[JENKINS-61029] Swarm client not working anymore with Jenkins 2.220 - Jenkins Jira

Details

Type: Bug
Status: Resolved (View Workflow)
Priority: Blocker
Resolution: Fixed
Component/s: swarm-plugin
Labels:
- regression
Environment:
Jenkins 2.220 on Debian 10.3 x64 (jenkins.io Debian repo with Debian default JRE) with Swarm plug-in modules 3.17
swarm-client 3.17 on Windows 10, AdoptOpenJDK 8, specified master explicitly

Similar Issues:

Show
Released As:
3.18

Description

Slave

Exec:

java.exe -Xrs -jar "%BASE%\swarm-client-3.17.jar" -mode exclusive -name *** -labels *** -executors 1 -master [http://***] -username *** -password *** -fsroot "%BASE%" -deleteExistingClients -labelsFile "%BASE%\labels"

Log:

Feb 10, 2020 10:25:50 AM hudson.plugins.swarm.SwarmClient discoverFromMasterUrl
SEVERE: Failed to fetch slave info from Jenkins, HTTP response code: 500
Feb 10, 2020 10:25:50 AM hudson.plugins.swarm.Client run
SEVERE: RetryException occurred
hudson.plugins.swarm.RetryException: Failed to fetch slave info from Jenkins, HTTP response code: 500
	at hudson.plugins.swarm.SwarmClient.discoverFromMasterUrl(SwarmClient.java:248)
	at hudson.plugins.swarm.Client.run(Client.java:130)
	at hudson.plugins.swarm.Client.main(Client.java:104)Feb 10, 2020 10:25:50 AM hudson.plugins.swarm.Client run
INFO: Retrying in 10 seconds

Master

Log:

2020-02-10 09:50:32.698+0000 [id=276]   WARNING o.e.j.s.h.ContextHandler$Context#log: Error while serving http://***/plugin/swarm/slaveInfo
java.lang.NoClassDefFoundError: hudson/UDPBroadcastFragment
        at hudson.plugins.swarm.PluginImpl.getSwarmSecret(PluginImpl.java:262)
        at hudson.plugins.swarm.PluginImpl.doSlaveInfo(PluginImpl.java:272)
        at java.base/java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:710)
        at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:396)
Caused: java.lang.reflect.InvocationTargetException
        at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:400)
        at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:408)
        at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:212)
        at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:145)
        at org.kohsuke.stapler.MetaClass$11.doDispatch(MetaClass.java:535)
        at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
        at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:747)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:878)
        at org.kohsuke.stapler.MetaClass$4.doDispatch(MetaClass.java:280)
        at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
        at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:747)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:878)
        at org.kohsuke.stapler.Stapler.invoke(Stapler.java:676)
        at org.kohsuke.stapler.Stapler.service(Stapler.java:238)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
        at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:755)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1617)
[...]

The master is unable to load a class: UDPBroadcastFragment is now missing with jenkins 2.220, which got removed in jenkins core with f10d9f95fc ("~~JENKINS-60913~~ Remove network discovery services (#4460)").

Attachments

Issue Links

is caused by

JENKINS-60913 Remove network discovery services

Resolved

links to

jenkinsci/swarm-plugin#179

jenkinsci/swarm-plugin#182

Activity

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View 4 older comments

Jesse Glick added a comment - 2020-02-10 14:05

swarm-plugin could either remove support for automatic detection, or simply inline the UDP broadcast functionality if it is still useful in some contexts. I have no idea which is appropriate; a topic for the plugin maintainer. (basil perhaps?)

No, Jenkins core does not use semantic versioning.

Jesse Glick added a comment - 2020-02-10 14:05 swarm-plugin could either remove support for automatic detection, or simply inline the UDP broadcast functionality if it is still useful in some contexts. I have no idea which is appropriate; a topic for the plugin maintainer. ( basil perhaps?) No, Jenkins core does not use semantic versioning.

Basil Crow added a comment - 2020-02-10 18:05

I am not aware of anyone who is still using the support for automatic detection. Since it exposes us to security vulnerabilities, it seems better to remove support for automatic detection rather than to inline the UDP broadcast functionality.

Basil Crow added a comment - 2020-02-10 18:05 I am not aware of anyone who is still using the support for automatic detection. Since it exposes us to security vulnerabilities, it seems better to remove support for automatic detection rather than to inline the UDP broadcast functionality.

Basil Crow added a comment - 2020-02-13 16:27

Fixed by removing the auto-discovery feature in jenkinsci/swarm-plugin#179 and jenkinsci/swarm-plugin#182.

Basil Crow added a comment - 2020-02-13 16:27 Fixed by removing the auto-discovery feature in jenkinsci/swarm-plugin#179 and jenkinsci/swarm-plugin#182 .

Basil Crow added a comment - 2020-02-13 17:20

Released in Swarm 3.18.

Basil Crow added a comment - 2020-02-13 17:20 Released in Swarm 3.18.

Gabriel Ostrolucký added a comment - 2020-02-18 09:48

PSA: Don't forget to also update swarm jenkins plugin, not just docker-swarm binary on slaves.

Gabriel Ostrolucký added a comment - 2020-02-18 09:48 PSA: Don't forget to also update swarm jenkins plugin, not just docker-swarm binary on slaves.

Jenkins

Swarm client not working anymore with Jenkins 2.220