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Getting "javadoc: error - invalid flag: -html4" when trying to build

See original GitHub issue

What version of gRPC-Java are you using?

I am on master branch. git status gives this

On branch master
Your branch is up to date with 'origin/master'.

What is your environment?

I am using ubuntu 18.04

openjdk 11.0.9.1 2020-11-04
OpenJDK Runtime Environment (build 11.0.9.1+1-Ubuntu-0ubuntu1.18.04)
OpenJDK 64-Bit Server VM (build 11.0.9.1+1-Ubuntu-0ubuntu1.18.04, mixed mode, sharing)

Gradle

------------------------------------------------------------
Gradle 5.6.2
------------------------------------------------------------

Build time:   2019-09-05 16:13:54 UTC
Revision:     55a5e53d855db8fc7b0e494412fc624051a8e781

Kotlin:       1.3.41
Groovy:       2.5.4
Ant:          Apache Ant(TM) version 1.9.14 compiled on March 12 2019
JVM:          11.0.9.1 (Ubuntu 11.0.9.1+1-Ubuntu-0ubuntu1.18.04)
OS:           Linux 4.15.0-123-generic amd64

What did you expect to see?

I was following steps in building grpc-java, with all prerequisites (including protobuf) and expected a successful build using gradle.

What did you see instead?

While trying to ./gradlew build with skip android in gradle.properties I got error

javadoc: error - invalid flag: -html4

Steps to reproduce the bug

Just run ./gradlew build

How did I fix it

I commented out line 282 in build.gradle

if (JavaVersion.current().isJava10Compatible()) {
        allprojects {
            tasks.withType(Javadoc) {
=======>>>   //options.addBooleanOption('html4', true)
            }
        }
    }

I know this is not the ideal way to do this. Can anyone provide more information on this? Thanks!

Issue Analytics

State:
Created 3 years ago
Comments:8 (8 by maintainers)

Top GitHub Comments

1reaction

dapengzhang0commented, Nov 23, 2020

Fixed by #7645. Thank you @amnox

1reaction

dapengzhang0commented, Nov 18, 2020

I tried to change that option to html5 aswell but got same error.

Then seems both options are removed in newer jdk. So we might as well remove line 282 in build.gradle and we don’t care too much about java 10 because it is not a long term supported version.