Re: [support] Druapal server fatal error: "MySQL server has gone away", but DB server is still up & accessible. Help troubleshooting?

SOLVED. It's a bug in MariaDB. https://mariadb.atlassian.net/browse/MDEV-6340?focusedCommentId=52089&page=c... It mainfests when GCC 4.9 is used. The issue's ID'd at "Operational Notification -- Changes in gcc Code Optimization Can Cause a Crash in BIND" https://kb.isc.org/article/AA-01167 The workaround is to add "CFLAGS=-fno-delete-null-pointer-checks" to gcc compile options Here, with MariaDB 10.0.12 / ReleaseBuild built with GCC 4.9 + CFLAGS=-fno-delete-null-pointer-checks, drush site-install of Drupal 7.28 exec with no errors, and `drush *` works on existing site with no errors.