Re: NullPointerException in LRUMap.reuseMapping (was DataRowStore.processUpdatedSnapshots)

From: Andrus Adamchik (andru..bjectstyle.org)
Date: Tue Jun 13 2006 - 11:46:35 EDT

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    On Jun 13, 2006, at 7:38 PM, Lothar Krenzien wrote:

    > Thanks for answer.
    >
    > I've synchronized all acces to the member fields "snapshots" and
    > "snapshotLists" (which are of type LRUMap) ) in the class
    > "DataRowStore" and the problem went away. Additionally I changed
    > the visibility for this two fields from "protected" to "private"
    > and created a (synchronized) getter for both. In the class
    > "DataDomainQueryAction" in method "interceptOIDQuery" I changed
    > the line 187 from "cache.snapshots" to "cache.getSnapshots()" so
    > that I use the new created getter instead of direct access to the
    > field.
    >
    > If it helps you I could send you the changed sources or check in it
    > in subversion.
    >
    > Hope that helps
    > Lothar

    Your confirmation of the problem cause definitely helps. Probably no
    need to send the patch - I still want to poke around to figure out
    the best synchronization strategy that doesn't affect performance too
    much.

    Andrus

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