com.amazon.jenkins.ec2fleet

Class EC2FleetAutoResubmitComputerLauncher

java.lang.Object

hudson.model.AbstractDescribableImpl<hudson.slaves.ComputerLauncher>

hudson.slaves.ComputerLauncher

hudson.slaves.DelegatingComputerLauncher

com.amazon.jenkins.ec2fleet.EC2FleetAutoResubmitComputerLauncher

All Implemented Interfaces:

hudson.ExtensionPoint, hudson.model.Describable<hudson.slaves.ComputerLauncher>

@ThreadSafe
public class EC2FleetAutoResubmitComputerLauncher
extends hudson.slaves.DelegatingComputerLauncher

This is wrapper for ComputerLauncher to get notification when slave was disconnected and automatically resubmit Queue.Task if reason is unexpected termination which usually means EC2 instance was interrupted.

This is optional feature, it's enabled by default, but could be disabled by EC2FleetCloud.isDisableTaskResubmit()

See Also:

EC2FleetNode, EC2FleetNodeComputer

Nested Class Summary

Nested classes/interfaces inherited from class hudson.slaves.DelegatingComputerLauncher

hudson.slaves.DelegatingComputerLauncher.DescriptorImpl

Nested classes/interfaces inherited from interface hudson.ExtensionPoint

hudson.ExtensionPoint.LegacyInstancesAreScopedToHudson

Field Summary

Fields inherited from class hudson.slaves.DelegatingComputerLauncher

launcher

Fields inherited from class hudson.slaves.ComputerLauncher

LIST

Constructor Summary

Constructors

Constructor and Description
EC2FleetAutoResubmitComputerLauncher(hudson.slaves.ComputerLauncher launcher)

Method Summary

Modifier and Type	Method and Description
void	afterDisconnect(hudson.slaves.SlaveComputer computer, hudson.model.TaskListener listener) ComputerLauncher.afterDisconnect(SlaveComputer, TaskListener)

Methods inherited from class hudson.slaves.DelegatingComputerLauncher

beforeDisconnect, getLauncher, launch

Methods inherited from class hudson.slaves.ComputerLauncher

afterDisconnect, beforeDisconnect, checkJavaVersion, isLaunchSupported, launch

Methods inherited from class hudson.model.AbstractDescribableImpl

getDescriptor

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EC2FleetAutoResubmitComputerLauncher

public EC2FleetAutoResubmitComputerLauncher(hudson.slaves.ComputerLauncher launcher)

Method Detail

afterDisconnect

public void afterDisconnect(hudson.slaves.SlaveComputer computer,
                            hudson.model.TaskListener listener)

ComputerLauncher.afterDisconnect(SlaveComputer, TaskListener)

EC2 Fleet plugin overrides this method to detect jobs which were failed because of EC2 instance was terminated/stopped. It could be manual stop or because of Spot marked. In all cases as soon as job aborted because of broken connection and slave is offline it will try to resubmit aborted job back to the queue, so user doesn't need to do that manually and another slave could take it.

Implementation details

There is no official recommendation about way how to resubmit job according to https://issues.jenkins-ci.org/browse/JENKINS-49707 moreover some of Jenkins code says it impossible.

method checks Computer.getOfflineCause() for disconnect because of EC2 instance termination it returns result = {OfflineCause$ChannelTermination@13708} "Connection was broken: java.io.IOException: Unexpected termination of the channel\n\tat hudson.remoting.SynchronousCommandTransport$ReaderThread... cause = {IOException@13721} "java.io.IOException: Unexpected termination of the channel" timestamp = 1561067177837

Overrides:

afterDisconnect in class hudson.slaves.DelegatingComputerLauncher

Parameters:

computer - computer

listener - listener