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From "Josh Rosen (JIRA)" <>
Subject [jira] [Updated] (SPARK-7689) Remove TTL-based metadata cleaning (spark.cleaner.ttl)
Date Wed, 06 Jan 2016 22:23:39 GMT


Josh Rosen updated SPARK-7689:
    Labels: releasenotes  (was: )

> Remove TTL-based metadata cleaning (spark.cleaner.ttl)
> ------------------------------------------------------
>                 Key: SPARK-7689
>                 URL:
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Spark Core
>            Reporter: Josh Rosen
>            Assignee: Apache Spark
>              Labels: releasenotes
> With the introduction of ContextCleaner, I think there's no longer any reason for most
users to enable the MetadataCleaner / {{spark.cleaner.ttl}} (except perhaps for super-long-lived
Spark REPLs where you're worried about orphaning RDDs or broadcast variables in your REPL
history and having them never get cleaned up, although I think this is an uncommon use-case).
 I think that this property used to be relevant for Spark Streaming jobs, but I think that's
no longer the case since the latest Streaming docs have removed all mentions of {{spark.cleaner.ttl}}
for example).
> See
for an old, related discussion.  Also, see, the PR
that introduced the new ContextCleaner mechanism.
> For Spark 2.0, I think we should remove {{spark.cleaner.ttl}} and the associated TTL-based
metadata cleaning code.

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