Unable to Push-publish new pages

[fabrizzio-dotCMS]

Describe the bug

Basically when Push-publishing New Pages
You'll see a NullPointer Exception that is originated in the class ContentHandler.java

by the following code:

Approx line 534:

// pushing live content requires some cleanup we have on contentletAPI.publish
	                if(implicitPublish) {
	                    content = contentletAPI.findContentletByIdentifier(content.getIdentifier(), false, content.getLanguageId(), systemUser, false);
	                    contentletAPI.publish(content, systemUser, false);
	                }

New Pages aren't found on the destination environment causing a NPE when publish is attempted.

Steps to reproduce the behavior:

1. Set up a Push Publishing environment.
2. Create an HTML Page, and push it to the receiver.
3. The New Pages are not passing. instead, you'll see an NPE on the logs.

The error looks like this:

11:04:07.297  ERROR handler.ContentHandler - Error on File /Users/fabrizzio/code/servers/server2/assets/bundles/01E32PEDZAQ26QSBP5G68QJZRT/working/demo.dotcms.com, content id:(empty) :null
java.lang.NullPointerException: null
	at com.dotcms.content.elasticsearch.business.ESContentletAPIImpl.publish_aroundBody30(ESContentletAPIImpl.java:559) ~[dotcms_5.0.0_a933c1b.jar:?]
	at com.dotcms.content.elasticsearch.business.ESContentletAPIImpl$AjcClosure31.run(ESContentletAPIImpl.java:1) ~[dotcms_5.0.0_a933c1b.jar:?]

But I've seen it fail silently also.

Expected behavior

The system should be capable of Push-publishing Both New Pages as well as existing pages to the receiver.

Additional context

Add any other context about the problem here.

Acceptance Criteria

1. Multilanguage
2. Unit test

[erickgonzalez]

PR: https://github.com/dotCMS/enterprise-2.x/pull/722

[bryanboza]

Fixed, tested on release-5.2.8 // Postgres // FF