[jira] [Created] (OAK-3141) [DocumentNodeStore] Oak should warn when large documents are written

["Jörg Hoh (JIRA)" <ji...@apache.org>]

Jörg Hoh created OAK-3141:
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             Summary: [DocumentNodeStore] Oak should warn when large documents are written
                 Key: OAK-3141
                 URL: https://issues.apache.org/jira/browse/OAK-3141
             Project: Jackrabbit Oak
          Issue Type: Improvement
          Components: core
    Affects Versions: 1.0.16
            Reporter: Jörg Hoh


When working with the RDBMK we came into situations, that large documents did not fit into the provided db columns, there was an overflow, which caused oak not to persist the change. We fixed it by increasing the size of the column.

But it would be nice if Oak could warn if a document exceeds a certain size (for example 2 megabytes); because this warning indicates, that on a JCR level there might be a problematic situation, for example:

* ordered node with a large list of childnodes
* or longstanding sessions with lots of changes, which accumulate to large documents.

It's certainly nice to know if there's a node/document with such a problem, before the exceptions actually happens and an operation breaks.

This message should be a warning, and should contain the JCR path of the node plus the current size. To avoid that this message is overseen, it would be good if it is written everyonce in a while (every 10 minutes?) if this condition persists.






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