I have a huge Android (Gradle) project which had been compiling just fine till 07.04.2017 (yesterday) under Android Studio 2.3.
Now I have
    Error:Execution failed for task ':app:compileReleaseJavaWithJavac'.
> Could not expand ZIP 'C:\Users\1\.gradle\caches\modules-2\files-2.1\org.slf4j\slf4j-api\1.8.0-alpha0\3745fbc3ca51456387cf068d66442513898a42f1\slf4j-api-1.8.0-alpha0.jar'.

I am not using slf4j-api directly, but I suppose that some of .aar libs included in my project (or Andoid Studio !?) do that and probably on the "unrestricted" basis, i.e. as:
    compile 'org.slf4j:slf4j-api:1.+'
So, there was no problem before 07.04.2017, but yesterday your have updated your https://www.slf4j.org/dist/ with slf4j-1.8.0-alpha0 and I have got problems.

Would you be so kind to remove this version from your repo, because I am using Java 8 in my project and therefore I can't restrict himself with using of slf4j-1.7.x by means of gradle command. More over I have no idea which of .aar libraries in my project uses slf4j by inappropriate way.