- Improve error-handling in "ConnWithController.postShutdownReportToController()".

- Update dependencies.

build.gradle

@@ -1,6 +1,6 @@
 plugins {
     id 'org.springframework.boot' version '2.7.18'
-    id 'io.spring.dependency-management' version '1.1.4'
+    id 'io.spring.dependency-management' version '1.1.5'
     id 'java'
 }
 
@@ -44,7 +44,7 @@ dependencies {
         exclude group: 'io.minio'   // This is not used in the Worker, since it's the Controller which uploads the full-texts to S3. It also includes an older "commons-compress" version which causes problems.
     }
 
-    implementation group: 'com.google.guava', name: 'guava', version: '33.1.0-jre'
+    implementation group: 'com.google.guava', name: 'guava', version: '33.2.0-jre'
 
     // https://mvnrepository.com/artifact/com.google.code.gson/gson
     implementation 'com.google.code.gson:gson:2.10.1'

src/main/java/eu/openaire/urls_worker/components/ConnWithController.java

@@ -6,6 +6,7 @@ import org.springframework.beans.factory.annotation.Value;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Component;
+import org.springframework.web.client.HttpClientErrorException;
 import org.springframework.web.client.HttpServerErrorException;
 import org.springframework.web.client.RestTemplate;
 
@@ -26,8 +27,9 @@ public class ConnWithController {
     public boolean postShutdownReportToController(String workerId)
     {
         logger.info("Going to \"postShutdownReportToController\".");
+        String url = this.controllerBaseUrl + "workerShutdownReport?workerId=" + workerId;
         try {
-            ResponseEntity<String> responseEntity = new RestTemplate().postForEntity(this.controllerBaseUrl + "workerShutdownReport?workerId=" + workerId, null, String.class);
+            ResponseEntity<String> responseEntity = new RestTemplate().postForEntity(url, null, String.class);
             int responseCode = responseEntity.getStatusCodeValue();
             if ( responseCode != HttpStatus.OK.value() ) {
                 logger.error("HTTP-Connection problem with the submission of the \"postShutdownReportToController\"! Error-code was: " + responseCode);
@@ -36,8 +38,17 @@ public class ConnWithController {
         } catch (HttpServerErrorException hsee) {
             logger.error("The Controller failed to handle the \"postShutdownReportToController\": " + hsee.getMessage());
             return false;
+        } catch (HttpClientErrorException hcee) {
+            logger.error("The Worker did something wrong when sending the report result to the Controller. | url: " + url + "\n" + hcee.getMessage());
+            return false;
         } catch (Exception e) {
-            logger.error("Error for \"postShutdownReportToController\" to the Controller.", e);
+            String errorMsg = "Error for \"postShutdownReportToController\", to the Controller.";
+            Throwable cause = e.getCause();
+            String exMsg;
+            if ( (cause != null) && ((exMsg = cause.getMessage()) != null) && exMsg.contains("Connection refused") )
+                logger.error(errorMsg + " | The Controller has probably crashed, since we received a \"Connection refused\" message!");
+            else
+                logger.error(errorMsg, e);
             return false;
         }
         return true;

src/main/java/eu/openaire/urls_worker/controllers/GeneralController.java

@@ -73,7 +73,7 @@ public class GeneralController {
             finalMsg = "The worker has already received a \"shutdownWorker\" request (which was not canceled afterwards). ";
         else {
             shouldShutdownWorker = true;
-            AssignmentsHandler.shouldNotRequestMore = true;
+            AssignmentsHandler.shouldNotRequestMore = true; // Make sure the worker shuts-down, in case the user sends the relevant request, while the worker is stuck in a data-request error-loop.
         }
 
         finalMsg += "The worker will shutdown, after finishing current work.";
@@ -92,7 +92,7 @@ public class GeneralController {
 
         shouldShutdownWorker = false;
         if ( AssignmentsHandler.numHandledAssignmentsBatches < assignmentsHandler.maxAssignmentsBatchesToHandleBeforeShutdown )
-            AssignmentsHandler.shouldNotRequestMore = false;    // Make sure the worker shuts-down, in case the user sends the relevant request, while the worker is stuck in a data-request error-loop.
+            AssignmentsHandler.shouldNotRequestMore = false;
 
         String finalMsg = "Any previous \"shutdownWorker\"-request is canceled. The \"maxAssignmentsBatchesToHandleBeforeShutdown\" will still be honored (if it's set).";
         logger.info(initMsg + finalMsg);