plugin service allow multiple extended plugins both extend the same module/plugin

Signed-off-by: Karen X <[email protected]>

Author: karenyrx

CHANGELOG.md

@@ -33,6 +33,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Allow the truncate filter in normalizers ([#19778](https://github.com/opensearch-project/OpenSearch/issues/19778))
 - Support pull-based ingestion message mappers and raw payload support ([#19765](https://github.com/opensearch-project/OpenSearch/pull/19765))
 - Support dynamic consumer configuration update in pull-based ingestion ([#19963](https://github.com/opensearch-project/OpenSearch/pull/19963))
+- Relax jar hell check when extended plugins share transitive dependencies ([#20103](https://github.com/opensearch-project/OpenSearch/pull/20103))
 
 ### Changed
 - Faster `terms` query creation for `keyword` field with index and docValues enabled ([#19350](https://github.com/opensearch-project/OpenSearch/pull/19350))

server/src/main/java/org/opensearch/plugins/PluginsService.java

@@ -728,8 +728,11 @@ static void checkBundleJarHell(Set<URL> classpath, Bundle bundle, Map<String, Se
                 Set<URL> intersection = new HashSet<>(urls);
                 intersection.retainAll(pluginUrls);
                 if (intersection.isEmpty() == false) {
-                    throw new IllegalStateException(
-                        "jar hell! extended plugins " + exts + " have duplicate codebases with each other: " + intersection
+                    logger.info(
+                        "Plugin [{}] extends multiple plugins/modules that share common dependencies: {}. "
+                            + "This is expected when extended plugins share common ancestors.",
+                        bundle.plugin.getName(),
+                        intersection
                     );
                 }