Region Not Found with Spring Boot due to Java 11 ForkJoinPool `ClassLoader` change about spring-data-geode

[gidxl03]

Many thanks John for the rapid turnaround, prolific as ever!

EOL notice for SDG is noted.

I've benefited from your many detailed stackoverflow explanations over the years and want to say thanks for that too :)

[jxblum]

Thank you for reporting this issue.

NOTE: Spring Data for Apache Geode (SDG) is nearing its OSS EOL, as of November 2023 (see here for complete details). SDG, and by extension, Spring Boot for Apache Geode, will no longer receive updates without purchasing commercial support (through a VMware Spring Runtime license). As such, you are encouraged to replace Spring Data for Apache Geode with Spring Data for VMware GemFire where, and as soon as possible.

Having noted the above statement, I am going to make 2 changes to SDG.

1. First, I am going to add componentProvider.setResourceLoader(new DefaultResourceLoader(getEntityClassLoader()));

2. Then, I am going to make the parallelization of the stream(..) used for classpath component scanning configurable (using a new, hidden Spring Data Geode property, "spring.data.gemfire.classpath.scan.parallel"), defaulting to false.

With 2, users can set this property in Spring Boot's application.properties since the value is resolved from the Spring Environment.

Given the core Spring Framework, Spring Container's (prior) bean indexing capabilities, and now comprehensive AOT (eventual CrAC and Projet Leydon support) it is not strictly necessary to parallelize the classpath component scan. In fact, by default, it should not.

Still, if users need this capability, then it is a simple matter to configure this behavior using the new property from #2 above.

[jxblum]

Fortunately, this fix will go out tomorrow, during our regularly scheduled Spring Data releases.

[jxblum]

Thank you for the kind feedback. Wishing you all the best.