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Server warning on clean disconnection of client (hazelcast-client-new) #6035

em-chips opened this issue Aug 21, 2015 · 3 comments


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commented Aug 21, 2015

When the client disconnects normally, the server logs an info and a warning message containing the text This occurs on HC 3.5.1 at least.


Aug 21, 2015 2:05:13 PM com.hazelcast.nio.tcp.TcpIpConnection
INFO: []:5701 [dev] [3.5.1] Connection [Address[]:50771] lost. Reason:[Remote socket closed!]
Aug 21, 2015 2:05:13 PM com.hazelcast.nio.tcp.ReadHandler
WARNING: []:5701 [dev] [3.5.1] hz._hzInstance_1_dev.IO.thread-in-0 Closing socket to endpoint Address[]:50771, Remote socket closed!

Many log monitoring systems will be set up to trigger alerts on the presence of exception messages or warnings in the server logs. So here an ordered disconnection will trigger a false alarm.

Reproduce with

    public static void main(String[] args) {
        HazelcastInstance server = Hazelcast.newHazelcastInstance(new Config());
        HazelcastInstance client = HazelcastClient.newHazelcastClient(new ClientConfig());

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commented Aug 28, 2015

It does the same on 3.5.2

@enesakar enesakar removed the PENDING label Nov 2, 2015

@sancar sancar added this to the 3.7 milestone Nov 20, 2015

@pveentjer pveentjer self-assigned this May 3, 2016


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commented May 3, 2016

Thanks for reporting. I'll fix this one.


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commented Jan 11, 2017

We are using 3.6.2 and still seeing these in our logs. Is this issue closed?

01/11/2017 14:14:38,465 - INFO [hz._hzInstance_1_FB_API.IO.thread-in-0][][com.hazelcast.nio.tcp.TcpIpConnection] []:31201 [FB_API] [3.6.2] Connection [Address[]:59972] lost. Reason:[Remote socket closed!]
01/11/2017 14:14:38,466 - WARN [hz._hzInstance_1_FB_API.IO.thread-in-0][][com.hazelcast.nio.tcp.nonblocking.NonBlockingSocketReader] []:31201 [FB_API] [3.6.2] hz._hzInstance_1_FB_API.IO.thread-in-0 Closing socket to endpoint Address[]:59972, Remote socket closed!
01/11/2017 14:14:38,467 - INFO [hz._hzInstance_1_FB_API.event-3][][com.hazelcast.client.ClientEndpointManager] []:31201 [FB_API] [3.6.2] Destroying ClientEndpoint{conn=Connection [ -> /], endpoint=Address[]:59972, alive=false, type=JAVA_CLIENT, principal='ClientPrincipal{uuid='7181902f-8fe9-4065-b610-5a0e9c4ad212', ownerUuid='7ff02f81-c0e3-4094-a968-507c7df4df9f'}', firstConnection=true, authenticated=true}
01/11/2017 14:14:38,467 - INFO [hz._hzInstance_1_FB_API.event-3][][com.hazelcast.transaction.TransactionManagerService] []:31201 [FB_API] [3.6.2] Committing/rolling-back alive transactions of client, UUID: 7181902f-8fe9-4065-b610-5a0e9c4ad212
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