Hi, Recently we've been setting up some testing of our application when running as a Cluster. We start 1 actor system on port 2551 as part of our test suite.
As part of this individual test we then start further servers on port 2552 and 2553. This works great - we have a counting actor that shows the cluster has received MemberUp for all 3 nodes and our test succeeds. We thought we'd take it to the next level - and use the IntelliJ ide's feature to run our test suite 100 times to check this wasn't a fluke and when we did so we spotted some peculiar behaviour. For context - Actor System on port 2551 never gets stopped but the actor systems on port 2552/2553 get started during the individual test and stopped at its end. These are always brand new instances of ActorSystem.create(....), we are not simply stopping/starting these servers. After about 30 runs of this test, during shutdown of 2552/2553 its very likely they both become quarantined by 2551. (Not a surprise). What is a surprise - is that when we re-create a brand new ActorSystem on 2552/2553 it is seen as being the same original server (hostname,port,uid) - and quarantine behaviour kicks in (IE No-one will talk to it and the test fails all further runs). >From this piece of documentation: http://doc.akka.io/docs/akka/2.4.2/common/cluster.html "The identifier for each node is a hostname:port:uid tuple" So obviously the hostname and port remain the same when we shutdown and restart - but how is the 'uid' generated? Is this something based on the JVM/OS Thread things are being created in - or is this user configurable - since it seems our problem is that when creating new actor systems we are getting uid's which basically aren't very unique. Firstly - is there a way we can see the ActorSystems uid to confirm this is the case, and finally is there some way we can specify the uid used (to enforce uniqueness)? Thanks kindly, Daniel Stoner -- Daniel Stoner | Senior Software Engineer UtopiaIT | Ocado Technology [email protected] | Ext 7969 | www.ocadotechnology.com -- Notice: This email is confidential and may contain copyright material of members of the Ocado Group. Opinions and views expressed in this message may not necessarily reflect the opinions and views of the members of the Ocado Group. If you are not the intended recipient, please notify us immediately and delete all copies of this message. Please note that it is your responsibility to scan this message for viruses. Fetch and Sizzle are trading names of Speciality Stores Limited, a member of the Ocado Group. References to the “Ocado Group” are to Ocado Group plc (registered in England and Wales with number 7098618) and its subsidiary undertakings (as that expression is defined in the Companies Act 2006) from time to time. The registered office of Ocado Group plc is Titan Court, 3 Bishops Square, Hatfield Business Park, Hatfield, Herts. AL10 9NE. -- >>>>>>>>>> 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 --- You received this message because you are subscribed to the Google Groups "Akka User List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
