test fix

Author: Vladsz83

modules/core/src/main/java/org/apache/ignite/internal/CoreMessagesProvider.java

@@ -288,6 +288,9 @@ public class CoreMessagesProvider implements MessageFactoryProvider {
     /** Handshake wait message type. */
     public static final short HANDSHAKE_WAIT_MSG_TYPE = HANDSHAKE_MSG_TYPE + 1;
 
+    /** */
+    public static final short MAX_MESSAGE_ID = 15_000;
+
     /** Binary marshaller. */
     private final Marshaller schemaAwareMarhaller;
 
@@ -638,6 +641,8 @@ public CoreMessagesProvider(Marshaller schemaAwareMarhaller, Marshaller schemaLe
         register(IgniteDiagnosticRequest.class);
         register(IgniteDiagnosticResponse.class);
         register(WalStateAckMessage.class);
+
+        assert msgIdx <= MAX_MESSAGE_ID;
     }
 
     /** */

modules/core/src/test/java/org/apache/ignite/spi/MessagesPluginProvider.java

@@ -19,6 +19,7 @@
 
 import java.util.function.Supplier;
 import org.apache.ignite.IgniteCheckedException;
+import org.apache.ignite.internal.CoreMessagesProvider;
 import org.apache.ignite.internal.util.typedef.internal.U;
 import org.apache.ignite.plugin.AbstractTestPluginProvider;
 import org.apache.ignite.plugin.ExtensionRegistry;
@@ -39,7 +40,7 @@ public class MessagesPluginProvider extends AbstractTestPluginProvider {
     @SafeVarargs
     public MessagesPluginProvider(Class<? extends Message>... msgs) {
         msgFactoryProvider = f -> {
-            short directType = 10_000;
+            short directType = CoreMessagesProvider.MAX_MESSAGE_ID + 1;
 
             for (Class<? extends Message> msg : msgs) {
                 Supplier<Message> msgSupp = () -> {