modules/account/src/main/scala/de/nowchess/account/resource/OfficialChallengeResource.scala

@@ -79,7 +79,7 @@ class OfficialChallengeResource:
                   Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(ErrorDto(err)).build()
                 case Right(id) =>
                   try botEventPublisher.publishGameStart(bot.name, id, botColor, difficulty, bot.id.toString)
-                  catch case ex: Exception => log.warnf(ex, "Failed to notify bot for game %s", id)
+                  catch case ex: Exception => log.errorf(ex, "Failed to notify bot for game %s", id)
                   Response
                     .status(Response.Status.CREATED)
                     .entity(OfficialChallengeResponse(id, botName, difficulty))

modules/account/src/main/scala/de/nowchess/account/service/ChallengeService.scala

@@ -95,7 +95,7 @@ class ChallengeService:
       challenge.expiresAt = Instant.now().plus(24, ChronoUnit.HOURS)
       challengeRepository.persist(challenge)
       try eventPublisher.publishChallengeCreated(destUser.id.toString, challenge.id.toString, challenger.username)
-      catch case ex: Exception => log.warnf(ex, "Failed to notify dest user for challenge %s", challenge.id)
+      catch case ex: Exception => log.errorf(ex, "Failed to notify dest user for challenge %s", challenge.id)
       challenge
 
   @Transactional
@@ -116,7 +116,7 @@ class ChallengeService:
       challengeRepository.merge(challenge)
       notifyBotIfNeeded(challenge, gameId)
       try eventPublisher.publishChallengeAccepted(challenge.challenger.id.toString, challenge.id.toString, gameId)
-      catch case ex: Exception => log.warnf(ex, "Failed to notify challenger for game %s", gameId)
+      catch case ex: Exception => log.errorf(ex, "Failed to notify challenger for game %s", gameId)
       challenge
 
   @Transactional

modules/coordinator/src/main/scala/de/nowchess/coordinator/service/AutoScaler.scala

@@ -167,7 +167,7 @@ class AutoScaler:
         catch
           case ex: Exception =>
             meterRegistry.counter("nowchess.coordinator.scale.failures", "direction", "up").increment()
-            log.warnf(ex, "Failed to scale up %s", config.k8sRolloutName)
+            log.errorf(ex, "Failed to scale up %s", config.k8sRolloutName)
 
   def scaleDown(): Unit =
     log.info("Scaling down Argo Rollout")
@@ -225,4 +225,4 @@ class AutoScaler:
         catch
           case ex: Exception =>
             meterRegistry.counter("nowchess.coordinator.scale.failures", "direction", "down").increment()
-            log.warnf(ex, "Failed to scale down %s", config.k8sRolloutName)
+            log.errorf(ex, "Failed to scale down %s", config.k8sRolloutName)

modules/coordinator/src/main/scala/de/nowchess/coordinator/service/CacheEvictionManager.scala

@@ -80,14 +80,14 @@ class CacheEvictionManager:
                 count + 1
               catch
                 case ex: Exception =>
-                  log.warnf(ex, "Failed to evict game %s", gameId)
+                  log.errorf(ex, "Failed to evict game %s", gameId)
                   count
             }
           else count
         }
       catch
         case ex: Exception =>
-          log.warnf(ex, "Error processing game key %s", key)
+          log.errorf(ex, "Error processing game key %s", key)
           count
     }
 

modules/coordinator/src/main/scala/de/nowchess/coordinator/service/FailoverService.scala

@@ -112,7 +112,7 @@ class FailoverService:
           else false
         catch
           case ex: Exception =>
-            log.warnf(ex, "Failed to migrate batch to %s, trying next", target.instanceId)
+            log.errorf(ex, "Failed to migrate batch to %s, trying next", target.instanceId)
             false
       if success then true else tryMigrateBatch(batch, batchIdx, instances, deadId, attempt + 1)
 

modules/coordinator/src/main/scala/de/nowchess/coordinator/service/HealthMonitor.scala

@@ -192,7 +192,7 @@ class HealthMonitor:
               log.debugf("No pod found for instance %s, skipping deletion", instanceId)
         catch
           case ex: Exception =>
-            log.warnf(
+            log.errorf(
               ex,
               "Failed to delete pod for instance %s — removing from registry to prevent blocking scale-down",
               instanceId,

modules/coordinator/src/main/scala/de/nowchess/coordinator/service/InstanceRegistry.scala

