[infinispan-issues] [JBoss JIRA] (ISPN-12062) Fail fast if a collection is modified during marshalling

[Nistor Adrian (Jira)]

    [ https://issues.redhat.com/browse/ISPN-12062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14181273#comment-14181273 ] 

Nistor Adrian commented on ISPN-12062:
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But we could be in luck if looking elsewhere. Some marshalling formats, like protobuf, do not write the size for collections, just the elements, so they would never visibly experience the issue in a catastrophic manner. But the problem still remains, in user code: an object should never be modified after it was handed over to the marshalling layer, or after being put in the cache.

> Fail fast if a collection is modified during marshalling
> --------------------------------------------------------
>
>                 Key: ISPN-12062
>                 URL: https://issues.redhat.com/browse/ISPN-12062
>             Project: Infinispan
>          Issue Type: Enhancement
>          Components: Marshalling
>    Affects Versions: 11.0.0.Final, 10.1.8.Final
>            Reporter: Dan Berindei
>            Priority: Major
>             Fix For: 12.0.0.Final
>
>
> If a collection is modified by a different thread during marshalling, the serialization usually fails with a {{ConcurrentModificationException}}. But in rare cases, {{MarshallUti.marshallCollection()}} may succeed to write a size of {{X}} and then {{Y}} elements.
> {{MarshallUti.marshallCollection()}} could keep track of how many elements it writes and throw an exception at the end if the number of elements it wrote is different from the size it wrote.



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