Predix Edge Applications and Services Release Notes 2.4.0

Enhancements

This release has the following enhancements.
Cloud Gateway 1.4.0
  • Upgraded the container image distribution from Alpine 3.5 to Alpine 3.10
  • Significant performance improvements
  • Reduced verbosity of logs

Bug Fixes

This release contains the following bug fixes:
Cloud Gateway 1.4.0
  • Fixed performance degradation over time when using store-on-failure
  • Fixed issues that could cause stability problems
  • Fixed issues relating to shutdown

Known Issues

This release has the following known issues:
Duplicate Client IDs when Connecting to MQTT
Applications with no clientid configured may encounter an issue with duplicate client IDs when connecting to the MQTT broker resulting in the applications not working as expected. To avoid this issue, configure the cliendid field either in the PEAS applications or in custom applications when connecting to the broker.
Excessive Logging Depletes Memory
Applications that generate excessive logs can create conditions where Docker (dockerd) consumes a large amount of memory. If memory usage is of concern, configure applications to produce fewer logs.
EGD Failure During Power Cycle
The EGD application may fail to start or deploy if a previous attempt to start/deploy was interrupted by a power cycle. The workaround for this issue is to reboot the device before attempting to start/deploy the application.
OPC UA and Timeseries Output Format
Users of opcuapollflat blocks should not use the flat_to_timeseries block to generate timeseries output as this will result in the loss of tag-based timestamps because the flat_to_timeseries format uses the first timestamp it encounters for the entire tag list and discards the rest.
Instead, the output_format field should be set to time_series.
Cloud Gateway Performance
When the cloud connection is re-established and there is a large store buffer, cloud gateway performance will be slow for a couple of minutes.
Raw Modbus Data
Raw modbus data passed from an adapter into a raw modbus sink will fail with an error similar to:
  • Couldn't parse {"data":{"tagName":{"val":19}},"timestamp":1562096019014}: std::exception
Raspberry Pi
Cloud Gateway on Raspberry Pi is known to fail after running for an extended period of time, due to insufficient memory on the Raspberry Pi device.
Note: The Raspberry Pi image remains unchanged from the 2.1.0 release.