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https://issues.apache.org/jira/browse/SPARK-22831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dingdong closed SPARK-22831.
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> Long running spark app gets slower and slower over time,Maybe cause by
> unsafe/Platform
> --------------------------------------------------------------------------------------
>
> Key: SPARK-22831
> URL: https://issues.apache.org/jira/browse/SPARK-22831
> Project: Spark
> Issue Type: Bug
> Components: Java API, Spark Core, SQL
> Affects Versions: 2.1.0
> Environment: * Linux
> * yarn-client
> * jdk7
> * spark2.1
> * scala-2.11.8
> Reporter: dingdong
>
> I have a long running spark app running on yarn.I load the data which is
> about 150G from hbase and cached it in the memory.
> This app provide ad-hoc query with sparkSql.At the beginning,the spark is
> very fast that just take a few seconds per job.
> But after a few hours later,the spark running slower and slower until take
> over one minute per job.After profiling with jvisualvm,I found that the
> methods of unsafe/platform (Platform.getLong etc) take most of the time.
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