Open connection

Procedure

Qlik Sense performs the following procedure:

Open a socket to the Qlik Sense Engine Service (QES). This happens every time a user opens an app in Qlik Sense.

In case of success, log entries are written in the following files throughout the procedure:

Web socket connection could not be opened error
Description	Command=Open connection;Result=400;ResultText=Error: Web socket connection could not be opened
Message	Connection '<ID of connection>' has been transferred to a streaming state to send a single error message
Action	Proceed as follows: Check if the QES is up and running. If not, start the QES. Check that it is possible to connect to the QES.

Web exception: Protocol error: Response stream exists error
Description	Command=Open connection;Result=400;ResultText=<different from zero>;ResultText=Error: <error message>
Message	Web exception: Protocol error: Response stream exists. Remote endpoint '{0}' + various exception message
Action	Check the following: That the QES is up and running. That you can connect to the QES on port 4747 locally on the server.

Web exception: Protocol error: No response stream exists error
Description	Command=Open connection;Result=400;ResultText=<different from zero>;ResultText=Error: <error message>
Message	Web exception: Protocol error: No response stream exists when contacting '{0}' ' + various exception message
Action	Check the following: That the QES is up and running. That you can connect to the QES on port 4747 locally on the server.

Web exception when contacting service uri error
Description	Command=Open connection;Result=400;ResultText=<different from zero>;ResultText=Error: <error message>
Message	Web exception when contacting service uri {0} ' + various exception message
Action	Check that service at URI is available.

Connection has been transferred to a streaming state to send a single error message error
Description	Command=Open connection;Result=400;ResultText=<different from zero>;ResultText=Error: <error message>
Message	Connection '{0}' has been transferred to a streaming state to send a single error message + various exception message
Action	Check the following: That the QES is up and running. That you can connect to the QES on port 4747 locally on the server.

Web socket connection could not be opened error
Description	Command=Open connection;Result=400;ResultText=<different from zero>;ResultText=Error: <error message>
Message	Web socket connection could not be opened
Action	Check the following: That the QES is up and running. That you can connect to the QES on port 4747 locally on the server.

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