fix: recursive method call may lead to stack overflow exception

fixes AM-3317

gravitee-node-container/src/main/java/io/gravitee/node/container/spring/env/AbstractGraviteePropertySource.java

@@ -18,6 +18,8 @@
 import io.gravitee.node.api.secrets.resolver.PropertyResolver;
 import io.gravitee.node.api.secrets.resolver.PropertyResolverFactoriesLoader;
 import io.gravitee.node.api.secrets.resolver.WatchablePropertyResolver;
+import io.reactivex.rxjava3.core.Flowable;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 import java.util.Arrays;
 import java.util.Map;
 import java.util.Objects;
@@ -80,9 +82,10 @@ public Object getProperty(String name) {
     protected abstract Object getValue(String key);
 
     private void watchProperty(WatchablePropertyResolver<?> propertyResolver, String name, Object value) {
-        propertyResolver
-            .watch(value.toString())
-            .doOnComplete(() -> watchProperty(propertyResolver, name, value))
+        Flowable
+            .defer(() -> propertyResolver.watch(value.toString()))
+            .subscribeOn(Schedulers.io())
+            .repeat()
             .subscribe(newValue -> source.put(name, newValue), t -> LOGGER.error("Unable to update property {}", name, t));
     }