[jira] [Updated] (OAK-926) MongoMK: split documents when they are too large

["Marcel Reutegger (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OAK-926?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marcel Reutegger updated OAK-926:
---------------------------------

    Assignee: Marcel Reutegger

I will start working on a proper implementation.
                
> MongoMK: split documents when they are too large
> ------------------------------------------------
>
>                 Key: OAK-926
>                 URL: https://issues.apache.org/jira/browse/OAK-926
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: mongomk
>            Reporter: Thomas Mueller
>            Assignee: Marcel Reutegger
>
> Currently, the MongoMK stores all revisions of a node in the same document. Once there are many revisions, the document gets very large.
> The plan is to split the document when it gets big.
> It looks like this isn't just a "nice to have", but also a problem for some use cases. Example stack trace:
> {code}
> 21.07.2013 12:35:47.554 *ERROR* ...
> Caused by: java.lang.IllegalArgumentException: 'ok' should never be null...
> 	at com.mongodb.CommandResult.ok(CommandResult.java:48)
> 	at com.mongodb.DBCollection.findAndModify(DBCollection.java:375)
> 	at org.apache.jackrabbit.oak.plugins.mongomk.MongoDocumentStore.findAndModify(MongoDocumentStore.java:302)
> 	... 32 more
> {code}
> at the same time in the MongoDB log:
> {code}
> Sun Jul 21 12:35:47.334 [conn7] warning: log line attempted (159k) over max size(10k), 
> printing beginning and end ... 
> Assertion: 10334:BSONObj size: 16795219 (0x53460001) is invalid. 
> Size must be between 0 and 16793600(16MB) 
> First element: :childOrder: { r1400279f22d-0-1: "[]", ...
> {code}

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