Dispatcher Cache Root in Local

[Ankan_Ghosh]

I am running the dispatcher using docker on my local Windows machine. Can anyone tell me where can I find the cache folder? I need to change some cache rules and check whether it is being applied successfully or not. 

Also how to change this cache root in local ?

[aanchal-sikka]

@Ankan_Ghosh 

• Cache :
  • defined by: /docroot property in farm file
  • default location for AEMaaCS SDK’s docker image: /mnt/var/www/html

The following blog covers multiple important aspects around dispatcher set-up via docker

https://techrevel.blog/2023/08/28/navigating-aem-dispatcher-setup-farm-file-resolution-and-variable-...

[Ankan_Ghosh]

Thanks for the reply. But where is this mnt/var/www/html being created in the local directory?

How do I check the files that are cached? 

[aanchal-sikka]

@Ankan_Ghosh 

Option-1:

I don't have a docker locally, so sharing the screenshots from internet.

- Go to Images

- Click on the vertical ellipses corresponding to your image. 

- Select "Open in terminal". You should be able to access logs at /mnt/var/www/html 

Option-2: To access via power shell.

https://www.youtube.com/watch?v=o5ycGE2bGIg

[Ankan_Ghosh]

Tried to access the file from the terminal but seems like nothing is in it

Please correct me if I am doing anything wrong.

[aanchal-sikka]

@Ankan_Ghosh 

- Please check the /docroot value defined in farm file.

- PLease enable debug mode in the logs and check the cache logs

Define DISP_LOG_LEVEL debug

How a detailed cache log should look like is available here: Deep-dive into AEM dispatcher’s cache flush strategies – Adobe Experience Manager Blog (techrevel.bl...

[aashishdimri2002]

Hey @Ankan_Ghosh,

Getting the same problem.

Do you have any solution for the problem 

[Ankan_Ghosh]

I haven't been able to find any solution yet.

[arunpatidar]

Hi @Ankan_Ghosh 
It will be inside the dispatcher sdk folder, if you are using AEM as a cloud SDK

[Ankan_Ghosh]

I am on a Windows Machine and the cache folder is not being generated inside the Dispatcher Folder. Content is being served but I am not able to see how things are being cached. My main motive is to understand how things are cached and in what order. 

[arunpatidar]

Hi @Ankan_Ghosh 
Maybe the cache is not working as expected, please check your configurations.
As @aanchal-sikka  mentioned, you would be able to see the cache from terminal which opens within container.

[Urmila]

Hi @Ankan_Ghosh Were you able to resolve the issue, as I am also facing the same issue?

[Ankan_Ghosh]

No. I am still unable to resolve it.

[Ankan_Ghosh · Accepted solution]

Finally, I have found the answer to this question. 

I checked for the volume mappings for my running Docker container using this command 

docker inspect <container_id>

In the output you should see a "Mounts" section which looks something like this :

"Mounts": [
{
"Type": "bind",
"Source": "C:\\Users\\myUser\\Files\\AEMMainInstance\\dispatcher\\bin\\..\\lib",
"Destination": "/usr/lib/dispatcher-sdk",
"Mode": "ro",
"RW": false,
"Propagation": "rprivate"
},{
"Type": "bind",
"Source": "C:\\Users\\myUser\\Files\\AEMMainInstance\\dispatcher\\src",
"Destination": "/mnt/dev/src",
"Mode": "ro",
"RW": false,
"Propagation": "rprivate"
},

]

There was no "mount" defined for the path "/mnt/var/www/html" which is the path to my docroot. So, I changed the docer_run.cmd script to add a new mount to specify the mapping for "/mnt/var/www/html". 

Add this line in your docker_run.cmd and it will add the mount for you.

set volumes=-v C:\Users\yourUser\Files\AEMMainInstance\dispatcher\cache:/mnt/var/www/html:rw !volumes!

Restart your docker and try to hit a page from your dispatcher. And you check your local directory that you used for mapping to see how the caching is happening.

[Ankan_Ghosh]

 @aashishdimri2002  @Urmila  You guys can try this and see if it helps.