From 5650013fc4aef300afef53db1b76b264e428e964 Mon Sep 17 00:00:00 2001
From: Harald Musum <musum@verizonmedia.com>
Date: Wed, 10 Nov 2021 17:10:41 +0100
Subject: Revert "Always update config when generation has changed
 [run-systemtest]"

---
 .../config/subscription/impl/ConfigSubscription.java     | 16 +---------------
 .../config/subscription/impl/JRTConfigSubscription.java  | 14 +-------------
 2 files changed, 2 insertions(+), 28 deletions(-)

(limited to 'config')

diff --git a/config/src/main/java/com/yahoo/config/subscription/impl/ConfigSubscription.java b/config/src/main/java/com/yahoo/config/subscription/impl/ConfigSubscription.java
index a3265671d50..6a81c2279d1 100644
--- a/config/src/main/java/com/yahoo/config/subscription/impl/ConfigSubscription.java
+++ b/config/src/main/java/com/yahoo/config/subscription/impl/ConfigSubscription.java
@@ -16,9 +16,7 @@ import com.yahoo.vespa.config.TimingValues;
 import com.yahoo.vespa.config.protocol.DefContent;
 
 import java.io.File;
-import java.util.Objects;
 import java.util.concurrent.atomic.AtomicReference;
-import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import static com.yahoo.vespa.config.PayloadChecksum.Type.MD5;
@@ -205,18 +203,6 @@ public abstract class ConfigSubscription<T extends ConfigInstance> {
         this.config.set(new ConfigState<>(true, generation, applyOnRestart, true, config, payloadChecksums));
     }
 
-    void setConfigAndGeneration(Long generation, boolean applyOnRestart, T config, PayloadChecksums payloadChecksums) {
-        ConfigState<T> prev = this.config.get();
-        boolean configChanged = !Objects.equals(prev.getConfig(), config);
-        String message = "Config has changed unexpectedly for " + key + ", generation " + generation;
-        if (configChanged) {
-            if (log.isLoggable(Level.FINE))
-                message = message + ", config in state :" + prev.getConfig() + ", new config: " + config;
-            log.log(Level.WARNING, message);
-        }
-        this.config.set(new ConfigState<>(true, generation, applyOnRestart, configChanged, config, payloadChecksums));
-    }
-
     /**
      * Used by {@link FileConfigSubscription} and {@link ConfigSetSubscription}
      */
@@ -227,7 +213,7 @@ public abstract class ConfigSubscription<T extends ConfigInstance> {
 
     protected void setConfigIfChanged(T config) {
         ConfigState<T> prev = this.config.get();
-        this.config.set(new ConfigState<>(true, prev.getGeneration(), prev.applyOnRestart(), !Objects.equals(prev.getConfig(), config), config, prev.payloadChecksums));
+        this.config.set(new ConfigState<>(true, prev.getGeneration(), prev.applyOnRestart(), !config.equals(prev.getConfig()), config, prev.payloadChecksums));
     }
 
     void setGeneration(Long generation) {
diff --git a/config/src/main/java/com/yahoo/config/subscription/impl/JRTConfigSubscription.java b/config/src/main/java/com/yahoo/config/subscription/impl/JRTConfigSubscription.java
index c6ea79ddbcd..27099790f5b 100644
--- a/config/src/main/java/com/yahoo/config/subscription/impl/JRTConfigSubscription.java
+++ b/config/src/main/java/com/yahoo/config/subscription/impl/JRTConfigSubscription.java
@@ -73,7 +73,7 @@ public class JRTConfigSubscription<T extends ConfigInstance> extends ConfigSubsc
             if (jrtReq.hasUpdatedConfig()) {
                 setNewConfig(jrtReq);
             } else {
-                setNewConfigAndGeneration(jrtReq);
+                setGeneration(jrtReq.getNewGeneration());
             }
         }
 
@@ -110,18 +110,6 @@ public class JRTConfigSubscription<T extends ConfigInstance> extends ConfigSubsc
         }
     }
 
-    protected void setNewConfigAndGeneration(JRTClientConfigRequest jrtReq) {
-        try {
-            T configInstance = toConfigInstance(jrtReq);
-            setConfigAndGeneration(jrtReq.getNewGeneration(),
-                                   jrtReq.responseIsApplyOnRestart(),
-                                   configInstance,
-                                   jrtReq.getNewChecksums());
-        } catch (IllegalArgumentException e) {
-            throw new IllegalArgumentException("Bad config in response", e);
-        }
-    }
-
     /**
      * This method should ideally throw new MissingConfig/Configuration exceptions and let the caller
      * catch them. However, this would make the code in JRT/File/RawSource uglier.
-- 
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