title: Protobuf error:Protocol message tag had invalid wire type
body: <p>I am having the following error when trying to read the message in java</p>
  
  <pre><code>Exception in thread "main" com.google.protobuf.InvalidProtocolBufferException: Protocol message tag had invalid wire type.
      at com.google.protobuf.InvalidProtocolBufferException.invalidWireType(InvalidProtocolBufferException.java:78)
      at com.google.protobuf.UnknownFieldSet$Builder.mergeFieldFrom(UnknownFieldSet.java:498)
      at com.google.protobuf.GeneratedMessage$Builder.parseUnknownField(GeneratedMessage.java:438)
  
  FileInputStream fis = new FileInputStream("F:/Newfolder/sample_message.txt");
  Nt nlc = Nt.parseFrom(fis);
  
  if(nlc.hasMessageId())
  {
      System.out.println("MessageId: "+nta2sse.getMessageId());
  }
  </code></pre>
  
  <p>I am getting exception at <code>if(nlc.hasMessageId())</code></p>
  
  <hr>
  
  <p>Here is full stack trace.</p>
  
  <pre><code>Exception in thread "main" com.google.protobuf.InvalidProtocolBufferException: Protocol message tag had invalid wire type.
      at com.google.protobuf.InvalidProtocolBufferException.invalidWireType(InvalidProtocolBufferException.java:78)
      at com.google.protobuf.UnknownFieldSet$Builder.mergeFieldFrom(UnknownFieldSet.java:498)
      at com.google.protobuf.GeneratedMessage$Builder.parseUnknownField(GeneratedMessage.java:438)
      at com.soeasy.aanta.nta.sse.NtaSse$Nta2Sse$Builder.mergeFrom(NtaSse.java:523)
      at com.soeasy.aanta.nta.sse.NtaSse$Nta2Sse$Builder.mergeFrom(NtaSse.java:1)
      at com.google.protobuf.AbstractMessage$Builder.mergeFrom(AbstractMessage.java:1)
      at com.google.protobuf.AbstractMessageLite$Builder.mergeFrom(AbstractMessageLite.java:212)
      at com.google.protobuf.AbstractMessage$Builder.mergeFrom(AbstractMessage.java:746)
      at com.google.protobuf.AbstractMessage$Builder.mergeFrom(AbstractMessage.java:1)
      at com.google.protobuf.AbstractMessageLite$Builder.mergeDelimitedFrom(AbstractMessageLite.java:282)
      at com.google.protobuf.AbstractMessage$Builder.mergeDelimitedFrom(AbstractMessage.java:760)
      at com.google.protobuf.AbstractMessageLite$Builder.mergeDelimitedFrom(AbstractMessageLite.java:288)
      at com.google.protobuf.AbstractMessage$Builder.mergeDelimitedFrom(AbstractMessage.java:752)
      at com.soeasy.aanta.nta.sse.NtaSse$Nta2Sse.parseDelimitedFrom(NtaSse.java:338)
      at com.soeasy.aanta.nta.sse.NtaSseServer.main(NtaSseServer.java:60)
  </code></pre>
  
  <p>and the sample _message.txt has the following:</p>
  
  <pre><code>message_id: 1
  batch_meas_update {
    device_update {
      unique_device_id {
        device_type: ME
        device_id: 161
      }
      meas_update {
        override_status: OVERRIDE_INACTIVE
        bad_data_status: GOOD_DATA
        scada_status: SCADA_ACTIVE
        weight: 1.0
        value: 406.596
      }
    }
  }
  </code></pre>
  
  <p>It is in accordance with.proto file</p>
  
  <p>Thanks</p>