test: stabilize gb32960 durable ack boundary

modules/protocols/protocol-gb32960/src/test/java/com/lingniu/ingest/protocol/gb32960/inbound/Gb32960ChannelHandlerAckBoundaryTest.java

@@ -61,10 +61,9 @@ class Gb32960ChannelHandlerAckBoundaryTest {
 
             dispatch.awaitPublishCount(1);
             dispatch.failDurability();
-            channel.runPendingTasks();
 
             assertThat((Object) channel.readOutbound()).isNull();
-            assertThat(channel.isActive()).isFalse();
+            assertThat(awaitInactive(channel)).isTrue();
             channel.finishAndReleaseAll();
         }
     }
@@ -151,6 +150,18 @@ class Gb32960ChannelHandlerAckBoundaryTest {
         return null;
     }
 
+    private static boolean awaitInactive(EmbeddedChannel channel) {
+        long deadline = System.currentTimeMillis() + 3000;
+        while (System.currentTimeMillis() < deadline) {
+            channel.runPendingTasks();
+            if (!channel.isActive()) {
+                return true;
+            }
+            Thread.onSpinWait();
+        }
+        return false;
+    }
+
     private static final class DispatchHarness implements AutoCloseable {
         private final ControlledSink sink = new ControlledSink();
         private final DisruptorEventBus eventBus = new DisruptorEventBus(1024, "blocking", List.of(sink));