org.apache.sling.event.impl.jobs.JobManagerImpl Discarding job - properties must be serializable: job/topic

Question

Hello,

I am getting an exception when processing DamEvent events on my Job manager that implements EventHandler. I am using code guidelines from references below. My code works fine when processing PageEvent but it does not process the job for DamEvent.

public static final String JOB_TOPIC = "aem/solr/indexing/job";

final Map<String, Object> payload = new HashMap<String, Object>();

DamEvent damEvent = DamEvent.fromEvent(event);

payload.put("damEvent", damEvent);

jobManager.addJob(JOB_TOPIC, payload);

** It works when using PageEvent pageEvent = PageEvent.fromEvent(event);

In the error log I see this exception on DamEvent events:

the 23.06.2023 16:43:12.938 *WARN* [EventAdminThread #20] org.apache.sling.event.impl.jobs.JobManagerImpl Discarding job - properties must be serializable: aem/solr/indexing/job : {damEvent=com.day.cq.dam.api.DamEvent@733fc832}

I see this note in the Sling documentation which I don't quite understand: "The job topic follows the conventions for the topic of an OSGi event. All objects in the payload must be serializable and publically available (exported by a bundle). This is required as the job is persisted and unmarshalled before processing."

Also, I see there is a checkJob in the API (https://github.com/apache/sling-org-apache-sling-event/blob/master/src/main/java/org/apache/sling/event/impl/jobs/Utility.java) which describes the exception I am getting.

Is this a bug? I am working on AEM 6.5.15.0

References:

https://sling.apache.org/documentation/bundles/apache-sling-eventing-and-job-handling.html

https://sling.apache.org/documentation/tutorials-how-tos/how-to-manage-events-in-sling.html

DPrakashRaj · Accepted Answer

By default objects on aem are not serialized and your payload need to be serialized as explained on https://sling.apache.org/documentation/bundles/apache-sling-eventing-and-job-handling.html

you need to deserialized your payload object(damevent)as explained https://helpx.adobe.com/experience-manager/kb/deserialization-not-allowed-error.html

https://www.linkedin.com/pulse/aem-sling-jobs-processed-nurbek-umirov

Tanika02 · Answer

Hello @lucas_reyes -  As per the Apache Sling documentation :  All objects in the payload of a job must be serializable. This is because the job is persisted and unmarshalled before processing. Serialization allows the objects to be converted into a format that can be stored and reconstructed later. Issue : You are trying to add it directly to the payload using payload.put("damEvent", damEvent);. However, the DamEvent class might not implement the Serializable interface, causing the serialization error.  import java.io.Serializable;public class CustomDamEventData implements Serializable {    // Define necessary fields to hold the extracted information from DamEvent    private String eventId;    private String eventPath;        // Constructors, getters, and setters for the fields    // ...    @Override    public String toString() {        return "CustomDamEventData{" +                "eventId='" + eventId + '\'' +                ", eventPath='" + eventPath + '\'' +                '}';    }}

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