For us, the issue was ultimately a symptom of the problem referenced here:
https://groups.google.com/forum/#!topic/akka-user/4lBUX7N7W6k

Our cluster was in a broken state and persistent actors were unable to
recover.

Patrik, if I read correctly this issue is resolved in 2.4? If so, would
still like me to file a ticket Roland?

On Thu, Jun 18, 2015 at 3:12 AM, Patrik Nordwall <[email protected]>
wrote:

>
>
> On Thu, Jun 18, 2015 at 11:46 AM, Brice Figureau <
> [email protected]> wrote:
>
>> Hi,
>>
>> I'm also seeing this log message logged on a very unloaded cluster, on
>> akka 2.3.11.
>>
>> On Wed, 2015-06-17 at 13:31 +0200, Patrik Nordwall wrote:
>> > I'm interested in where all those resolve calls come from, because it
>> > could be a performance issue. It could be deserialization of ActorRef.
>>
>> It's possible, but it is hard to confirm, since the log line doesn't
>> give us a stacktrace to analyze.
>>
>> It seems to me that it appeared when I started using ClusterSingleton
>> and ClusterSharding (but I can be wrong). Most of the references of this
>> log line I see in my logs are for singletons endpoint or sharding
>> entries.
>>
>> It looks like it happens approximately at the same time a persistent
>> actor recovers (which would mean you found the real issue).
>>
>
> Yes, that matches my understanding, and that will be solved in 2.4
> /Patrik
>
>
>>
>> > Yesterday I removed storage of the sender ActorRef in persistent
>> > events, which typically would result in such things when persistent
>> > actors replay the event log.
>>
>> Yes, that would make sense.
>>
>> > Does /user/token-mgr-proxy/TokenManager send messages to a persistent
>> > actor, or do you know what is causing the failing resolve?
>>
>> I'll let the OP answer this question.
>>
>> --
>> Brice Figureau <[email protected]>
>>
>> --
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>
>
> --
>
> Patrik Nordwall
> Typesafe <http://typesafe.com/> -  Reactive apps on the JVM
> Twitter: @patriknw
>
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-- 
>>>>>>>>>>      Read the docs: http://akka.io/docs/
>>>>>>>>>>      Check the FAQ: 
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>>      Search the archives: https://groups.google.com/group/akka-user
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