The SAS Event Stream Processing Engine (ESP) Stream Viewer is unable to connect to the event stream processing publish/subscribe HTTP provider. The ESP Stream Viewer shows the host name with strikeout and with red text:

This can occur if there is no listener on the port that is specified in the URL or if the event stream processing engine is not listening for HTTP publish/subscribe requests on the port. If the port selected is the publish/subscribe port, the ESP engine issues an error message: To successfully connect, the HTTP publish/subscribe port of the ESP engine must be specified as the URL for the ESP Stream Viewer. The HTTP publish/subscribe port can be configured with:

• The -http-pubsub port option when starting the dfesp_xml_server.
• The -h [pubsub http port] on the dfESPengine::initialize() for a C++ application.
• The <http-pubsub-server port='[http pubsub port]'/> element of the <http-servers> element of the XML model.

Once successfully connected to the HTTP publish/subscribe port, the ESP Stream Viewer shows the models that are defined to the engine. For example, if the XML modeling server is started as: the URL for the ESP Stream Viewer Server is http://localhost:61002 and the ESP Stream Viewer successfully connects:

Operating System and Release Information

Product Family	Product	System	Product Release		SAS Release
			Reported	Fixed*	Reported	Fixed*
SAS System	SAS Event Stream Processing Engine	Microsoft® Windows® for x64	2.3
		Linux for x64	2.3

* For software releases that are not yet generally available, the Fixed Release is the software release in which the problem is planned to be fixed.

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Users of the SAS^® ESP Stream Viewer are unable to connect to the ESP publish/subscribe HTTP provider. The host name is displayed in strikeout and red text. The ESP engine might issue error message dfESPpubsubServer::handle_read_magic_number(): Magic number mismatch

Type:	Usage Note
Priority:

Date Modified:	2015-06-29 10:38:22
Date Created:	2015-01-14 15:43:29