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https://issues.apache.org/jira/browse/HADOOP-13306?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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chillon_m updated HADOOP-13306:
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Summary: adding filter doesnot check if it exists in HttpServer, (was: add
filter doesnot check if it exists in HttpServer)
> adding filter doesnot check if it exists in HttpServer,
> -------------------------------------------------------
>
> Key: HADOOP-13306
> URL: https://issues.apache.org/jira/browse/HADOOP-13306
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.5.2, 2.7.2, 2.7.3, 2.6.4, 3.0.0-alpha1
> Reporter: chillon_m
> Priority: Minor
> Attachments: 0001-HADOOP-13306(hadoop2.5.2).patch
>
>
> hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/http/HttpServer2.java
> line-705(hadoop2.5.2):defineFilter() doesnot check filter if it exists.we
> need check if it exists before add it.so,ervery request/response maybe dealed
> by same filter many times,maybe affect performance
> another,No_Cache_Filter added twice when create a HttpServer2 object.I think
> addDefaultApps() invoke addNoCacheFilter() is unnecessary.because
> addNoCacheFilter() has already been invoked by createWebAppContext() in
> httpServer2 constructor method.every request invoke twice cachefilter.
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