DAM OOTB Renditions not created.

[Deepikaa_Banuma]

Hi,

We are  uploading assets to DAM using JCROM API. We also have one custom workflow in AEM (6.1) which runs after a delay of 5 sec from the time of asset upload. Sometimes (not always) after image upload DAM OOTB asset workflow doesn't create renditions and it throws below error.

05.05.2016 08:15:18.727 *ERROR* [JobHandler: /etc/workflow/instances/server0/2016-05-03/model_3015090651838815:/content/dam/test/markets/global/en-gb/news/2016/1860x1050_5thmay.jpg/jcr:content/renditions/original] com.day.cq.dam.core.impl.gfx.CommonsGfxRenderer Could not render: wid=48&hei=48&fit=constrain,1&fmt=png-alpha&layer=comp&layer=0&src=/content/dam/test/markets/global/en-gb/news/2016/1860x1050_5thmay.jpg
java.lang.NullPointerException: null
    at com.day.cq.dam.core.impl.cache.CQBufferedImageCache.getCacheKey(CQBufferedImageCache.java:358)
    at com.day.cq.dam.core.impl.cache.CQBufferedImageCache.getImage(CQBufferedImageCache.java:101)
    at com.day.cq.dam.core.impl.gfx.CommonsGfxRenderer.createImageLayer(CommonsGfxRenderer.java:460)
    at com.day.cq.dam.core.impl.gfx.CommonsGfxRenderer.createLayer(CommonsGfxRenderer.java:138)
    at com.day.cq.dam.core.impl.gfx.CommonsGfxRenderer.render(CommonsGfxRenderer.java:91)
    at com.adobe.cq.gfx.impl.GfxImpl.render(GfxImpl.java:94)
    at com.day.cq.dam.core.impl.RenditionMakerImpl$PlanBasedTemplate.apply(RenditionMakerImpl.java:127)
    at com.day.cq.dam.core.impl.RenditionMakerImpl.generateRenditions(RenditionMakerImpl.java:184)
    at com.day.cq.dam.core.process.CreateThumbnailProcess.createThumbnails(CreateThumbnailProcess.java:119)
    at com.day.cq.dam.core.process.ThumbnailProcess.execute(ThumbnailProcess.java:76)
    at com.day.cq.workflow.compatibility.CQWorkflowProcessRunner.execute(CQWorkflowProcessRunner.java:93)
    at com.adobe.granite.workflow.core.job.HandlerBase.executeProcess(HandlerBase.java:184)
    at com.adobe.granite.workflow.core.job.JobHandler.process(JobHandler.java:232)
    at org.apache.sling.event.impl.jobs.JobConsumerManager$JobConsumerWrapper.process(JobConsumerManager.java:512)
    at org.apache.sling.event.impl.jobs.queues.JobRunner.run(JobRunner.java:205)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

Thanks,

Deepikaa

[Tuhin_Ghosh]

Hi Deepikaa,

Since you are using custom workflow, could you set a debug point in your workflow and see from where the null pointer exception is coming. It looks like the workflow is triggered but because of some problem a null pointer exception is thrown. 

Debug > Indentify > handle the exception.

Please let us know if you are able to point out the issue after debugging.

Thanks

Tuhin

[Lokesh_Shivalingaiah]

what is the custom workflow you are running in 5sec delay ?

can you make it to 1min delay and see if you face this issue ?

[Tuhin_Ghosh]

Good catch (as always). Might be within that time all the resources are not getting available. 

@Deepikaa, Please try what Loki has mentioned.

Thanks

Tuhin

[Deepikaa_Banuma · Accepted solution]

Hi,

Actually custom workflow isn't causing any issue. I just went to the line of code  in com.day.cq.dam.core.impl.cache.CQBufferedImageCache which was throwing null pointer .It was all about fetching properties of the asset.

As i was creating image nodes using jcrom api, tags property ( empty string []) was getting added which was causing the issue.

If tags property is there,we also need to have cq:taggable mixin else it throws this error.

Thanks,

Deepikaa

[Tuhin_Ghosh]

cheers