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If no Cometd handshake/connect is done, which mode does GMS use by default? Can GMS initiate a chat interaction in polling mode only, without cometD?

When the chat interaction is initiated, GMS uses both modes, cometd and polling.

  • If you already use a cometd connection for chat, you can poll the chat session at any time.
  • If you start a chat session using polling, you cannot use cometd to receive chat messages for the same session later.

In a GMS-clustered architecture, do all the GMS nodes communicate with a particular client across the _genesys cometd channel?

No. Only one GMS node of the cluster handles the cometd connection with a given client application at a time. For example, if the client application requests a cometd/handshake request, it will receive only one response from one GMS node; it will not receive multiple responses from each GMS node of the cluster.

Error when starting cqlsh

If you start bin/cqlsh and receive the following error:

Traceback (most recent call last):


LookupError: unknown encoding:

Change the line in bin/cqlsh from:

self.output_codec = codecs.lookup(encoding)


self.output_codec = codecs.lookup("UTF-8")

Endpoint Collision: External Cassandra (on start message) A node with address <IP address> already exists, cancelling join

See the Cassandra documentation for replacing a dead seed node.

Error in GMS logs: WARNING: Failed to check connection: java.net.SocketException: Too many open files

On RHEL Sysems, change the system limits from 1024 to 10240 in /etc/security/limits.d/90-nproc.conf, and then start a new shell for these changes to take effect:

soft nproc 10240

See the Cassandra documentation for recommended settings.

GMS does not install / start on Linux 64

When installing GMS IPs on a 64-bit Linux host, the compatibility packages must be installed on the Linux host. The compatibility packages are available with the OS distribution media.

When several GMS nodes are in a cluster, the following logs are on all GMSs:

New node has joined the ring:

Node has been removed from the ring:

New node has joined the ring:

Node has been removed from the ring:

New node has joined the ring:

Node has been removed from the ring:

New node has joined the ring:

Node has been removed from the ring:

Synchronize the clock of all GMS nodes. On Windows, use following command:

net time \\<ComputerName> /set /yes

Where \\<ComputerName> specifies the name of a server you want to check or with which you want to synchronize.

I cannot update GMS configuration through the GMS Service Management UI, and the following error is in the GMS logs:


Insufficient permissions to perform this operation com.genesyslab.platform.applicationblocks.com.ConfigServerException: Insufficient permissions to perform this operation (ErrorType=CFGNoPermission, ObjectType=CFGApplication, ObjectProperty=CFGDBID)

Make sure that all GMS applications have the user assigned in the Security tab, in Configuration Manager. Or, in Genesys Administrator, browse the User for Log On Account in the Server Information section of your application.

This page was last edited on April 13, 2017, at 13:01.


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