Avoid npe in netty 4.1 instrumentation (#5902)

open-telemetry · Apr 21, 2022 · ceeaa1b · ceeaa1b
1 parent d949a82
commit ceeaa1b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/.../opentelemetry/javaagent/instrumentation/netty/v4_1/InstrumentedAddressResolverGroup.java b/.../opentelemetry/javaagent/instrumentation/netty/v4_1/InstrumentedAddressResolverGroup.java
@@ -22,7 +22,7 @@ public final class InstrumentedAddressResolverGroup<T extends SocketAddress>
 
   public static <T extends SocketAddress> AddressResolverGroup<T> wrap(
       NettyConnectionInstrumenter instrumenter, AddressResolverGroup<T> delegate) {
-    if (delegate instanceof InstrumentedAddressResolverGroup) {
+    if (delegate == null || delegate instanceof InstrumentedAddressResolverGroup) {
       return delegate;
     }
     return new InstrumentedAddressResolverGroup<>(instrumenter, delegate);