[MESOS-2962] Slave fails with Abort stacktrace when DNS cannot resolve hostname

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.22.1
• Fix Version/s: 0.23.0
• Component/s: agent
• Labels: mesosphere
• Target Version/s: 0.23.0
• Sprint: Mesosphere Sprint 13
• Story Points: 1
• Assignee: Marco Massenzio
• Reporter: Marco Massenzio
• Shepherd: Adam B
• Created: 30/Jun/15 18:36
• Updated: 26/Nov/18 12:20
• Resolved: 26/Nov/18 12:20

Description

If the DNS cannot resolve the hostname-to-IP for a slave node, we correctly return an Error object, but we then fail with a segfault.

This code adds a more user-friendly message and exits normally (with an EXIT_FAILURE code).

For example, forcing net::getIp() to always return an Error, now causes the slave to exit like this:

$ ./bin/mesos-slave.sh --master=10.10.1.121:5405
WARNING: Logging before InitGoogleLogging() is written to STDERR
E0630 11:31:45.777465 1944417024 process.cpp:899] Could not obtain the IP address for stratos.local; the DNS service may not be able to resolve it: >>> Marco was here!!!

$ echo $?
1

Issue Links

• relates to: MESOS-2636 Segfault in inline Try<IP> getIP(const std::string& hostname, int family)