Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/5732#discussion_r29430355
--- Diff:
streaming/src/main/scala/org/apache/spark/streaming/rdd/WriteAheadLogBackedBlockRDD.scala
---
@@ -40,21 +40,29 @@ private[streaming]
class WriteAheadLogBackedBlockRDDPartition(
val index: Int,
val blockId: BlockId,
- val walRecordHandle: WriteAheadLogRecordHandle)
- extends Partition
+ val isBlockIdValid: Boolean,
+ val walRecordHandle: WriteAheadLogRecordHandle
+ ) extends Partition
/**
* This class represents a special case of the BlockRDD where the data
blocks in
* the block manager are also backed by data in write ahead logs. For
reading
* the data, this RDD first looks up the blocks by their ids in the block
manager.
- * If it does not find them, it looks up the corresponding data in the
write ahead log.
+ * If it does not find them, it looks up the corresponding file segment.
The finding
--- End diff --
should we here specifically mention "file segment", or just
`walRecordHandles`? Since WAL is pluggable, it might not have to be file
segment.
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