diff --git a/modules/benchmarks/src/main/java/org/apache/ignite/internal/benchmarks/jmh/thin/JmhThinClientCacheBenchmark.java b/modules/benchmarks/src/main/java/org/apache/ignite/internal/benchmarks/jmh/thin/JmhThinClientCacheBenchmark.java
index 3beeb24..d036b15 100644
--- a/modules/benchmarks/src/main/java/org/apache/ignite/internal/benchmarks/jmh/thin/JmhThinClientCacheBenchmark.java
+++ b/modules/benchmarks/src/main/java/org/apache/ignite/internal/benchmarks/jmh/thin/JmhThinClientCacheBenchmark.java
@@ -37,6 +37,7 @@
      */
     public static void main(String[] args) throws Exception {
         // TODO: Benchmark hangs when GridNioServer.selectorCount > 1
+        // See GridNioClientConnectionMultiplexer constructor
         System.setProperty(IgniteSystemProperties.IGNITE_IO_BALANCE_PERIOD, "0");
 
         JmhThinClientCacheBenchmark b = new JmhThinClientCacheBenchmark();