@@ -99,7 +99,7 @@ class InstanceRegistry:
           }
         catch
           case ex: Exception =>
-            log.warnf(ex, "Failed to parse instance metadata for %s — removing from registry", instanceId)
+            log.errorf(ex, "Failed to parse instance metadata for %s — removing from registry", instanceId)
             instances.remove(instanceId)
             meterRegistry.counter("nowchess.coordinator.instances.removed").increment()
             Uni.createFrom().item(())

modules/coordinator/src/main/scala/de/nowchess/coordinator/service/LoadBalancer.scala

@@ -96,14 +96,14 @@ class LoadBalancer:
                 log.infof("Moved %d games from %s to %s", subscribed, over.instanceId, target.instanceId)
             catch
               case ex: Exception =>
-                log.warnf(ex, "Failed to move games from %s to %s", over.instanceId, target.instanceId)
+                log.errorf(ex, "Failed to move games from %s to %s", over.instanceId, target.instanceId)
           }
 
           val elapsed = System.currentTimeMillis() - startTime
           log.infof("Rebalance completed in %dms", elapsed)
     catch
       case ex: Exception =>
-        log.warnf(ex, "Rebalance failed")
+        log.errorf(ex, "Rebalance failed")
 
   private def getGamesToMove(instanceId: String, count: Int): List[String] =
     try
@@ -125,7 +125,7 @@ class LoadBalancer:
       }
     catch
       case ex: Exception =>
-        log.warnf(ex, "Failed to update Redis game sets")
+        log.errorf(ex, "Failed to update Redis game sets")
 
   @Scheduled(every = "30s")
   def periodicRebalanceCheck(): Unit =

modules/core/src/main/scala/de/nowchess/chess/grpc/IoGrpcClientWrapper.scala

@@ -25,7 +25,7 @@ class IoGrpcClientWrapper:
       CombinedExportResponse(combined.getFen, combined.getPgn)
     catch
       case ex: Exception =>
-        log.warnf(ex, "IO gRPC exportCombined failed")
+        log.errorf(ex, "IO gRPC exportCombined failed")
         // scalafix:off DisableSyntax.throw
         throw ex
       // scalafix:on DisableSyntax.throw
@@ -34,7 +34,7 @@ class IoGrpcClientWrapper:
     try CoreProtoMapper.fromProtoGameContext(stub.importFen(ProtoImportFenRequest.newBuilder().setFen(fen).build()))
     catch
       case ex: Exception =>
-        log.warnf(ex, "IO gRPC importFen failed for fen %s", fen)
+        log.errorf(ex, "IO gRPC importFen failed for fen %s", fen)
         // scalafix:off DisableSyntax.throw
         throw ex
       // scalafix:on DisableSyntax.throw
@@ -43,7 +43,7 @@ class IoGrpcClientWrapper:
     try CoreProtoMapper.fromProtoGameContext(stub.importPgn(ProtoImportPgnRequest.newBuilder().setPgn(pgn).build()))
     catch
       case ex: Exception =>
-        log.warnf(ex, "IO gRPC importPgn failed")
+        log.errorf(ex, "IO gRPC importPgn failed")
         // scalafix:off DisableSyntax.throw
         throw ex
       // scalafix:on DisableSyntax.throw
@@ -52,7 +52,7 @@ class IoGrpcClientWrapper:
     try stub.exportFen(CoreProtoMapper.toProtoGameContext(ctx)).getValue
     catch
       case ex: Exception =>
-        log.warnf(ex, "IO gRPC exportFen failed")
+        log.errorf(ex, "IO gRPC exportFen failed")
         // scalafix:off DisableSyntax.throw
         throw ex
       // scalafix:on DisableSyntax.throw
@@ -61,7 +61,7 @@ class IoGrpcClientWrapper:
     try stub.exportPgn(CoreProtoMapper.toProtoGameContext(ctx)).getValue
     catch
       case ex: Exception =>
-        log.warnf(ex, "IO gRPC exportPgn failed")
+        log.errorf(ex, "IO gRPC exportPgn failed")
         // scalafix:off DisableSyntax.throw
         throw ex
       // scalafix:on DisableSyntax.throw