Generated OuterClass has a lot of incompatibilities !

[Smallufo Huang]

Hi , I am new to gRPC / protobuf.

This is my first .proto file :

syntax = "proto3";
option java_package = "destiny.identity.services.grpc";

service EchoService {
    rpc echo (EchoRequest) returns (EchoReply) {}
}

message EchoRequest {
    string name=1;
}

message EchoReply {
    string message = 1;
}

It is simple , but the generated EchoServiceOuterClass.java has a lot of incompatibilities :

~/destiny-identity/target/generated-sources/protobuf/java/destiny/identity/services/grpc/EchoServiceOuterClass.java

Error:(83, 13) java: incompatible types: java.io.IOException cannot be converted to java.lang.String

Error:(152, 18) java: memoizedSize has private access in com.google.protobuf.AbstractMessage

Error:(159, 7) java: memoizedSize has private access in com.google.protobuf.AbstractMessage

Error:(394, 18) java: cannot find symbol

  symbol:   method unwrapIOException()

  location: variable e of type com.google.protobuf.InvalidProtocolBufferException

Error:(586, 13) java: incompatible types: java.io.IOException cannot be converted to java.lang.String

Error:(655, 18) java: memoizedSize has private access in com.google.protobuf.AbstractMessage

Error:(662, 7) java: memoizedSize has private access in com.google.protobuf.AbstractMessage

Error:(897, 18) java: cannot find symbol

  symbol:   method unwrapIOException()

  location: variable e of type com.google.protobuf.InvalidProtocolBufferException

This is my [ partial ] pom.xml

<plugin>
  <groupId>org.xolstice.maven.plugins</groupId>
  <artifactId>protobuf-maven-plugin</artifactId>
  <version>0.5.0</version>
  <configuration>
    <!--
      The version of protoc must match protobuf-java. If you don't depend on
      protobuf-java directly, you will be transitively depending on the
      protobuf-java version that grpc depends on.
    -->
    <protocArtifact>com.google.protobuf:protoc:3.0.0:exe:${os.detected.classifier}</protocArtifact>
    <pluginId>grpc-java</pluginId>
    <pluginArtifact>io.grpc:protoc-gen-grpc-java:1.0.0:exe:${os.detected.classifier}</pluginArtifact>
  </configuration>
  <executions>
    <execution>
      <goals>
        <goal>compile</goal>
        <goal>compile-custom</goal>
      </goals>
    </execution>
  </executions>
</plugin>

The grpc-netty , grpc-protobuf , grpc-stub are all of version of 1.0.0

Where goes wrong here ?

Thanks.

(I don't know whether the problem is related to protobuf or gRPC , so I paste to both forum )

[Feng Xiao]

This indicates a version mismatch between protocol compiler and protobuf runtime. Are you depending the right protobuf-java 3.0.0 version?

 

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[Smallufo Huang]

I am sure I am running version 3.0.0

This is my mvn dependencies :

