RFR: 8282730: LdapLoginModule throw NPE from logout method after login failure [v3]

[Weijun Wang]

On Sat, 16 Jul 2022 13:46:58 GMT, Weijun Wang <weijun at openjdk.org> wrote:

>> Add null-checks in all `LoginModule` implementations. It's possible that an application calls `logout` after a login failure, where most internal variables for principals and credentials are null and removing a null from the `Subject`'s principals and credentials sets will trigger a `NullPointerException`.
>
> Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   more comment

Thanks. CSR is filed at https://bugs.openjdk.org/browse/JDK-8290119. I've also written a release note at https://bugs.openjdk.org/browse/JDK-8290467. Please take a review.

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PR: https://git.openjdk.org/jdk/pull/9348