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From "Stefania (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10421) Potential issue with LogTransaction as it only checks in a single directory for files
Date Thu, 01 Oct 2015 00:34:04 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14939108#comment-14939108
] 

Stefania commented on CASSANDRA-10421:
--------------------------------------

If we can have a transaction involving sstables located in different folders, or the txn log
can end up in a totally different folder as it seems to be the case, then {{LogRecord.getExistingFiles()}}
definitely needs to be fixed. However, we then have a bigger problem in listing temporary
files, in that {{LogAwareFileLister}} assumes the txn log is located in the folder it is listing
so we might miss temporary files when listing. We would have to either search for txn logs
in multiple folders or pin them to a dedicated folder or enhance {{LogAwareFileLister}} to
list all the sstable possible folders.

[~benedict] WDYT? 

> Potential issue with LogTransaction as it only checks in a single directory for files
> -------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-10421
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10421
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Marcus Eriksson
>            Assignee: Stefania
>
> When creating a new LogTransaction we try to create the new logfile in the same directory
as the one we are writing to, but as we use {{[directories.getDirectoryForNewSSTables()|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/db/lifecycle/LogTransaction.java#L125]}}
this might end up in "any" of the configured data directories. If it does, we will not be
able to clean up leftovers as we check for files in the same directory as the logfile was
created: https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/db/lifecycle/LogRecord.java#L163
> cc [~Stefania]



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