Исправлена обработка chunk transfer encoding для случаев, когда конец сообщения в отдельном пакете

src/main/java/ru/serega6531/packmate/service/SubscriptionService.java

@@ -12,16 +12,15 @@ import org.springframework.web.socket.sockjs.SockJsTransportFailureException;
 import ru.serega6531.packmate.model.pojo.SubscriptionMessage;
 
 import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 @Service
 @Slf4j
 public class SubscriptionService {
 
-    private final List<WebSocketSession> subscribers = Collections.synchronizedList(new ArrayList<>());
+    private final List<WebSocketSession> subscribers = new CopyOnWriteArrayList<>();
 
     private final ObjectMapper mapper;
 

src/main/java/ru/serega6531/packmate/service/optimization/HttpChunksProcessor.java

@@ -58,7 +58,8 @@ public class HttpChunksProcessor {
     }
 
     private void checkCompleteChunk(List<Packet> packets, int start) {
-        boolean end = BytesUtils.endsWith(packets.get(packets.size() - 1).getContent(), "\r\n0\r\n\r\n".getBytes());
+        boolean end = Arrays.equals(packets.get(packets.size() - 1).getContent(), "0\r\n\r\n".getBytes()) ||
+                BytesUtils.endsWith(packets.get(packets.size() - 1).getContent(), "\r\n0\r\n\r\n".getBytes());
 
         if (end) {
             processChunk(packets, start);