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https://issues.apache.org/jira/browse/SPARK-21348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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duyanghao closed SPARK-21348.
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Resolution: Duplicate
> Spark history Server load too slow when eventlog is large
> ---------------------------------------------------------
>
> Key: SPARK-21348
> URL: https://issues.apache.org/jira/browse/SPARK-21348
> Project: Spark
> Issue Type: Bug
> Components: Web UI
> Affects Versions: 2.1.0
> Reporter: duyanghao
> Priority: Critical
>
> There is a eventlog file in hdfs as below:
> ```
> -rwxrwx--- 3 root supergroup 9634238709 2017-07-08 04:37
> hdfs://xxxxx/shared/spark-logs/xxxxx/xxxx.lz4
> ```
> and i start a spark history server to loading that eventlog file,but it is
> too slow to get spark web ui through that spark history server.
> it has requested for several hours but nothing about spark application web ui
> appears in the browser
> And the cpu usage of spark history server is 105.3%
> total used-memory in host is 9G
> The host has 48 Cores+130G Memory,enough Computing resources for spark
> history server.
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