify the DAG run to only triggers every 1st Tuesday of > the month. -- This message was sent by Atlassian JIRA (v6.3.15#6346)