ololo3000 commented on a change in pull request #7647: IGNITE-12879 Refactors 
test configuration of discovery messages interceptors.
URL: https://github.com/apache/ignite/pull/7647#discussion_r409426799
 
 

 ##########
 File path: 
modules/core/src/test/java/org/apache/ignite/spi/discovery/tcp/TestTcpDiscoverySpi.java
 ##########
 @@ -44,4 +54,24 @@
     @Override public void simulateNodeFailure() {
         super.simulateNodeFailure();
     }
+
+    /** {@inheritDoc} */
+    @SuppressWarnings("ZeroLengthArrayAllocation")
+    @Override public void setListener(@Nullable DiscoverySpiListener lsnr) {
+        super.setListener(lsnr ==  null || discoHooks.isEmpty() ?
 
 Review comment:
   > It seems to me that we can just pass discoHooks into the listener.
   > Therefore list always be up to date inside the listener.
   
   It's not clear for me in what cases hooks are needed to be modified after 
SPI start. I think that the current approach is more robust. 

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