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Update akka 2.5.16 #8590

merged 2 commits into from Sep 4, 2018


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marcospereira commented Aug 31, 2018


This backports #8437 and #8589 so that we can have an updated version of Akka in Play 2.6.x.

Akka 2.5.12 introduced a fix that causes source compatibility issues (see akka/akka#24575). This should not affect most of the users though. Also, Akka 2.5.13 brings some API changes for Akka Typed and if you are using it in your Play application, there are some changes you need to make. These changes are okay according to Akka binary policy rules since Akka Typed is still marked as a "may change" module. Internally, Play does not uses Akka Typed, so these changes don't affect us.

Background Context

We need to update Akka version now because there is a security fix in Akka 2.5.16.



schmitch and others added some commits May 24, 2018


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FranklinYinanDing commented Aug 31, 2018

@marcospereira Thanks for the quick fix! Would this security issue affect Play 2.4?


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gmethvin commented Aug 31, 2018

Technically the security issue was in akka-remote, which Play does not depend on, so it shouldn't make any difference unless you are using that library.

For affected versions see Specifically, the issue affects systems with Akka 2.5.0 - 2.5.15 that use Akka Remoting/Cluster with TLS and have configured the TLS random-number-generator to AES128CounterSecureRNG or AES256CounterSecureRNG.

@FranklinYinanDing to answer your question, this could not affect an application using Play 2.4, since Play 2.4 does not work with Akka 2.5.


Just make sure you note the breaking change in the next release announcement.


No strong feelings. LGTM.

@marcospereira marcospereira merged commit 2261350 into playframework:2.6.x Sep 4, 2018

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@marcospereira marcospereira deleted the marcospereira:update-akka-2.5.16 branch Sep 4, 2018

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