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https://issues.apache.org/jira/browse/LUCENE-1473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12653972#action_12653972
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Doug Cutting commented on LUCENE-1473:
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> I guarantee 2.9 and above classes will be backward compatible with the
> previous classes.
It sounds like you are personally guaranteeing that all serializeable classes
will be forever compatible. That's not what we'd need. We'd need a proposed
policy for the project to consider in terms of major and minor releases,
specifying forward and/or backward compatibility guarantees. For example, we
might say, "within a major release cycle, serialized queries from older
releases will work with newer releases, however serialized queries from newer
releases will not generally work with older releases, since we might add new
kinds of queries in the course of a major release cycle". Similarly detailed
statements would need to be made for each Externalizeable, no?
> Implement standard Serialization across Lucene versions
> -------------------------------------------------------
>
> Key: LUCENE-1473
> URL: https://issues.apache.org/jira/browse/LUCENE-1473
> Project: Lucene - Java
> Issue Type: Bug
> Components: Search
> Affects Versions: 2.4
> Reporter: Jason Rutherglen
> Priority: Minor
> Attachments: LUCENE-1473.patch, LUCENE-1473.patch, LUCENE-1473.patch
>
> Original Estimate: 8h
> Remaining Estimate: 8h
>
> To maintain serialization compatibility between Lucene versions,
> serialVersionUID needs to be added to classes that implement
> java.io.Serializable. java.io.Externalizable may be implemented in classes
> for faster performance.
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