Hot Fix 5.2.1 for SAS Event Stream Processing addresses the following issues:

• Allows the index to be set to pi_EMPTY in the Calculate window. 
• Allows produces-only-inserts to be set in the Calculate window.
• Updates several JAR packages to reduce security exposures as reported by Blackduck scans.
• Fixes an issue consuming from multiple partitions for Kafka connector/adapter/client transport.
• Modifies the Kafka adapter configured with Kafka transport to not join the espmeta consumer group, in order to fix an intermittent time-out when getting window metadata.
• Enables the DFESP_XML_MIGRATE tool to now preserve CDATA tags in XML models.
• Updates the HTTP-SERVER element of a model specification to reflect that the ESP server uses a single HTTP port. Removes the HTTP-ADMIN-SERVER and HTTP-PUBSUB-SERVER elements.
• Fixes a memory leak in the URL and WebSocket connectors.
• Updates the Java adapters to correctly use the DFESP_CONFIG and DFESP_CONFIG_TAIL environment variables.
• Enables subscriber connectors to now finish when using the -EXIT parameter on the DFESP_XML_SERVER command line.
• Enhances the UVC connector/adapter to work with v4l2loopback, a virtual v4l2 device that allocates less than 16 frame buffers in kernel.
• Enhances the OPC-UA connector/adapter to support node IDs containing commas, by using the new OPCUANODEIDDELIMITER optional parameter.
• Updates the Streamviewer to enhance the user experience.
• Adds an optional Rabbit MQ connector/adapter RMQHEARTBEAT parameter to define the heartbeat interval. The subscriber thread sends heartbeat frames at the configured interval.
• Removes the recommender exclusion from the /SASESP/algorithms/score REST interface
• Enhances the Geofence window application programming interface (API) to support projection and distance calculations along polylines geometries.
• Enhances the JSON parser to allow copying of JSON values of type=real that contain an integer to an ESP timestamp or datetime field.

Click the Hot Fix tab in this note to access the hot fix for this issue.

Operating System and Release Information

An update for this issue is available for SAS Viya 3.4. For instructions on how to access and apply software updates, see the Updating Your SAS Viya software section in the SAS Viya 3.4 for Windows Deployment Guide at

An update for this issue is available for SAS Event Stream Processing Studio 5.2. For instructions on how to access and apply this software update see the SAS Event Stream Processing 5.2 Deployment Guide links on