patch server-UI and TagValueGuard

components/inspectit-ocelot-configurationserver/src/main/java/rocks/inspectit/ocelot/config/FrontendConfiguration.java

@@ -1,7 +1,9 @@
 package rocks.inspectit.ocelot.config;
 
 import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpStatus;
 import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
+import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
 /**
@@ -16,4 +18,14 @@ public void addResourceHandlers(ResourceHandlerRegistry registry) {
                 .addResourceHandler("/ui/**")
                 .addResourceLocations("classpath:/static/ui/");
     }
+
+    @Override
+    public void addViewControllers(ViewControllerRegistry registry) {
+        registry.addRedirectViewController("/ui", "/ui/")
+                .setKeepQueryParams(true)
+                .setStatusCode(HttpStatus.PERMANENT_REDIRECT);
+        registry.addRedirectViewController("/", "/ui/")
+                .setKeepQueryParams(true)
+                .setStatusCode(HttpStatus.PERMANENT_REDIRECT);
+    }
 }

components/inspectit-ocelot-configurationserver/src/main/resources/application.yml

@@ -28,7 +28,6 @@ spring:
 # server properties - see https://docs.spring.io/spring-boot/docs/current/reference/html/appendix-application-properties.html#server-properties
 server:
   port: 8090
-  max-http-header-size: 1MB
 
 inspectit-config-server:
   # the directory which is used as working directory

inspectit-ocelot-core/src/main/java/rocks/inspectit/ocelot/core/metrics/MeasureTagValueGuard.java

@@ -127,10 +127,12 @@
                 Set<String> tagValues = tagValuesByTagKey.computeIfAbsent(tagKey, (x) -> new HashSet<>());
                 // if tag value is new AND max values per tag is already reached
                 if (!tagValues.contains(tagValue) && tagValues.size() >= maxValuesPerTag) {
-                    blockedTagKeysByMeasure.computeIfAbsent(measureName, measure ->  Sets.newHashSet()).add(tagKey);
-                    agentHealthManager.handleInvalidatableHealth(AgentHealth.ERROR, this.getClass(),
-                            String.format(tagOverFlowMessageTemplate, measureName, tagKey));
-                    hasTagValueOverflow = true;
+                    boolean isNewBlockedTag = blockedTagKeysByMeasure.computeIfAbsent(measureName, measure ->  Sets.newHashSet()).add(tagKey);
+                    if(isNewBlockedTag) {
+                        agentHealthManager.handleInvalidatableHealth(AgentHealth.ERROR, this.getClass(),
+                                String.format(tagOverFlowMessageTemplate, measureName, tagKey));
+                        hasTagValueOverflow = true;
+                    }
                 } else {
                     tagValues.add(tagValue);
                 }