Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/5853#discussion_r29540337
--- Diff:
streaming/src/main/scala/org/apache/spark/streaming/rdd/WriteAheadLogBackedBlockRDD.scala
---
@@ -108,9 +110,13 @@ class WriteAheadLogBackedBlockRDD[T: ClassTag](
// writing log data. However, the directory is not needed if
data needs to be read, hence
// a dummy path is provided to satisfy the method parameter
requirements.
// FileBasedWriteAheadLog will not create any file or directory
at that path.
- val dummyDirectory = FileUtils.getTempDirectoryPath()
+ // FileBasedWriteAheadLog will not create any file or directory
at that path. Also,
+ // 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(
+ FileUtils.getTempDirectory(),
UUID.randomUUID().toString).getAbsolutePath
--- End diff --
I keep trying to get rid of uses of commons-io since it is not actually a
Spark dependency. This can be `Utils.createTempDir`? The other usage in
`StreamingContextSuite` can be replaced with Guava. Not exactly the topic of
this PR but might yet be worth doing if you're potentially removing this usage.
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