[jira] Reopened: (CASSANDRA-1898) json2sstable should support streaming

["Nick Bailey (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-1898?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Nick Bailey reopened CASSANDRA-1898:
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This breaks if a row is skipped during the export of the sstable. Currently this can happen if there is an IOException while deserializing or an OOM for an extremely large row. 

CASSANDRA-1877 will also hopefully make export skip other corruption as well.

The problem here is the export will cause a line with only a ',' to be added to the json file.

> json2sstable should support streaming
> -------------------------------------
>
>                 Key: CASSANDRA-1898
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1898
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Nick Bailey
>            Assignee: Pavel Yaskevich
>             Fix For: 0.7.1
>
>         Attachments: CASSANDRA-1898-v2.patch, CASSANDRA-1898-v3.patch, CASSANDRA-1898-v4.patch, CASSANDRA-1898.patch
>
>   Original Estimate: 8h
>          Time Spent: 8h
>  Remaining Estimate: 0h
>
> json2sstable loads the entire json file into memory. This is so it can sort the file before creating an sstable. If the file was created using sstable2json and the partitioner isn't changing, this isn't necessary.  For very large files this means json2sstable requires a huge amount of memory.
> There should be an option to stream the file. A simple check for out of order keys will prevent writing bad sstables.
> This should be possible with the SAX style parser available in our current json library.

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