Sharing instance of NumberFormat can cause diffrent results about springfilter HOT 6 CLOSED

@skamv

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@capussopy Thanks for noticing about this. I think that we have a similar issue with SimpleDateFormat, which is not thread safe too. It should be possible to wrap these fields with ThreadLocal, do you have other solutions?

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@torshid This is true. The Javadoc for SimpleDateFormat says:

Date formats are not synchronized. It is recommended to create separate format instances for each thread. If multiple threads access a format concurrently, it must be synchronized externally.

yes, you can use Threadlocal or create a new instance in each thread. I think the solution with ThreadLocal should have the better performance. But im not 100% sure.

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@torshid any updates on this?

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any updates?

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Fixed in https://github.com/turkraft/spring-filter/releases/tag/2.1.2.

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