ACS-AEM-Generic list- 500 Error thrown | Community
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N
NitroHazeDev
Level 9
April 25, 2022

ACS-AEM-Generic list- 500 Error thrown

  • April 25, 2022
  • 3 replies
  • 4281 views

All,

 

Is there a limit to the number of items in an ACS Commons generic list . The page just appears blank and a 500 error is thrown. Limiting to 6 entries or 4 helps. Anyway i can get around the issue? I am on aem 6.5.8 

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3 replies

Ravi_Pampana
Community Advisor
Ravi_PampanaCommunity Advisor
Community Advisor
April 25, 2022

Hi,

 

I don't see any limitation , did you see any errors in logs? As per implementation it seems to be a straight forward of reading the values from a specific node. Can you check any if any of the special characters in the value is causing the issue.

    N
    NitroHazeDevAuthor
    Level 9
    April 25, 2022

    Totally, that is what makes me wonder, I see a Null pointer Exception but very unclear and version 4.10.0 acs commons. It does not appear to be special char issue
    ERROR- GET /mnt/overlay/acs-commons/components/utilities/genericlist.html-    org.apache.sling.engine.impl.SlingRequestProcessorImpl service: Uncaught SlingException 

    java.lang.NullPointerException: null
    WARN - GET /mnt/overlay/acs-commons/components/utilities/genericlist.html- org.apache.sling.engine.impl.SlingHttpservletresponseImpl Response already committed. Failed to set status code from 200 to 500. 


    Updated- I did set up debug logging and found out NPE at 
    org.apache.sling.rewriter.impl.ProcessorConfigurationImpl.match(ProcessorConfigurationImpl.java:465)

    at org.apache.sling.rewriter.impl.RewriterResponse.getProcessor(RewriterResponse.java:170) 
    and more

     

     

     

     

    I also tried reducing entries to 4 and it worked fine. I see people complain of this online 
    https://github.com/Adobe-Consulting-Services/acs-aem-commons/issues/2503
    https://stackoverflow.com/questions/68460284/aem-acs-commons-generic-list-editor-breaks-when-more-than-8-items-are-added

    However , i see nothing with rewriter config in logs .. unsure how i could debug further

      Ravi_Pampana
      Community Advisor
      Ravi_PampanaCommunity Advisor
      Community Advisor
      April 26, 2022

      I am able to replicate the issue when adding below below string to either title or value field

       

      #!!@#$%^&*())_?><"L"'{

       

      Getting below exception in logs

       

      Caused by: java.lang.NullPointerException: null
      25.04.2022 21:50:06.503 *ERROR* [[0:0:0:0:0:0:0:1] [1650948606483] GET /mnt/overlay/acs-commons/components/utilities/genericlist.html HTTP/1.1] org.apache.sling.engine.impl.SlingRequestProcessorImpl service: Uncaught SlingException

      While checking acs-commons seems to be with below code

      /apps/acs-commons/components/utilities/genericlist/list.json.jsp 

      Not able to create json attribute correctly. 

        DEBAL_DAS
        DEBAL_DAS
        New Member
        April 26, 2022

        I have tried with below combinations to replicate the issue-

        1. Adobe Experience Manager 6.5.11.0 and acs-commons 5.2.0 as shown below -

         

        Created a generic list with 21 entries but I didn't face the above issue -

        2. Adobe Experience Manager 6.5.9.0 and acs-commons 4.10.0 as shown below -

         

        Created a generic list with 15 entries but I didn't face the above issue -

         

        But we faced this issue in our last project. I will keep you posted with AEM and acs common version.

        Debal Das, Senior AEM Consultant
          N
          NitroHazeDevAuthor
          Level 9
          April 26, 2022

          Hi @debal_das 

          Thank you for your help with this.

          As mentioned this is not a problem on local instance as many have noted but on higher env .Please find the links shared for more details. Assumed Rewriter is the culprit, but that solved the issue momentarily. Attached logs

            DEBAL_DAS
            DEBAL_DAS
            New Member
            April 27, 2022

            @nitrohazedev ,

             

            I haven't received reply yet on AEM and acs common version.

            I can recall few things , we were using AEM 6.5.5 and initial acs commons version was 4.3.2

             

            We took the decision to upgrade acs commons version then we faced this issue (page just appears blank , a 500 error is thrown and null pointer exception) after upgrade. We had these issues on QA and local instances as well.

             

            After several trying we just reverted to previous acs commons version[4.3.2].

            Debal Das, Senior AEM Consultant
              A
              akashdeepAEM
              Level 3
              July 8, 2022

              Hi @nitrohazedev ,
              cc @ravi_pampana @debal_das 
              Issue: acs commons generic lists with more than 8 items gives 500. 

              I am able to reproduce the issue with latest acs-commons 5.3.2 on latest AEM 6.5.13 having /apps/<project>/config/rewriter.

               

              Note: 4.3.2 is a working version of acs-commons which supports classic and does not has this generic-lists issue. 

              Update : ACS Commons Generic Lists 500 error issue is fixed with ACS-Commons v-5.3.4 and above.

              https://github.com/Adobe-Consulting-Services/acs-aem-commons/commit/5d4de1e8d7e77c880da320a1508a33a9759c6799


              Thanks


                N
                NitroHazeDevAuthor
                Level 9
                July 8, 2022

                Hi @akashdeepaem  , 4.3.2 may be the best, but compatibility wise there were issues with 6.5 , so we had to bump it up. We do not have any config/rewriter node to rename or temporarily delete. I hope this issue with varying fixes per acs version, where a solution works for one does not work for the other gets resolved at the root itself- i.e. ACS... I haven't had the time to debug it myself.

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