gradle - 失败:由于构建RxJava时无法下载工件，因此构建失败并发生异常

Question

出现以下异常，RxJava项目构建失败的原因可能是什么？

jacek:~/oss/RxJava
$ ./gradlew build -x test
...
:rxjava-contrib:rxjava-android:compileJava
Download http://repo1.maven.org/maven2/xerces/xmlParserAPIs/2.6.2/xmlParserAPIs-2.6.2.pom
Download http://repo1.maven.org/maven2/xerces/xmlParserAPIs/2.6.2/xmlParserAPIs-2.6.2.jar

FAILURE: Build failed with an exception.

* What went wrong:
Could not resolve all dependencies for configuration ':rxjava-contrib:rxjava-android:provided'.
> Could not download artifact 'org.apache.maven:maven-error-diagnostics:2.2.1@jar'
   > Artifact 'org.apache.maven:maven-error-diagnostics:2.2.1@jar' not found.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 48.057 secs

Answer 1

当您看到错误时，很可能您的~/.m2/repository包含部分解析的依赖项(在这种情况下，它是org.apache.maven:maven-error-diagnostics:2.2.1@jar):

$ ls ~/.m2/repository/org/apache/maven/maven-error-diagnostics/2.2.1/
_maven.repositories                     maven-error-diagnostics-2.2.1.pom       maven-error-diagnostics-2.2.1.pom.sha1

只需从 ~/.m2/repository中删除依赖项的目录...

$ rm -rf ~/.m2/repository/org/apache/maven/maven-error-diagnostics/2.2.1/

...然后重新运行构建。现在应该可以正常构建了。

jacek:~/oss/RxJava
$ ./gradlew build -x test
...
:rxjava-contrib:rxjava-swing:build

BUILD SUCCESSFUL

Total time: 1 mins 48.046 secs