Duo Zhang created HBASE-27824:
---------------------------------
Summary: NPE in MetricsMasterWrapperImpl.isRunning
Key: HBASE-27824
URL: https://issues.apache.org/jira/browse/HBASE-27824
Project: HBase
Issue Type: Bug
Reporter: Duo Zhang
{quote}
2023-05-03T05:54:09,312 ERROR [HBase-Metrics2-1 {}]
impl.MetricsSourceAdapter(202): Error getting metrics from source
Master,sub=Server
java.lang.NullPointerException: null
at
org.apache.hadoop.hbase.master.MetricsMasterWrapperImpl.isRunning(MetricsMasterWrapperImpl.java:143)
~[classes/:?]
at
org.apache.hadoop.hbase.master.MetricsMasterSourceImpl.getMetrics(MetricsMasterSourceImpl.java:92)
~[hbase-hadoop-compat-3.0.0-alpha-4-SNAPSHOT.jar:?]
at
org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMetrics(MetricsSourceAdapter.java:200)
~[hadoop-common-3.2.4.jar:?]
at
org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.updateJmxCache(MetricsSourceAdapter.java:183)
~[hadoop-common-3.2.4.jar:?]
at
org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.getMBeanInfo(MetricsSourceAdapter.java:156)
~[hadoop-common-3.2.4.jar:?]
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getNewMBeanClassName(DefaultMBeanServerInterceptor.java:333)
~[?:1.8.0_362]
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:319)
~[?:1.8.0_362]
at
com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)
~[?:1.8.0_362]
at org.apache.hadoop.metrics2.util.MBeans.register(MBeans.java:98)
~[hadoop-common-3.2.4.jar:?]
at org.apache.hadoop.metrics2.util.MBeans.register(MBeans.java:72)
~[hadoop-common-3.2.4.jar:?]
at
org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.startMBeans(MetricsSourceAdapter.java:222)
~[hadoop-common-3.2.4.jar:?]
at
org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.start(MetricsSourceAdapter.java:101)
~[hadoop-common-3.2.4.jar:?]
at
org.apache.hadoop.metrics2.impl.MetricsSystemImpl.registerSource(MetricsSystemImpl.java:268)
~[hadoop-common-3.2.4.jar:?]
at
org.apache.hadoop.metrics2.impl.MetricsSystemImpl$1.postStart(MetricsSystemImpl.java:239)
~[hadoop-common-3.2.4.jar:?]
at sun.reflect.GeneratedMethodAccessor54.invoke(Unknown Source) ~[?:?]
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
~[?:1.8.0_362]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_362]
at
org.apache.hadoop.metrics2.impl.MetricsSystemImpl$3.invoke(MetricsSystemImpl.java:324)
~[hadoop-common-3.2.4.jar:?]
at com.sun.proxy.$Proxy31.postStart(Unknown Source) ~[?:?]
at
org.apache.hadoop.metrics2.impl.MetricsSystemImpl.start(MetricsSystemImpl.java:193)
~[hadoop-common-3.2.4.jar:?]
at
org.apache.hadoop.metrics2.impl.JmxCacheBuster$JmxCacheBusterRunnable.run(JmxCacheBuster.java:102)
~[hbase-hadoop-compat-3.0.0-alpha-4-SNAPSHOT.jar:?]
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
~[?:1.8.0_362]
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
~[?:1.8.0_362]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
~[?:1.8.0_362]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
~[?:1.8.0_362]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
~[?:1.8.0_362]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
~[?:1.8.0_362]
at java.lang.Thread.run(Thread.java:750) ~[?:1.8.0_362]
{quote}
Found this in the output when running
TestAssignmentManager.testAssignSocketTimeout. It should not be related to the
failure of the test but anyway, throwing NPE is not good so we need to check
whether this is a test issue or a real issue in our code.
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