[MESOS-6122] Mesos slave throws systemd errors even when passed a flag to disable systemd

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.1
• Fix Version/s: 1.0.2, 1.1.0
• Component/s: agent
• Assignee: Jie Yu
• Reporter: Gennady Feldman
• Created: 04/Sep/16 05:22
• Updated: 06/Sep/16 19:24
• Resolved: 06/Sep/16 19:24

Description

Seems like the code in slave/main.cpp is logically in the wrong order:
#ifdef _linux_
// Initialize systemd if it exists.
if (systemd::exists() && flags.systemd_enable_support) {

Lines 339-341: https://github.com/apache/mesos/blob/master/src/slave/main.cpp#L341

The flags should come first before the systemd::exists() check runs.Currently the systemd.exists() always runs and there's no way to disable that check from running in mesos-slave.