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https://issues.apache.org/jira/browse/HDFS-17559?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Haiyang Hu updated HDFS-17559:
------------------------------
Description:
If there is datanode info in includes, but the datanode service is not
currently started, the uuid of the datanode will be null.
when get the DeadNodes DeadNodes metric, the following exception will occur:
{code:java}
2024-06-26 17:06:49,698 ERROR jmx.JMXJsonServlet
(JMXJsonServlet.java:writeAttribute(345)) [qtp1107412069-7704] - getting
attribute DeadNodes of Hadoop:service=NameNode,name=NameNodeInfo threw an
exception javax.management.RuntimeMBeanException:
java.lang.NullPointerException: null value in entry: uuid=null
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrow(DefaultMBeanServerInterceptor.java:839)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrowMaybeMBeanException(DefaultMBeanServerInterceptor.java:852)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:651)
at
com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:678)
at
org.apache.hadoop.jmx.JMXJsonServlet.writeAttribute(JMXJsonServlet.java:338)
{code}
was:
If there is datanode info in includes, but the datanode service is not
currently started, the uuid of the datanode will be null. When getting the
DeadNodes DeadNodes metric, the following exception will occur:
{code:java}
2024-06-26 17:06:49,698 ERROR jmx.JMXJsonServlet
(JMXJsonServlet.java:writeAttribute(345)) [qtp1107412069-7704] - getting
attribute DeadNodes of Hadoop:service=NameNode,name=NameNodeInfo threw an
exception javax.management.RuntimeMBeanException:
java.lang.NullPointerException: null value in entry: uuid=null
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrow(DefaultMBeanServerInterceptor.java:839)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrowMaybeMBeanException(DefaultMBeanServerInterceptor.java:852)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:651)
at
com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:678)
at
org.apache.hadoop.jmx.JMXJsonServlet.writeAttribute(JMXJsonServlet.java:338)
{code}
> Fix the uuid as null in NameNodeMXBean
> --------------------------------------
>
> Key: HDFS-17559
> URL: https://issues.apache.org/jira/browse/HDFS-17559
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Haiyang Hu
> Assignee: Haiyang Hu
> Priority: Major
>
> If there is datanode info in includes, but the datanode service is not
> currently started, the uuid of the datanode will be null.
> when get the DeadNodes DeadNodes metric, the following exception will occur:
> {code:java}
> 2024-06-26 17:06:49,698 ERROR jmx.JMXJsonServlet
> (JMXJsonServlet.java:writeAttribute(345)) [qtp1107412069-7704] - getting
> attribute DeadNodes of Hadoop:service=NameNode,name=NameNodeInfo threw an
> exception javax.management.RuntimeMBeanException:
> java.lang.NullPointerException: null value in entry: uuid=null
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrow(DefaultMBeanServerInterceptor.java:839)
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrowMaybeMBeanException(DefaultMBeanServerInterceptor.java:852)
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:651)
> at
> com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:678)
> at
> org.apache.hadoop.jmx.JMXJsonServlet.writeAttribute(JMXJsonServlet.java:338)
> {code}
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