[#CDV-244] Serialization of shared objects fails to resolve reference fields

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Serialization of shared objects fails to resolve reference fields

Created: 26/Apr/07 05:13 PM Updated: 26/Sep/08 03:16 PM

Component/s:

DSO:L1

Affects Version/s:

2.7.0-stable1

Fix Version/s:

2.7.0

Issue Links:

Duplicate

This issue is duplicated by:

~~CDV-736~~ SerializationUtils (ObjectOutputStream) doesn't resolve objects

Related

This issue is related to:

~~CDV-863~~ Using CHM with spring web-flow gives NPE

~~CDV-907~~ HashMap Serialization can have unresolved references

Severity:	3 Feature failure (but usable), workaround available
Fix In Branch:	2.7, trunk
Target:	2.7
Fixed In Revision:	10044
Date of First Response:	27/Apr/07 10:19 AM

Description

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From the forums: http://forums.terracotta.org/forums/posts/list/0/226.page

If a shared object is serialized, it possible to observe unresolved reference values. I believe the reason for this is that field values are read using sun.misc.Unsafe.getObject(..). Specifically in java.io.ObjectStreamClass$FieldReflector.getObjFieldValues(). This method of reading field data will bypass the DSO mechanics for resolving fields.

I don't think fields that are DSO literal types are affected since they are never unresolved.

I'm not sure about logical collections -- although I guess they are okay since they implement readObject/writeObject in terms of their iterators which do flow though DSO goodness.

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Comments

Change History

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Tim Eck added a comment - 11/Sep/08 11:18 PM

I think should be fixed in trunk now as of rev 10044

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Scott Bale added a comment - 15/Sep/08 07:57 PM

Looks like still a problem at least for clustered HashMap instances. With Tim's help I've duplicated Himadri's problem by adding to the system test that Tim wrote for this issue.

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Scott Bale added a comment - 16/Sep/08 12:32 PM

similar Serialization issue, both affect Lassen Exam caching

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Scott Bale added a comment - 16/Sep/08 12:34 PM

Alex and I decided there should really be a new JIRA issue, because it is really a new (albeit related) problem (~~CDV-907~~) that has been found. Tim's fix for this issue is fine and needs to be in 2.7 branch.

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Hung Huynh added a comment - 19/Sep/08 04:04 PM

test existed.