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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2017/06/02 21:45:04 UTC

[jira] [Updated] (HBASE-18152) [AMv2] Corrupt Procedure WAL file; procedure data stored out of order

     [ https://issues.apache.org/jira/browse/HBASE-18152?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

stack updated HBASE-18152:
--------------------------
    Attachment: reading_bad_wal.patch

Some harkery reading a bad procecure WAL

> [AMv2] Corrupt Procedure WAL file; procedure data stored out of order
> ---------------------------------------------------------------------
>
>                 Key: HBASE-18152
>                 URL: https://issues.apache.org/jira/browse/HBASE-18152
>             Project: HBase
>          Issue Type: Bug
>          Components: Region Assignment
>    Affects Versions: 2.0.0
>            Reporter: stack
>            Assignee: stack
>            Priority: Critical
>             Fix For: 2.0.0
>
>         Attachments: reading_bad_wal.patch
>
>
> I've seen corruption from time-to-time testing.  Its rare enough. Often we can get over it but sometimes we can't. It took me a while to capture an instance of corruption. Turns out we are write to the WAL out-of-order which undoes a basic tenet; that WAL content is ordered in line w/ execution.
> Below I'll post a corrupt WAL.
> Looking at the write-side, there is a lot going on. I'm not clear on how we could write out of order. Will try and get more insight. Meantime parking this issue here to fill data into.



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