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8343250: ArrayBlockingQueue serialization not thread safe #21783

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@kabutz kabutz commented Oct 30, 2024

The ArrayBlockingQueue has had a readObject() method since Java 7, which checks invariants of the deserialized object. However, it does not have a writeObject() method. This means that the ArrayBlockingQueue could be modified whilst it is being written, resulting in broken invariants. The readObject() method's invariant checking is not exhaustive, which means that it is possible to end up with ArrayBlockingQueue instances that contain null values, leading to a difference between "size()" and how many objects would be returned with "poll()".

The ABQ should get a writeObject() method that is locking on the same locks as the rest of the class.


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  • JDK-8343250: ArrayBlockingQueue serialization not thread safe (Enhancement - P4)

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  • @dmlloyd (no known openjdk.org user name / role)

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https://git.openjdk.org/jdk/pull/21783.diff

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bridgekeeper bot commented Oct 30, 2024

👋 Welcome back kabutz! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

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❗ This change is not yet ready to be integrated.
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@openjdk openjdk bot added the rfr Pull request is ready for review label Oct 30, 2024
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@kabutz The following label will be automatically applied to this pull request:

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