[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Detecting the operating system and CPU architecture
[INFO] ------------------------------------------------------------------------
[INFO] os.detected.name: osx
[INFO] os.detected.arch: x86_64
[INFO] os.detected.classifier: osx-x86_64
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building destiny-identity 0.0.1
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-dependency-plugin:2.10:tree (default-cli) @ destiny-identity ---
[WARNING] Using Maven 2 dependency tree to get verbose output, which may be inconsistent with actual Maven 3 resolution
[INFO] artifact io.netty:netty-codec-http2: checking for updates from nexus
[INFO] artifact io.netty:netty-codec-http2: checking for updates from spring-snapshots
[INFO] artifact io.netty:netty-codec-http2: checking for updates from spring-milestones
[INFO] artifact io.netty:netty-codec-http2: checking for updates from central
[INFO] artifact io.grpc:grpc-core: checking for updates from nexus
[INFO] artifact io.grpc:grpc-core: checking for updates from spring-snapshots
[INFO] artifact io.grpc:grpc-core: checking for updates from spring-milestones
[INFO] artifact io.grpc:grpc-core: checking for updates from central
[INFO] destiny:destiny-identity:jar:0.0.1
[INFO] +- io.grpc:grpc-netty:jar:1.0.0:compile
[INFO] |  +- io.netty:netty-codec-http2:jar:4.1.3.Final:compile
[INFO] |  |  +- io.netty:netty-codec-http:jar:4.1.3.Final:compile
[INFO] |  |  |  \- io.netty:netty-codec:jar:4.1.3.Final:compile
[INFO] |  |  |     \- (io.netty:netty-transport:jar:4.1.3.Final:compile - omitted for duplicate)
[INFO] |  |  \- io.netty:netty-handler:jar:4.1.3.Final:compile
[INFO] |  |     +- io.netty:netty-buffer:jar:4.1.3.Final:compile
[INFO] |  |     |  \- io.netty:netty-common:jar:4.1.3.Final:compile
[INFO] |  |     +- io.netty:netty-transport:jar:4.1.3.Final:compile
[INFO] |  |     |  +- (io.netty:netty-buffer:jar:4.1.3.Final:compile - omitted for duplicate)
[INFO] |  |     |  \- io.netty:netty-resolver:jar:4.1.3.Final:compile
[INFO] |  |     |     \- (io.netty:netty-common:jar:4.1.3.Final:compile - omitted for duplicate)
[INFO] |  |     \- (io.netty:netty-codec:jar:4.1.3.Final:compile - omitted for duplicate)
[INFO] |  \- io.grpc:grpc-core:jar:1.0.0:compile
[INFO] |     +- (com.google.guava:guava:jar:19.0:compile - omitted for duplicate)
[INFO] |     \- com.google.code.findbugs:jsr305:jar:3.0.0:compile
[INFO] +- io.grpc:grpc-protobuf:jar:1.0.0:compile
[INFO] |  +- com.google.guava:guava:jar:19.0:compile
[INFO] |  +- io.grpc:grpc-protobuf-lite:jar:1.0.0:compile
[INFO] |  |  +- (com.google.guava:guava:jar:19.0:compile - omitted for duplicate)
[INFO] |  |  \- (io.grpc:grpc-core:jar:1.0.0:compile - omitted for duplicate)
[INFO] |  +- com.google.protobuf:protobuf-java:jar:3.0.0:compile
[INFO] |  +- com.google.protobuf:protobuf-java-util:jar:3.0.0:compile
[INFO] |  |  +- (com.google.protobuf:protobuf-java:jar:3.0.0:compile - omitted for duplicate)
[INFO] |  |  +- (com.google.guava:guava:jar:18.0:compile - omitted for conflict with 19.0)
[INFO] |  |  \- com.google.code.gson:gson:jar:2.7:compile (version managed from 2.3)
[INFO] |  \- (io.grpc:grpc-core:jar:1.0.0:compile - omitted for duplicate)
[INFO] +- io.grpc:grpc-stub:jar:1.0.0:compile
[INFO] |  \- (io.grpc:grpc-core:jar:1.0.0:compile - omitted for duplicate)
// skipped

It is com.google.protobuf:protobuf-java:jar:3.0.0:compile , and there are no other protobuf strings in the following skipped dependencies.

Same problem reported to here : https://github.com/grpc/grpc-java/issues/2300

Sorry , not sure where goes wrong , so I post to many places.

Feng Xiao於 2016年9月27日星期二 UTC+8上午2時02分37秒寫道：

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[Smallufo Huang]

OK . I found where goes wrong. 
TIL libphonenumber also dependent on protobuf !
And the project is dependent on an older libphonenumber , not via maven , it is via groovy's @Grab !.
That's why mvn's dependency:tree cannot inspect the problem !
And maybe intelliJ regard groovy's @Grab has higher priority.

Anyway , it is fixed. sorry for disturb.