rawlinp commented on a change in pull request #4409: Optimize TR DNSSEC zone 
re-signing
URL: https://github.com/apache/trafficcontrol/pull/4409#discussion_r382156731
 
 

 ##########
 File path: 
traffic_router/core/src/main/java/com/comcast/cdn/traffic_control/traffic_router/core/dns/ZoneManager.java
 ##########
 @@ -460,18 +499,37 @@ private static void generateZones(final TrafficRouter 
tr, final LoadingCache<Zon
                        LOGGER.fatal("Unable to create zone: " + 
ex.getMessage(), ex);
                }
 
-               primeZoneCache(domain, name, list, tr, zc, dzc, 
generationTasks, primingTasks, ds);
+               primeZoneCache(domain, name, list, tr, zc, dzc, 
generationTasks, primingTasks, ds, newDomainsToZoneKeys);
 
                return records;
        }
 
-       @SuppressWarnings("PMD.CyclomaticComplexity")
+       @SuppressWarnings({"PMD.CyclomaticComplexity", 
"PMD.ExcessiveParameterList"})
        private static void primeZoneCache(final String domain, final Name 
name, final List<Record> list, final TrafficRouter tr,
                        final LoadingCache<ZoneKey, Zone> zc, final 
LoadingCache<ZoneKey, Zone> dzc, final List<Runnable> generationTasks,
-                       final BlockingQueue<Runnable> primingTasks, final 
DeliveryService ds) {
+                       final BlockingQueue<Runnable> primingTasks, final 
DeliveryService ds, final ConcurrentMap<String, ZoneKey> newDomainsToZoneKeys) {
                generationTasks.add(() -> {
                        try {
-                               final Zone zone = 
zc.get(signatureManager.generateZoneKey(name, list)); // cause the zone to be 
loaded into the new cache
+                               final ZoneKey newZoneKey = 
signatureManager.generateZoneKey(name, list);
+                               if (tr.isDnssecZoneDiffingEnabled() && 
domainsToZoneKeys.containsKey(domain)) {
 
 Review comment:
   Sure, I can try that out.

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