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Posted to oak-issues@jackrabbit.apache.org by "Francesco Mari (JIRA)" <ji...@apache.org> on 2016/11/01 15:56:58 UTC

[jira] [Updated] (OAK-4274) Memory-mapped files can't be explicitly unmapped

     [ 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: 1.5.14)
                       (was: 1.6)

> 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
>
> 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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