Fixed NPE in dumping network interface information (https://issues.re…

…dhat.com/browse/JGRP-2527)
belaban · Feb 2, 2021 · a7300d3 · a7300d3
1 parent 29e439f
commit a7300d3
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/src/org/jgroups/protocols/UDP.java b/src/org/jgroups/protocols/UDP.java
@@ -586,10 +586,12 @@ protected String dumpSocketInfo() throws Exception {
             formatter.format("\nmcast_sock: bound to %s:%d, send buffer size=%d, receive buffer size=%d",
                              mcast_sock.getLocalAddress(), mcast_sock.getLocalPort(),
                              mcast_sock.getSendBufferSize(), mcast_sock.getReceiveBufferSize());
+        NetworkInterface nic=bind_addr != null? NetworkInterface.getByInetAddress(bind_addr) : null;
+        String nic_name=nic != null? nic.getName() : "n/a";
         if(bind_port > 0)
-            formatter.format("\n%s: using the network interface '%s' with port range '%s-%s'", bind_addr, NetworkInterface.getByInetAddress(bind_addr).getName(), bind_port, (bind_port + port_range));
+            formatter.format("\n%s: using network interface '%s' with port range '%s-%s'", bind_addr, nic_name, bind_port, (bind_port + port_range));
         else
-            formatter.format("\n%s: using the network interface '%s' to any (ephemeral) port", bind_addr, NetworkInterface.getByInetAddress(bind_addr).getName());
+            formatter.format("\n%s: using network interface '%s' to any (ephemeral) port", bind_addr, nic_name);
         return sb.toString();
     }