IBM Streams 4.2.1
Stream processing applications
Use these solutions to resolve the problems that you might encounter when you develop streams processing applications.
- Problem launching graphical user interface (GUI) applications
The Domain Manager, Streams Console, Streams Studio, Commodity Purchasing sample application, or any other IBM Streams application that requires an X Window System cannot be launched. - Processing element startup problems
If the processing elements fail to start after you submit an application job, you might have to increase the value of the hc.pecStartTimeout property for the domain controller service. If you use IBM Streams Version 2.0.0.4 or later and a config wrapper exists on any of the operators in the application, ensure that the value of the DISPLAY environment variable is valid. - Getting rid of the Uncrustify source code formatter warning message
To ensure that your C++ code is indented and formatted correctly when you generate code by using the sc command or Streams Studio, you can optionally install and use the Uncrustify source code formatter. If you do not install this formatter, a warning message is displayed when you compile your code and use the code beautification option. - Conflicts requesting ports from the local port range
An error is generated when the TCPSink, TCPSource, UDPSource, or UDPSink operator of an application specifies the port that IBM Streams is already using, and the application is launched.
Parent topic: IBM Streams problems and solutions