Correct.The underlying sticking point is the version of Lucene that is used.AEM at its latest (6.5) uses <lucene.version>4.7.1</lucene.version><solr.version>6.6.6</solr.versionIn Apache Solr 7.x [1] there were major changes to the schema.xml, and even further changes in 8.x [2][1] - https://lucene.a...

There were a ton of deprecations in the 6.5 uber jar.  I suggest trying out this build : https://repo.adobe.com/nexus/content/repositories/releases/com/adobe/aem/uber-jar/6.5.0.0/uber-jar-6.5.0.0-apis-with-dep…

You need those FileDataStore configs in place from the first instantiation of AEM. You can't change it after-the-fact. Unpack the JARDrop your configs in the crx-quickstart/install folderStart AEM for the first time.

This thread tells you nothing.You're looking at the wrong things. Look for what's running.java.lang.Thread.State: RUNNABLE

Order isn't guaranteed.The default search implementation of Apache Lucene returns results sorted by score (the most relevant result first), then by id (the oldest result first).Apache Lucene - Scoring

Known issue - CQ-4278585This regression got introduced as AEM switched to a file system based outputcache.That flag no longer works as expected.The resolution for this has been deferred and is not currently in scope to be resolved. But feel free to log a Daycare ticket -- just be sure to fully justi...

Careful using the word "deadlock" as that means something very specific.  I haven't seen a true case of deadlock in aem in quite some time.

BLOCKED threads are symptoms of a problem not the problem itself.You need to look at the RUNNABLE threads over a series of thread dump captures to understand what's causing resource contention.Also use a better way to capture the thread dumps (like the Jstack series script @JaideepBrar suggested). W...

Yes.SVG assets are not streamed by default as a security practice. The mimetype image/svg-xml is blacklisted in the DAM Safe Binary Filter. So you'd need to remove it from the blacklist.If it's still downloading you may need to disable the Apache Sling Content Disposition Filter -- but that's not re...

In addition to We.Retail you can also re-use this reference site : WKND Tutorial Overview GitHub - adobe/aem-guides-wknd: Tutorial Code companion for Getting Started Developing with AEM Sites WKND Tutorial