Change log level of the following message from ERROR to LOG.
Change log level of the following message from ERROR to LOG.

  ProcessFrontendResponse: failed to read kind from frontend. fronend abnormally exited

This means that pgpool detects unexpected EOF. This is not pgpool's
error.

treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres