log: TimerMap keys when cardinality >10k

Author: Sunjeet

evcache-core/src/main/java/net/spy/memcached/EVCacheMemcachedClient.java

@@ -78,6 +78,7 @@ public class EVCacheMemcachedClient extends MemcachedClient {
     private final EVCacheClient client;
     private final Map<String, Timer> timerMap = new ConcurrentHashMap<String, Timer>();
     private final Map<String, DistributionSummary> distributionSummaryMap = new ConcurrentHashMap<String, DistributionSummary>();
+    private volatile boolean timerMapKeysLogged = false;
 
     private Property<Long> mutateOperationTimeout;
     private final ConnectionFactory connectionFactory;
@@ -603,6 +604,21 @@ private Timer getTimer(String operation, String operationType, OperationStatus s
 
         timer = EVCacheMetricsFactory.getInstance().getPercentileTimer(EVCacheMetricsFactory.IPC_CALL, tagList, Duration.ofMillis(maxDuration));
         timerMap.put(name, timer);
+
+        // Log timer map keys once if size exceeds threshold
+        int mapSize = timerMap.size();
+        if (mapSize > 10000 && !timerMapKeysLogged) {
+            synchronized (this) {
+                if (!timerMapKeysLogged) {
+                    timerMapKeysLogged = true;
+                    log.error("TimerMap size exceeded 10,000 entries. Current size: {}. Keys in map:", mapSize);
+                    for (String key : timerMap.keySet()) {
+                        log.error("  TimerMap key: {}", key);
+                    }
+                }
+            }
+        }
+
         return timer;
     }