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From "Francesco Mari (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (OAK-4274) Memory-mapped files can't be explicitly unmapped
Date Thu, 14 Jul 2016 19:58:22 GMT

     [ https://issues.apache.org/jira/browse/OAK-4274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Francesco Mari updated OAK-4274:
--------------------------------
    Fix Version/s:     (was: Segment Tar 0.0.4)
                   Segment Tar 0.0.6

> Memory-mapped files can't be explicitly unmapped
> ------------------------------------------------
>
>                 Key: OAK-4274
>                 URL: https://issues.apache.org/jira/browse/OAK-4274
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: segment-tar, segmentmk
>            Reporter: Francesco Mari
>              Labels: gc, resilience
>             Fix For: 1.6, Segment Tar 0.0.6
>
>
> As described by [this JDK bug|http://bugs.java.com/view_bug.do?bug_id=4724038], there
is no way to explicitly unmap memory mapped files. A memory mapped file is unmapped only if
the corresponding {{MappedByteBuffer}} is garbage collected by the JVM.



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