ProtobufAnnotationSerializer的问题-Stanford CoreNLP

Question

I tried to use ProtobufAnnotationSerializer to serialize an Annotation object as follow:

String text = "Stanford University is located in California. It is a great university, founded in 1891.";
Annotation document = new Annotation(text);
Properties props = new Properties();
props.setProperty("annotators", "tokenize, ssplit, pos, lemma, ner, parse,depparse");    
StanfordCoreNLP pip = new StanfordCoreNLP(props);
pip.annotate(document);

ProtobufAnnotationSerializer serializer = new ProtobufAnnotationSerializer();
FileOutputStream fileOut = new FileOutputStream("path/to/anno.ser");
ObjectOutputStream out = new ObjectOutputStream(fileOut);
serializer.write(document, out);

This bug came out:

Exception in thread "main" java.lang.VerifyError: Bad type on operand stack
Exception Details:
  Location:
    com/google/protobuf/GeneratedMessageV3$ExtendableMessage.getExtension(Lcom/google/protobuf/Extension;I)Ljava/lang/Object; @3: invokevirtual
  Reason:
    Type 'com/google/protobuf/Extension' (current frame, stack[1]) is not assignable to 'com/google/protobuf/ExtensionLite'
  Current Frame:
    bci: @3
    flags: { }
    locals: { 'com/google/protobuf/GeneratedMessageV3$ExtendableMessage', 'com/google/protobuf/Extension', integer }
    stack: { 'com/google/protobuf/GeneratedMessageV3$ExtendableMessage', 'com/google/protobuf/Extension', integer }
  Bytecode:
    0x0000000: 2a2b 1cb6 0024 b0                      

    at edu.stanford.nlp.pipeline.ProtobufAnnotationSerializer.toProtoBuilder(ProtobufAnnotationSerializer.java:611)
    at edu.stanford.nlp.pipeline.ProtobufAnnotationSerializer.toProto(ProtobufAnnotationSerializer.java:579)
    at edu.stanford.nlp.pipeline.ProtobufAnnotationSerializer.write(ProtobufAnnotationSerializer.java:184)
at xxxxxxxxxxxxxx.main(xxxxxxx.java:303)  \\ line: serializer.write(document, out);

I think that there is an inconsistency between CoreNLP ProtobufAnnotationSerializer and protobuf package. I am using version 3.9.1 downloaded directly from CoreNLP home page , and I even tried some alternative solutions but none of them work. I tried:

• versions 3.9 3.8
• download the package and its dependencies directly from maven
• download and build (with ant) the source code on github.

The error occurs with other languages (i tested with French) and even when calling the server.

Answer 1

糟糕！我的依赖...我的依赖项之一包括protobuf-lite，它与corenlp发生冲突...非常感谢@GaborAngeli