diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/security/DelegationTokenRenewer.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/security/DelegationTokenRenewer.java index b4da08f52fe..d8368eb6482 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/security/DelegationTokenRenewer.java +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/security/DelegationTokenRenewer.java @@ -89,6 +89,8 @@ new Text("HDFS_DELEGATION_TOKEN"); public static final String SCHEME = "hdfs"; + private volatile int lastEventQueueSizeLogged = 0; + // global single timer (daemon) private Timer renewalTimer; private RMContext rmContext; @@ -228,6 +230,13 @@ private void processDelegationTokenRenewerEvent( futures.put(evt, future); } else { pendingEventQueue.add(evt); + int qSize = pendingEventQueue.size(); + if (qSize != 0 && qSize % 1000 == 0 + && lastEventQueueSizeLogged != qSize) { + lastEventQueueSizeLogged = qSize; + LOG.info("Size of pending " + + "DelegationTokenRenewerEvent queue is " + qSize); + } } } finally { serviceStateLock.readLock().unlock();