Opened 13 years ago

Closed 13 years ago

Last modified 13 years ago

#1647 closed defect (fixed)

King.Oracle layer previews can render feature source indefinitely busy and crash the mapagent handler

Reported by: jng Owned by:
Priority: high Milestone: 2.2
Component: Map Agent Version: 2.2.0
Severity: blocker Keywords:
Cc: zspitzer, trevorwekel External ID:


We've discovered a serious defect with the King.Oracle provider with regards to the SpatialExtents() aggregate function.

Instead of returning one result (the computed MBR) of a given feature class, it instead returns the same computed MBR for each result in the feature class!

This problem can easily manifest itself when previewing a King.Oracle based Layer Definition in Maestro or MapGuide Studio as this aggregate function is used to get a preview-ready MBR.

For a moderately large Oracle table, this will crash the mapagent handler and send the King.Oracle feature source into a semi-permanent locked state in the feature source cache (ie. Attempts to overwrite the feature source will throw "resource is busy" errors).

When you do the layer preview, the access.log file is flooded with GetDataRows() calls, which is the provider returning the same MBR for each row in the oracle table.

A proposed solution has already been given to Haris to fix this defect in the provider. This ticket is simply to indicate the release-blocking severity of this defect.

Change History (2)

comment:1 by jng, 13 years ago

Resolution: fixed
Status: newclosed

The 0.8.28 release of the King.Oracle provider resolves this issue. The final build of the 2.2 release needs to bundle this version of the provider.

comment:2 by zspitzer, 13 years ago

tested with 2.2 RC4 and MGE 2011, works great!

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