Github user vanzin commented on a diff in the pull request: https://github.com/apache/spark/pull/22867#discussion_r231292508 --- Diff: streaming/src/main/scala/org/apache/spark/streaming/rdd/WriteAheadLogBackedBlockRDD.scala --- @@ -136,7 +139,7 @@ class WriteAheadLogBackedBlockRDD[T: ClassTag]( // this dummy directory should not already exist otherwise the WAL will try to recover // past events from the directory and throw errors. val nonExistentDirectory = new File( - System.getProperty("java.io.tmpdir"), UUID.randomUUID().toString).getAbsolutePath + tmpDir, UUID.randomUUID().toString).getAbsolutePath --- End diff -- Basically what I'm suggesting with my latest top-level comment, and what I first suggested here, is to replace `getAbsolutePath` in this line with `.toURI().toString()`.
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