This repo includes a test-case for what may be a bug in Heka, where Heka consumes CPU while it has nothing to do.

Running the test-case requires a Git checkout of Heka, built with the instructions provided in http://hekad.readthedocs.org/en/latest/installing.html.

Running the test-case:

make HEKA_DIR=/path/to/heka/checkout/dir

make will run hekad, which will create an rsyslog decoder for each log file located in the logs directory. The logs directory is created by make and includes empty log files.

Even though the log files are empty hekad will still consume CPU, about 25% on my 8-core laptop. The percentage of CPU is related to the number of log files/decoders.