From 68413574aab1fb4115b906d9a531fa5ac2cd7405 Mon Sep 17 00:00:00 2001
From: Norman Maurer <norman_maurer@apple.com>
Date: Fri, 25 Oct 2019 11:14:06 -0700
Subject: [PATCH] Guard against busy spinning in HashedWheelTimer when using
 windows and a tickDuration of 1 (#9714)

Motivation:

We do not correct guard against the gact that when applying our workaround for windows we may end up with a 0 sleep period. In this case we should just sleep for 1 ms.

Modifications:

Guard agains the case when our calculation will produce 0 as sleep time on windows

Result:

Fixes https://github.com/netty/netty/issues/9710.
---
 common/src/main/java/io/netty/util/HashedWheelTimer.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/src/main/java/io/netty/util/HashedWheelTimer.java b/common/src/main/java/io/netty/util/HashedWheelTimer.java
index 4b2f5459d4..395253be42 100644
--- a/common/src/main/java/io/netty/util/HashedWheelTimer.java
+++ b/common/src/main/java/io/netty/util/HashedWheelTimer.java
@@ -563,6 +563,9 @@ public class HashedWheelTimer implements Timer {
                 // See https://github.com/netty/netty/issues/356
                 if (PlatformDependent.isWindows()) {
                     sleepTimeMs = sleepTimeMs / 10 * 10;
+                    if (sleepTimeMs == 0) {
+                        sleepTimeMs = 1;
+                    }
                 }
 
                 try {