Dibyendu Bhattacharya created SPARK-7477:
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Summary: 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) 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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