From 9ec8c4477cda3f00e49e075aab13e0b81db4b044 Mon Sep 17 00:00:00 2001
From: Pedro Ruivo <pruivo@redhat.com>
Date: Mon, 3 Oct 2022 17:45:31 +0100
Subject: [PATCH] ISPN-14190 NullPointerException when computing Netty global
 connections

* Part 2
---
 .../core/transport/NettyTransportConnectionStats.java  | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/server/core/src/main/java/org/infinispan/server/core/transport/NettyTransportConnectionStats.java b/server/core/src/main/java/org/infinispan/server/core/transport/NettyTransportConnectionStats.java
index d434d43f1a08..15b27c45678c 100644
--- a/server/core/src/main/java/org/infinispan/server/core/transport/NettyTransportConnectionStats.java
+++ b/server/core/src/main/java/org/infinispan/server/core/transport/NettyTransportConnectionStats.java
@@ -89,7 +89,15 @@ static class ConnectionAdderTask implements Function<EmbeddedCacheManager, Integ
 
       @Override
       public Integer apply(EmbeddedCacheManager embeddedCacheManager) {
-         return SecurityActions.getGlobalComponentRegistry(embeddedCacheManager).getComponent(ProtocolServer.class, serverName).getTransport().getNumberOfLocalConnections();
+         ProtocolServer<?> protocolServer = SecurityActions.getGlobalComponentRegistry(embeddedCacheManager)
+               .getComponent(ProtocolServer.class, serverName);
+         // protocol server not registered; so no connections are open.
+         if (protocolServer == null) {
+            return 0;
+         }
+         Transport transport = protocolServer.getTransport();
+         // check if the transport is up; otherwise no connections are open
+         return transport == null ? 0 : transport.getNumberOfLocalConnections();
       }
 
       public static class Externalizer implements org.infinispan.commons.marshall.Externalizer<ConnectionAdderTask> {