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From "Wei-Chiu Chuang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-15638) KMS Accept Queue Size default changed from 500 to 128 in Hadoop 3.x
Date Fri, 27 Jul 2018 23:23:00 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-15638?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Wei-Chiu Chuang updated HADOOP-15638:
-------------------------------------
    Component/s: kms

> KMS Accept Queue Size default changed from 500 to 128 in Hadoop 3.x
> -------------------------------------------------------------------
>
>                 Key: HADOOP-15638
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15638
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: kms
>    Affects Versions: 3.0.0-alpha2
>            Reporter: Wei-Chiu Chuang
>            Priority: Major
>
> HADOOP-13597 migrated KMS from Tomcat to Jetty.
> In Hadoop 2.x, the Accept Queue Size default value was set by environment variable KMS_ACCEPT_QUEUE
with default value 500.
> But after the migration, Hadoop 3.x now uses the default HttpServer2 configuration to
set accept queue size (hadoop.http.socket.backlog.size), which is 128.
> Should we restore the default accept queue size in kms-default.xml? Should we document
it as a known issue? After all, Hadoop 2 --> 3 allows breaking changing.



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