Github user jeanlyn commented on a diff in the pull request:
https://github.com/apache/spark/pull/7927#discussion_r36182313
--- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala
---
@@ -592,8 +592,14 @@ private[spark] class BlockManager(
val locations = Random.shuffle(master.getLocations(blockId))
for (loc <- locations) {
logDebug(s"Getting remote block $blockId from $loc")
- val data = blockTransferService.fetchBlockSync(
- loc.host, loc.port, loc.executorId,
blockId.toString).nioByteBuffer()
+ val data = try {
+ blockTransferService.fetchBlockSync(
+ loc.host, loc.port, loc.executorId,
blockId.toString).nioByteBuffer()
+ } catch {
+ case e: Throwable =>
+ logWarning(s"Exception during getting remote block $blockId from
$loc", e)
--- End diff --
Thanks @srowen and @CodingCat for comments!
* If i am understanding correctly,the `doGetRemote` here will return `None`
when fetched all the same block is null, and all the method which called the
`doGetRemote` will handle the `None` case and throw exception when
necessary,so i think it's safe here to catch the exception
* `fetchBlockSync` just call `fetchBlocks` to fetch the block,so i think
it's the same we catch exception here.
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