Wei-Chiu Chuang created HDDS-8194:
-------------------------------------
Summary: OzoneManager.getRatisRoles() throws NPE because the ratis
role is undetermined
Key: HDDS-8194
URL: https://issues.apache.org/jira/browse/HDDS-8194
Project: Apache Ozone
Issue Type: Bug
Reporter: Wei-Chiu Chuang
The OM is undergoing leader election:
{noformat}
2023-03-14 17:28:19,826 INFO org.apache.ratis.server.impl.RoleInfo: om1: start
om1@group-9F198C4C3682-LeaderElection4
2023-03-14 17:28:19,829 INFO org.apache.ratis.server.impl.LeaderElection:
om1@group-9F198C4C3682-LeaderElection4 PRE_VOTE round 0: submit vote requests
at term 16 for
344159:
peers:[om1|rpc:hb2-cf4-2.hb2-cf4.root.hwx.site:9872|admin:|client:|dataStream:|priority:0|startupRole:FOLLOWER,
om3|rpc:hb2-cf4-8.hb2-cf4.root.hwx.site:9872|ad
min:|client:|dataStream:|priority:0|startupRole:FOLLOWER,
om2|rpc:hb2-cf4-6.hb2-cf4.root.hwx.site:9872|admin:|client:|dataStream:|priority:0|startupRole:FOLLOWER]|list
eners:[], old=null
2023-03-14 17:28:19,833 INFO org.apache.ratis.server.impl.LeaderElection:
om1@group-9F198C4C3682-LeaderElection4 got exception when requesting votes:
java.util.concurr
ent.ExecutionException:
org.apache.ratis.thirdparty.io.grpc.StatusRuntimeException: UNAVAILABLE: io
exception
2023-03-14 17:28:19,833 INFO org.apache.ratis.server.impl.LeaderElection:
om1@group-9F198C4C3682-LeaderElection4 got exception when requesting votes:
java.util.concurr
ent.ExecutionException:
org.apache.ratis.thirdparty.io.grpc.StatusRuntimeException: UNAVAILABLE: io
exception
2023-03-14 17:28:19,833 INFO org.apache.ratis.server.impl.LeaderElection:
om1@group-9F198C4C3682-LeaderElection4: PRE_VOTE REJECTED received 0
response(s) and 2 except
ion(s):
2023-03-14 17:28:19,833 INFO org.apache.ratis.server.impl.LeaderElection:
Exception 0: java.util.concurrent.ExecutionException:
org.apache.ratis.thirdparty.io.grpc.S
tatusRuntimeException: UNAVAILABLE: io exception
2023-03-14 17:28:19,833 INFO org.apache.ratis.server.impl.LeaderElection:
Exception 1: java.util.concurrent.ExecutionException:
org.apache.ratis.thirdparty.io.grpc.S
tatusRuntimeException: UNAVAILABLE: io exception
2023-03-14 17:28:19,833 INFO org.apache.ratis.server.impl.LeaderElection:
om1@group-9F198C4C3682-LeaderElection4 PRE_VOTE round 0: result REJECTED
2023-03-14 17:28:19,833 INFO org.apache.ratis.server.RaftServer$Division:
om1@group-9F198C4C3682: changes role from CANDIDATE to FOLLOWER at term 16 for
REJECTED
2023-03-14 17:28:19,833 INFO org.apache.ratis.server.impl.RoleInfo: om1:
shutdown om1@group-9F198C4C3682-LeaderElection4
2023-03-14 17:28:19,834 INFO org.apache.ratis.server.impl.RoleInfo: om1: start
om1@group-9F198C4C3682-FollowerState
{noformat}
{noformat}
2023-03-14 17:28:21,495 ERROR org.apache.hadoop.jmx.JMXJsonServlet: getting
attribute RatisRoles of
Hadoop:service=OzoneManager,name=OzoneManagerInfo,component=ServerR
untime threw an exception
javax.management.RuntimeMBeanException: java.lang.NullPointerException
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrow(DefaultMBeanServerInterceptor.java:839)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrowMaybeMBeanException(DefaultMBeanServerInterceptor.java:852)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:651)
at
com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:678)
at
org.apache.hadoop.jmx.JMXJsonServlet.writeAttribute(JMXJsonServlet.java:338)
at
org.apache.hadoop.jmx.JMXJsonServlet.listBeans(JMXJsonServlet.java:316)
at org.apache.hadoop.jmx.JMXJsonServlet.doGet(JMXJsonServlet.java:210)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
at
org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1626)
at
org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:110)
at
org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at
org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at
org.apache.hadoop.hdds.server.http.HttpServer2$QuotingInputFilter.doFilter(HttpServer2.java:1681)
at
org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
at
org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1601)
at
org.apache.hadoop.hdds.server.http.NoCacheFilter.doFilter(NoCacheFilter.java:48)
...
Caused by: java.lang.NullPointerException
at
org.apache.hadoop.ozone.om.OzoneManager.getRatisRoles(OzoneManager.java:2925)
at sun.reflect.GeneratedMethodAccessor192.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at
com.sun.jmx.mbeanserver.ConvertingMethod.invokeWithOpenReturn(ConvertingMethod.java:193)
at
com.sun.jmx.mbeanserver.ConvertingMethod.invokeWithOpenReturn(ConvertingMethod.java:175)
at
com.sun.jmx.mbeanserver.MXBeanIntrospector.invokeM2(MXBeanIntrospector.java:117)
at
com.sun.jmx.mbeanserver.MXBeanIntrospector.invokeM2(MXBeanIntrospector.java:54)
at
com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:237)
at
com.sun.jmx.mbeanserver.PerInterface.getAttribute(PerInterface.java:83)
at
com.sun.jmx.mbeanserver.MBeanSupport.getAttribute(MBeanSupport.java:206)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:647)
... 53 more {noformat}
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