Cron schedule is being duplicated

[udovicic]

Preconditions (*)

1. Create empty Magento project using composer create-project --repository-url=https://repo.magento.com/ magento/project-community-edition:2.2.7 .
2. Install with something like following: php bin/magento setup:install --base-url="http://www.example.com/" --db-host="db" --db-name="..." --db-user="..." --db-password="..." --admin-firstname="Admin" --admin-lastname="Admin" --admin-email="admin@example.com" --admin-user="admin" --admin-password="..." --language="en_US" --currency="EUR" --timezone="Europe/Zagreb" --use-rewrites="1" --backend-frontname="admin". This is actually blank installation, but lets document just in case.

Steps to reproduce (*)

1. php bin/magento cron:run
2. php bin/magento cache:flush
3. (not sure, but i think you need to wait for 1 min)
4. php bin/magento cron:run
5. Execute following on the database: SELECT count(*), job_code, scheduled_at FROM `cron_schedule` GROUP BY job_code, scheduled_at ORDER BY `count(*)` DESC

Expected result (*)

1. There are no duplicate cron jobs

Actual result (*)

1. Cron jobs are being duplicated: Same job code at the same time exists multiple times

Note:

This has been reported few times before, but issue has been closed with note that new one should be opened if it still persists.

[magento-engcom-team]

Hi @udovicic. Thank you for your report.
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@udovicic do you confirm that you was able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

[magento-engcom-team]

Hi @engcom-backlog-nazar. Thank you for working on this issue.
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Hi @udovicic this is expected behavior, if you have a job that runs every time like * * * * *, magento create a few rows for this job. this is not publicated rows.

[udovicic]

Hi @engcom-backlog-nazar ,

If you repeat steps 1. - 4. few times, more duplicated rows appear, for an example:

count	job_codeJob Code	scheduled_at
2	indexer_update_all_views	2019-02-21 10:02:00
2	sales_send_order_invoice_emails	2019-02-21 10:02:00
2	sales_grid_order_invoice_async_insert	2019-02-21 10:02:00
2	catalog_product_outdated_price_values_cleanup	2019-02-21 10:02:00
2	sales_send_order_creditmemo_emails	2019-02-21 10:02:00
2	indexer_reindex_all_invalid	2019-02-21 10:01:00
2	outdated_authentication_failures_cleanup	2019-02-21 10:02:00
2	sales_grid_order_shipment_async_insert	2019-02-21 10:02:00
2	catalog_product_frontend_actions_flush	2019-02-21 10:02:00
2	sales_send_order_shipment_emails	2019-02-21 10:02:00
2	indexer_reindex_all_invalid	2019-02-21 10:02:00
2	sales_grid_order_creditmemo_async_insert	2019-02-21 10:02:00
2	magento_newrelicreporting_cron	2019-02-21 10:02:00
2	sales_send_order_emails	2019-02-21 10:02:00
2	sales_grid_order_async_insert	2019-02-21 10:02:00
2	indexer_update_all_views	2019-02-21 10:01:00
1	sales_grid_order_creditmemo_async_insert	2019-02-21 10:22:00
1	sales_send_order_creditmemo_emails	2019-02-21 10:16:00
1	sales_send_order_emails	2019-02-21 10:04:00
1	sales_grid_order_async_insert	2019-02-21 10:04:00
1	indexer_update_all_views	2019-02-21 10:07:00
1	outdated_authentication_failures_cleanup	2019-02-21 10:12:00
1	sales_send_order_emails	2019-02-21 10:20:00
1	sales_grid_order_async_insert	2019-02-21 10:20:00
1	magento_newrelicreporting_cron	2019-02-21 10:08:00

Most of them are the cases that you have mentioned above, but one of the rows that also showed for me is:

<job name="magento_newrelicreporting_cron" instance="Magento\NewRelicReporting\Model\Cron" method="runCron">
    <schedule>*/2 * * * *</schedule>
</job>

Just an example to show, but I do not think that one should be duplicated.

@udovicic on you screen you have 2 defferent job starting at the same time waths wrong here ?

[udovicic]

@engcom-backlog-nazar That is not correct, if you check the SQL from description, you will notice that first column shows number of occurrences. Meaning that there is only one job magento_newrelicreporting_cron scheduled for 2019-02-21 10:08:00, but for 2019-02-21 10:02:00 it is scheduled two times.

[magento-engcom-team]

✅ Confirmed by @engcom-backlog-nazar
Thank you for verifying the issue. Based on the provided information internal tickets MAGETWO-98358, MAGETWO-98359 were created

Issue Available: @engcom-backlog-nazar, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.