[jira] [Created] (RATIS-577) NPE in LogAppender while creating a new request.

["Mukul Kumar Singh (JIRA)" <ji...@apache.org>]

Mukul Kumar Singh created RATIS-577:
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             Summary: NPE in LogAppender while creating a new request.
                 Key: RATIS-577
                 URL: https://issues.apache.org/jira/browse/RATIS-577
             Project: Ratis
          Issue Type: Bug
          Components: server
    Affects Versions: 0.3.0
            Reporter: Mukul Kumar Singh


Found the following NPE in the LogAppender while creating a new request.

{code}
2019-05-30 08:10:44,275 ERROR impl.LogAppender (LogAppender.java:run(90)) - org.apache.ratis.server.impl.LogAppender$AppenderDaemon@5e4b44cc unexpected exception
java.lang.NullPointerException
        at java.util.Objects.requireNonNull(Objects.java:203)
        at java.util.Optional.<init>(Optional.java:96)
        at java.util.Optional.of(Optional.java:108)
        at org.apache.ratis.server.impl.ServerProtoUtils.getStateMachineEntry(ServerProtoUtils.java:197)
        at org.apache.ratis.server.impl.ServerProtoUtils.getStateMachineData(ServerProtoUtils.java:205)
        at org.apache.ratis.server.impl.ServerProtoUtils.shouldReadStateMachineData(ServerProtoUtils.java:210)
        at org.apache.ratis.server.raftlog.segmented.SegmentedRaftLog.getEntryWithData(SegmentedRaftLog.java:206)
        at org.apache.ratis.server.impl.LogAppender.createRequest(LogAppender.java:209)
        at org.apache.ratis.grpc.server.GrpcLogAppender.appendLog(GrpcLogAppender.java:169)
        at org.apache.ratis.grpc.server.GrpcLogAppender.runAppenderImpl(GrpcLogAppender.java:113)
        at org.apache.ratis.server.impl.LogAppender$AppenderDaemon.run(LogAppender.java:80)
        at java.lang.Thread.run(Thread.java:748)
{code}



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