[jira] [Resolved] (SPARK-7477) TachyonBlockManager Store Block in TRY_CACHE mode which gives BlockNotFoundException when blocks are evicted from cache

["Josh Rosen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-7477?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Josh Rosen resolved SPARK-7477.
-------------------------------
    Resolution: Cannot Reproduce

Resolving as "Cannot Reproduce" / "Won't Fix" for now. Due to the removal of the ExternalBlockStore API in SPARK-12667, this issue should no longer be relevant for Spark 2.x.

> TachyonBlockManager Store Block in TRY_CACHE mode which gives BlockNotFoundException when blocks are evicted from cache
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-7477
>                 URL: https://issues.apache.org/jira/browse/SPARK-7477
>             Project: Spark
>          Issue Type: Bug
>          Components: Block Manager
>    Affects Versions: 1.4.0
>            Reporter: Dibyendu Bhattacharya
>
> With Spark Streaming on Tachyon as the OFF_HEAP block store 
> I have used the low level Receiver based Kafka consumer (http://spark-packages.org/package/dibbhatt/kafka-spark-consumer) for Spark Streaming to pull from Kafka and write Blocks to Tachyon 
> What I see TachyonBlockManager.scala put the blocks in WriteType.TRY_CACHE configuration . And because of this Blocks ate evicted from Tachyon Cache and when Spark try to find the block it throws  BlockNotFoundException . 
> When I modified the WriteType to CACHE_THROUGH , BlockDropException is gone , but it impact the throughput ..



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