How to force readObejct query with PK value to go to DB?

The default behaviour for read-object queries with a PK value is to use the cache and not go to the database. How can we change this behaviour?
We have cases that a row was deleted by some other process not through toplink, but the corresponding object still in the cache and if you use the readObject query with PK value, the object will be returned as result.
Thanks in advance,

There are several mechanisms to disable caching in TopLink. Note that disabling caching will affect your performance.
In 9.0.4 you can use:
- You can configure you cache type to use a WeakIdentityMap to ensure that only referenced objects are cached.
- On descriptor you can call disableCacheHits() and alwaysRefreshCache() in code or click these options on the Caching/Identity tab in the Mapping Workbench.
- Or to explicitly remove a deleted object from the cache uses session.removeFromIdentityMap(), but you must ensure there are no other objects referencing it.
In 10.1.3 you can also use:
- On descriptor you can call setIsIsolated(true) in code, or select isolated in the Caching tab in the Mapping Workbench.
- Alternatively you can set a CacheInvalidationPolicy on your descriptor to ensure objects are not cached for longer than a specified time, or invalidated daily.
- Or to explicitly invalidate a deleted object use, session.getIdentityMapAccessor().invalidateObject()

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70210     alert2     0.00
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Message was edited by:
SEM SEM

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