Dispatcher flush not working in publish mode

[kavinManickam]

Required Information

• [ ] AEM Version, including Service Packs, Cumulative Fix Packs, etc:AEM version 6.5, Service Pack - 6.5.14
• [ ] ACS AEM Commons Version: 6.0.8
• [ ] Reproducible on Latest? yes

Expected Behavior

On configuring Agents on author for author instance and agents on publish for publish instance should be able to flush dispatcher successfully

Actual Behavior

In publish instance on dispatcher flush page load null pointer exception is observed in logs.

[2023-05-30 11:26:13,735][ERROR][[0:0:0:0:0:0:0:1] [1685512573724] GET /etc/acs-commons/dispatcher-flush/dispatcher-flush.html HTTP/1.1][org.apache.sling.scripting.sightly.render.ObjectModel] Cannot access method results on object [com.adobe.acs.commons.replication.dispatcher.impl.DispatcherFlushModelImpl@1f03504a](mailto:com.adobe.acs.commons.replication.dispatcher.impl.DispatcherFlushModelImpl@1f03504a)

Caused by: java.lang.NullPointerException: null
    at java.base/java.util.Objects.requireNonNull(Objects.java:221)
    at java.base/java.util.Arrays$ArrayList.<init>(Arrays.java:4323)
    at java.base/java.util.Arrays.asList(Arrays.java:4310)
    at com.adobe.acs.commons.replication.dispatcher.impl.DispatcherFlushModelImpl.getResults(DispatcherFlushModelImpl.java:82)

This in return is failing to create CSRF token resulting in 403 error.

[2023-05-30 11:04:50,072][INFO][qtp1034367768-96][log.request] 30/May/2023:11:04:50 +0530 [36] -> POST /etc/acs-commons/dispatcher-flush/dispatcher-flush/_jcr_content/configuration.flush.html HTTP/1.1
[2023-05-30 11:04:50,072][INFO][[0:0:0:0:0:0:0:1] [1685424890072] POST /etc/acs-commons/dispatcher-flush/dispatcher-flush/_jcr_content/configuration.flush.html HTTP/1.1][com.adobe.granite.csrf.impl.CSRFFilter] isValidRequest: empty CSRF token - rejecting
[2023-05-30 11:04:50,072][INFO][[0:0:0:0:0:0:0:1] [1685424890072] POST /etc/acs-commons/dispatcher-flush/dispatcher-flush/_jcr_content/configuration.flush.html HTTP/1.1][com.adobe.granite.csrf.impl.CSRFFilter] doFilter: the provided CSRF token is invalid
[2023-05-30 11:04:50,152][INFO][qtp1034367768-96][log.request] 30/May/2023:11:04:50 +0530 [36] <- 403 text/html 80ms
[2023-05-30 11:04:50,153][INFO][qtp1034367768-96][log.access] [0:0:0:0:0:0:0:1] - admin 30/May/2023:11:04:50 +0530 "POST /etc/acs-commons/dispatcher-flush/dispatcher-flush/_jcr_content/configuration.flush.html HTTP/1.1" 403 11081 "[http://localhost:4503/etc/acs-commons/dispatcher-flush/dispatcher-flush.html/flush/true"](http://localhost:4503/etc/acs-commons/dispatcher-flush/dispatcher-flush.html/flush/true%22) "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36"

Steps to Reproduce

Starting from vanilla instance,

1. please install service pack 6.5.14 2.Install ACS commons version 6.0.8
2. Configure Apache-22 dispatcher at any port( localhost:80) 4.Configure Agents in author for author and Agents in Publish for publish with dispatcher configuration

Links

https://archive.apache.org/dist/httpd/

[davidjgonzalez]

@kavinManickam Can you explain this a bit more? Are you running this on. AEM Author or on AEM Publish?

The idea with this tool is would setup agents that can flush dispatcher from AEM Author, not running the UI on Publish and flushing from there.

[kavinManickam]

@davidjgonzalez We are currently installing this on both instances but dispatcher flush is mainly used in publish. The idea here is to setup flush UI in publish and configure "Agents on publish" to flush the dispatcher. This was working with previous ACS versions up to 5.7.0. The main reason to use it in publish is so that the flush paths and flushing method could not be edited.

[davidjgonzalez]

@kavinManickam can you see if updating your configuration.html to the following works?

https://github.com/Adobe-Consulting-Services/acs-aem-commons/blob/695ccc812f7248c102d0b2c8c25b917e0421a333/ui.apps/src/main/content/jcr_root/apps/acs-commons/components/utilities/dispatcher-flush/configuration/configuration.html

I assume youre logged into AEM Publish to execute this right? And you've permissioned the pages so others can flush your cache?

[kavinManickam]

Hi @davidjgonzalez , I tried updating my configuration.html as mentioned above and it is working as expected. I logged in Publish to execute this as well as in author mode. Other members were also able to flush the dispatcher in Publisher

[davidjgonzalez]

Thanks for confirming @kavinManickam ! well get this merged and released!