ProtoBuf模式的命名空间错误。

huangapple
go评论95阅读模式
英文:

ProtoBuf schema having wrong namespace

问题

我已经按照你提供的要求，将代码部分翻译成中文，如下所示：

  1. 我已经定义了我的 Protobuf 模式如下：
  3.     message VertexUpdate {
  4.       required VertexId id = 1;
  5.       map<string, google.protobuf.Value> properties = 2;
  6.       optional bool isDelete = 3;
  7.     }
  8.     
  9.     message EdgeUpdate {
  10.       required EdgeId id = 1;
  11.       map<string, google.protobuf.Value> properties = 2;
  12.       optional bool isDelete = 3;
  13.     }
  14.     
  15.     message GraphUpdate {
  16.       required string graphName = 1;
  17.       optional VertexUpdate vertexUpdate = 2;
  18.       optional EdgeUpdate edgeUpdate = 3;
  19.     }
  21. 然后我执行了这段代码：
  23.     Graphaction.GraphUpdate graphUpdate = createGraphUpdateObject();
  24.     Schema schema = ProtobufData.get().getSchema(Graphaction.GraphUpdate.class);
  25.     ProtobufData.get().newRecord(graphUpdate, schema);
  27. 但是这给了我一个错误：
  29.     java.lang.RuntimeException: java.lang.ClassNotFoundException: Failed to load class com.mycompany.protos.kgschema.Graphaction_.GraphUpdate
  30.     	at org.apache.avro.protobuf.ProtobufData.newRecord(ProtobufData.java:144)
  31.     	...
  33. 我不知道为什么类名在模式对象中被指定为 "com.mycompany.protos.kgschema.Graphaction_.GraphUpdate"，我认为这是问题的根本原因。
  35. 为了确认，我尝试了以下这段代码（试图调用引发异常的方法，使用了正确的类名）：
  37.     Class<?> out = org.apache.avro.util.ClassUtils.forName("com.mycompany.protos.kgschema.Graphaction$GraphUpdate");
  39. 这段代码能够正常运行，没有任何错误。
  41. 我不明白为什么类的命名空间会在由 ProtobufData.get().getSchema(Graphaction.GraphUpdate.class) 创建的模式对象中出错，
  43. 同时我想知道如何修复这个问题？任何帮助将不胜感激。

请注意，我已经按照你的要求，只返回翻译好的部分，没有包含其他内容。如果你有任何其他问题或需要进一步帮助，请随时提问。

英文:

I have defined my Protobuf schema like this

  1. message VertexUpdate {
  2.   required VertexId id = 1;
  3.   map&lt;string, google.protobuf.Value&gt; properties = 2;
  4.   optional bool isDelete = 3;
  5. }
  7. message EdgeUpdate {
  8.   required EdgeId id = 1;
  9.   map&lt;string, google.protobuf.Value&gt; properties = 2;
  10.   optional bool isDelete = 3;
  11. }
  13. message GraphUpdate {
  14.   required string graphName = 1;
  15.   optional VertexUpdate vertexUpdate = 2;
  16.   optional EdgeUpdate edgeUpdate = 3;
  17. }

and I am executing this code

  1. Graphaction.GraphUpdate graphUpdate = createGraphUpdateObject();
  2. Schema schema = ProtobufData.get().getSchema(Graphaction.GraphUpdate.class);
  3. ProtobufData.get().newRecord(graphUpdate, schema);

which gives me error

  1. java.lang.RuntimeException: java.lang.ClassNotFoundException: Failed to load class com.mycompany.protos.kgschema.Graphaction_.GraphUpdate
  2. 	at org.apache.avro.protobuf.ProtobufData.newRecord(ProtobufData.java:144)
  3. 	at com.mycompany.knowledge.graph.ingest.backfill.hlc.GraphUpdateDataIngestorTest.test2(GraphUpdateDataIngestorTest.java:53)
  4. 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  5. 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  6. 	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  7. 	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
  8. 	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
  9. 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
  10. 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
  11. 	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
  12. 	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
  13. 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
  14. 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
  15. 	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
  16. 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
  17. 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
  18. 	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
  19. 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
  20. 	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
  21. 	at com.google.testing.junit.runner.internal.junit4.CancellableRequestFactory$CancellableRunner.run(CancellableRequestFactory.java:108)
  22. 	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
  23. 	at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
  24. 	at com.google.testing.junit.runner.junit4.JUnit4Runner.run(JUnit4Runner.java:116)
  25. 	at com.google.testing.junit.runner.BazelTestRunner.runTestsInSuite(BazelTestRunner.java:159)
  26. 	at com.google.testing.junit.runner.BazelTestRunner.main(BazelTestRunner.java:85)
  27. Caused by: java.lang.ClassNotFoundException: Failed to load class com.mycompany.protos.kgschema.Graphaction_.GraphUpdate
  28. 	at org.apache.avro.util.ClassUtils.forName(ClassUtils.java:60)
  29. 	at org.apache.avro.util.ClassUtils.forName(ClassUtils.java:36)
  30. 	at org.apache.avro.protobuf.ProtobufData.newRecord(ProtobufData.java:136)
  31. 	... 24 more

I don't know why class name is mentioned in schema object as "com.mycompany.protos.kgschema.Graphaction_.GraphUpdate" which I think is root cause of this issue.

To confirm that I tried out this code ( trying method call which is causing exception with correct class name )

  1. Class&lt;?&gt; out =
  2.         org.apache.avro.util.ClassUtils.forName(&quot;com.mycompany.protos.kgschema.Graphaction$GraphUpdate&quot;);

and it works fine without any error.

I don't understand why class namespace is coming wrong in schema object created by
ProtobufData.get().getSchema(Graphaction.GraphUpdate.class)

also what is way to fix it ? Any help is appreciated.

答案1

得分: 0

我发现这是Avro-protobuf 1.8版本的一个问题，已在1.9版本及以后得到修复。

英文:

I found that this is a issue with Avro-protobuf version 1.8 and is fixed in 1.9 version onwards

huangapple
  • 本文由 发表于 2020年10月2日 00:50:28
  • 转载请务必保留本文链接：https://go.coder-hub.com/64159924.html
  • avro
  • java
  • proto
  • protocol-buffers
匿名

发表评论

匿名网友

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

确定