[jira] [Updated] (OAK-1869) TarMK: Incorrect tar entry verification in recovery mode

["Jukka Zitting (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OAK-1869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jukka Zitting updated OAK-1869:
-------------------------------

    Fix Version/s: 1.0.1

Merged to the 1.0 branch for the 1.0.1 release in revision 1599306 as the impact of this bug is pretty bad even though it only occurs in an already abnormal situation.

> TarMK: Incorrect tar entry verification in recovery mode
> --------------------------------------------------------
>
>                 Key: OAK-1869
>                 URL: https://issues.apache.org/jira/browse/OAK-1869
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: core, segmentmk
>            Reporter: Jukka Zitting
>            Assignee: Jukka Zitting
>            Priority: Critical
>             Fix For: 1.0.1, 1.1
>
>
> When recovering segments from a forcibly closed tar file (i.e. one without a proper tar index), the TarMK will scan all tar entries and verify their checksums. Unfortunately that checksum verification is incorrect, which leads to a lot of errors like the one below, and to the affected segments being discarded.
> {noformat}
> Invalid entry checksum at offset NNNNN in tar file /path/to/dataNNNNNNx.tar, skipping...
> {noformat}
> In practice this leads to the TarMK undoing a lot of recent changes until it finds a segment that hasn't been discarded because of such an incorrect checksum verification.



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