[MESOS-5114] Flags::parse does not handle empty string correctly.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.23.1, 0.24.1, 0.25.0, 0.26.0, 0.27.2, 0.28.0
• Fix Version/s: 1.0.0
• Component/s: stout
• Labels: mesosphere

Environment

CentOS 7.1

• Sprint: Mesosphere Sprint 32
• Story Points: 2
• Assignee: Michael Park
• Reporter: Cosmin Lehene
• Shepherd: Jie Yu
• Created: 04/Apr/16 21:01
• Updated: 31/May/16 02:11
• Resolved: 05/Apr/16 17:56

Description

A missing default for quorum size has generated the following master config

MESOS_WORK_DIR="/var/lib/mesos/master"
MESOS_ZK="zk://zk1:2181,zk2:2181,zk3:2181/mesos"
MESOS_QUORUM=

MESOS_PORT=5050
MESOS_CLUSTER="mesos"
MESOS_LOG_DIR="/var/log/mesos"
MESOS_LOGBUFSECS=1
MESOS_LOGGING_LEVEL="INFO"

This was causing each elected leader to attempt replica recovery.

E.g. group.cpp:700] Trying to get '/mesos/log_replicas/0000000012' in ZooKeeper

And eventually:
master.cpp:1458] Recovery failed: Failed to recover registrar: Failed to perform fetch within 1mins

Full log on one of the masters https://gist.github.com/clehene/09a9ddfe49b92a5deb4c1b421f63479e

All masters and zk nodes were reachable over the network.
Also once the quorum was configured the master recovery protocol finished gracefully.