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https://issues.apache.org/jira/browse/SPARK-4820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14257116#comment-14257116
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Iljya Kalai commented on SPARK-4820:
------------------------------------

Thanks for creating this issue, and thanks to Luchesar for providing a 
workaround. Are the ramifications of pulling this into the head repository 
known? It would be great if compiling on encrypted drives just worked. It's a 
bit unfortunate that new Spark users with encrypted drives will get slammed by 
this issue upon trying to compile Spark for the first time.

> Spark build encounters "File name too long" on some encrypted filesystems
> -------------------------------------------------------------------------
>
>                 Key: SPARK-4820
>                 URL: https://issues.apache.org/jira/browse/SPARK-4820
>             Project: Spark
>          Issue Type: Bug
>            Reporter: Patrick Wendell
>
> This was reported by Luchesar Cekov on github along with a proposed fix. The 
> fix has some potential downstream issues (it will modify the classnames) so 
> until we understand better how many users are affected we aren't going to 
> merge it. However, I'd like to include the issue and workaround here. If you 
> encounter this issue please comment on the JIRA so we can assess the 
> frequency.
> The issue produces this error:
> {code}
> [error] == Expanded type of tree ==
> [error] 
> [error] ConstantType(value = Constant(Throwable))
> [error] 
> [error] uncaught exception during compilation: java.io.IOException
> [error] File name too long
> [error] two errors found
> {code}
> The workaround is in maven under the compile options add: 
> {code}
> +              <arg>-Xmax-classfile-name</arg>
> +              <arg>128</arg>
> {code}
> In SBT add:
> {code}
> +    scalacOptions in Compile ++= Seq("-Xmax-classfile-name", "128"),
> {code}



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