[jira] Updated: (NUTCH-471) Fix synchronization in NutchBean creation

["Enis Soztutar (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NUTCH-471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Enis Soztutar updated NUTCH-471:
--------------------------------

    Attachment: NutchBeanCreationSync_v1.patch

this patch synchronizes NutchBean.get((ServletContext app, Configuration conf) using servlet context as mutex. (NutchBean)app.getAttribute("nutchBean") is checked twice, the first one is not synchronized for performance reasons. 

> Fix synchronization in NutchBean creation
> -----------------------------------------
>
>                 Key: NUTCH-471
>                 URL: https://issues.apache.org/jira/browse/NUTCH-471
>             Project: Nutch
>          Issue Type: Bug
>          Components: searcher
>    Affects Versions: 1.0.0
>            Reporter: Enis Soztutar
>             Fix For: 1.0.0
>
>         Attachments: NutchBeanCreationSync_v1.patch
>
>
> NutchBean is created and then cached in servlet context. But NutchBean.get(ServletContext app, Configuration conf) is not syncronized, which causes more than one instance of the bean (and DistributedSearch$Client) if servlet container is accessed rapidly during startup. 

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