fix(spring-boot-starter): avoid logging Resource objects

related to CAM-13833, closes camunda#1636

Co-authored-by: Tobias Metzke-Bernstein <tobias.metzke@camunda.com>

spring-boot-starter/starter/src/main/java/org/camunda/bpm/spring/boot/starter/util/SpringBootProcessEngineLogger.java

@@ -22,7 +22,9 @@
 import org.springframework.core.io.Resource;
 
 import java.net.URL;
+import java.util.Objects;
 import java.util.Set;
+import java.util.stream.Collectors;
 
 public class SpringBootProcessEngineLogger extends BaseLogger {
   public static final String PROJECT_CODE = "STARTER";
@@ -54,7 +56,16 @@ public void skipAutoDeployment() {
   }
 
   public void autoDeployResources(Set<Resource> resources) {
-    logInfo("021", "Auto-Deploying resources: {}", resources);
+    // Only log the description of `Resource` objects since log libraries that serialize them and
+    // therefore consume the input stream make the deployment fail since the input stream has
+    // already been consumed.
+    Set<String> resourceDescriptions = resources.stream()
+        .filter(Objects::nonNull)
+        .map(Resource::getDescription)
+        .filter(Objects::nonNull)
+        .collect(Collectors.toSet());
+
+    logInfo("021", "Auto-Deploying resources: {}", resourceDescriptions);
   }
 
   public void enterLicenseKey(String licenseKeySource) {
@@ -74,4 +85,4 @@ public SpringBootStarterException exceptionDuringBinding(String message) {
         "050", message));
   }
 
-}
+}