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https://issues.apache.org/jira/browse/RATIS-1624?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Lei Qian updated RATIS-1624:
----------------------------
    Description: 
 

java.lang.NullPointerException: n1: Server n3 not found: peers=[n0, n1, n2]
    at java.base/java.util.Objects.requireNonNull(Objects.java:334)
    at org.apache.ratis.util.PeerProxyMap.getProxy(PeerProxyMap.java:111)
    at 
org.apache.ratis.grpc.server.GrpcLogAppender.getClient(GrpcLogAppender.java:97)
    at 
org.apache.ratis.grpc.server.GrpcLogAppender.appendLog(GrpcLogAppender.java:215)
    at 
org.apache.ratis.grpc.server.GrpcLogAppender.run(GrpcLogAppender.java:149)
    at 
org.apache.ratis.server.leader.LogAppenderDaemon.run(LogAppenderDaemon.java:77)
    at java.base/java.lang.Thread.run(Thread.java:833)

  was:
{quote}java.lang.NullPointerException: n1: Server n3 not found: peers=[n0, n1, 
n2]
    at java.base/java.util.Objects.requireNonNull(Objects.java:334)
    at org.apache.ratis.util.PeerProxyMap.getProxy(PeerProxyMap.java:111)
    at 
org.apache.ratis.grpc.server.GrpcLogAppender.getClient(GrpcLogAppender.java:97)
    at 
org.apache.ratis.grpc.server.GrpcLogAppender.appendLog(GrpcLogAppender.java:215)
    at 
org.apache.ratis.grpc.server.GrpcLogAppender.run(GrpcLogAppender.java:149)
    at 
org.apache.ratis.server.leader.LogAppenderDaemon.run(LogAppenderDaemon.java:77)
    at java.base/java.lang.Thread.run(Thread.java:833)
{quote}


> Can't use set configuration to add a new Listener correctly
> -----------------------------------------------------------
>
>                 Key: RATIS-1624
>                 URL: https://issues.apache.org/jira/browse/RATIS-1624
>             Project: Ratis
>          Issue Type: Sub-task
>            Reporter: Lei Qian
>            Assignee: Lei Qian
>            Priority: Major
>
>  
> java.lang.NullPointerException: n1: Server n3 not found: peers=[n0, n1, n2]
>     at java.base/java.util.Objects.requireNonNull(Objects.java:334)
>     at org.apache.ratis.util.PeerProxyMap.getProxy(PeerProxyMap.java:111)
>     at 
> org.apache.ratis.grpc.server.GrpcLogAppender.getClient(GrpcLogAppender.java:97)
>     at 
> org.apache.ratis.grpc.server.GrpcLogAppender.appendLog(GrpcLogAppender.java:215)
>     at 
> org.apache.ratis.grpc.server.GrpcLogAppender.run(GrpcLogAppender.java:149)
>     at 
> org.apache.ratis.server.leader.LogAppenderDaemon.run(LogAppenderDaemon.java:77)
>     at java.base/java.lang.Thread.run(Thread.java:833)



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