From 19ee1859071509bba9ecd0a8a7dc6a47e2979c88 Mon Sep 17 00:00:00 2001 From: Rohith Sharma K S Date: Sat, 5 Mar 2016 12:38:15 +0530 Subject: [PATCH] YARN-4763. RMApps Page crashes with NPE. (Bibin A Chundatt via rohithsharmaks) --- .../yarn/server/resourcemanager/webapp/RMAppsBlock.java | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMAppsBlock.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMAppsBlock.java index 24a40c1d130..b4d792143a6 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMAppsBlock.java +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMAppsBlock.java @@ -31,6 +31,7 @@ import org.apache.hadoop.yarn.api.records.ApplicationReport; import org.apache.hadoop.yarn.api.records.YarnApplicationState; import org.apache.hadoop.yarn.server.resourcemanager.ResourceManager; +import org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt; import org.apache.hadoop.yarn.server.webapp.AppsBlock; import org.apache.hadoop.yarn.server.webapp.dao.AppInfo; import org.apache.hadoop.yarn.util.ConverterUtils; @@ -95,9 +96,11 @@ protected void renderData(Block html) { } String blacklistedNodesCount = "N/A"; - Set nodes = rm.getRMContext().getRMApps() - .get(appAttemptId.getApplicationId()).getAppAttempts() - .get(appAttemptId).getBlacklistedNodes(); + RMAppAttempt appAttempt = + rm.getRMContext().getRMApps().get(appAttemptId.getApplicationId()) + .getAppAttempts().get(appAttemptId); + Set nodes = + null == appAttempt ? null : appAttempt.getBlacklistedNodes(); if (nodes != null) { blacklistedNodesCount = String.valueOf(nodes.size()); }