[HIVE-15471] LLAP UI: NPE when getting thread metrics

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.3.0
• Component/s: llap
• Hadoop Flags: Reviewed
• Assignee: Rajesh Balamohan
• Reporter: Rajesh Balamohan
• Created: 20/Dec/16 04:46
• Updated: 21/Jul/17 18:26
• Resolved: 22/Dec/16 04:47

Description

When tasks are interrupted/killed in the middle of the job in LLAP, LlapDaemonExecutorMetrics.updateThreadMetrics could end up throwing NPE.

java.lang.NullPointerException
	at org.apache.hadoop.hive.llap.metrics.LlapDaemonExecutorMetrics.updateThreadMetrics(LlapDaemonExecutorMetrics.java:307) ~[hive-llap-server-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
	at org.apache.hadoop.hive.llap.metrics.LlapDaemonExecutorMetrics.getExecutorStats(LlapDaemonExecutorMetrics.java:269) ~[hive-llap-server-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
	at org.apache.hadoop.hive.llap.metrics.LlapDaemonExecutorMetrics.getMetrics(LlapDaemonExecutorMetrics.java:187) ~[hive-llap-server-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
	at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMetrics(MetricsSourceAdapter.java:194) ~[hadoop-common-2.7.1.jar:?]
	at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.updateJmxCache(MetricsSourceAdapter.java:172) ~[hadoop-common-2.7.1.jar:?]
	at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMBeanInfo(MetricsSourceAdapter.java:151) ~[hadoop-common-2.7.1.jar:?]
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getMBeanInfo(DefaultMBeanServerInterceptor.java:1378) ~[?:1.8.0_77]
	at com.sun.jmx.mbeanserver.JmxMBeanServer.getMBeanInfo(JmxMBeanServer.java:920) ~[?:1.8.0_77]
	at org.apache.hive.http.JMXJsonServlet.listBeans(JMXJsonServlet.java:228) ~[hive-exec-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
	at org.apache.hive.http.JMXJsonServlet.doGet(JMXJsonServlet.java:194) ~[hive-exec-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]