[JENKINS-54041] EC2 Plugin no longer able to start build slaves - Jenkins Jira

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Type: Bug
Status: Resolved (View Workflow)
Priority: Blocker
Resolution: Fixed
Component/s: ec2-plugin
Labels:
None
Environment:
Jenkins 2.138.2
EC2 Plugin 1.40.1

Similar Issues:

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Description

When using the EC2-plugin 1.40.1 all of my builds stop working.

They are configured to only run on cloud slaves and the master node has no executors. They all queue up waiting for an executor, however all of the executors are offline and never start.

Downgrading to EC2 plugin 1.39 fixes the issue.

Log files:

Failed to load org.jenkinsci.plugins.github.pullrequest.extra.GitHubPRLabelUnblockQueueCondition$DescriptorImpl
java.lang.ClassNotFoundException: org.jenkinsci.plugins.blockqueuedjob.condition.BlockQueueCondition$BlockQueueConditionDescriptor
	at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:1374)
	at jenkins.util.AntClassLoader.findClass(AntClassLoader.java:1327)
	at jenkins.util.AntClassLoader.loadClass(AntClassLoader.java:1080)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
Caused: java.lang.NoClassDefFoundError: org/jenkinsci/plugins/blockqueuedjob/condition/BlockQueueCondition$BlockQueueConditionDescriptor
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
	at jenkins.util.AntClassLoader.defineClassFromData(AntClassLoader.java:1140)
	at hudson.ClassicPluginStrategy$AntClassLoader2.defineClassFromData(ClassicPluginStrategy.java:858)
	at jenkins.util.AntClassLoader.getClassFromStream(AntClassLoader.java:1311)
	at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:1364)
	at jenkins.util.AntClassLoader.findClass(AntClassLoader.java:1327)
	at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at jenkins.ClassLoaderReflectionToolkit.invoke(ClassLoaderReflectionToolkit.java:44)
	at jenkins.ClassLoaderReflectionToolkit._findClass(ClassLoaderReflectionToolkit.java:81)
	at hudson.PluginManager$UberClassLoader.findClass(PluginManager.java:1893)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at org.jvnet.hudson.annotation_indexer.Index$2$1.fetch(Index.java:99)
	at org.jvnet.hudson.annotation_indexer.Index$2$1.hasNext(Index.java:73)
	at 
.plugins.ec2.EC2Cloud provisionSlaveTemplate{ami='ami-xxx', labels='cloud-slave'}. Attempting to provision slave needed by excess workload of 1 units
Oct 12, 2018 7:52:06 AM INFO hudson.plugins.ec2.EC2Cloud getNewOrExistingAvailableSlaveSlaveTemplate{ami='ami-xxx', labels='cloud-slave'}. Cannot provision - no capacity for instances: 0
Oct 12, 2018 7:52:06 AM WARNING hudson.plugins.ec2.EC2Cloud provisionCan't raise nodes for SlaveTemplate{ami='ami-xxx', labels='cloud-slave'}
Oct 12, 2018 7:52:15 AM INFO hudson.plugins.ec2.EC2Cloud provisionSlaveTemplate{ami='ami-xxx', labels='cloud-slave'}. Attempting to provision slave needed by excess workload of 1 units
Oct 12, 2018 7:52:16 AM INFO hudson.plugins.ec2.EC2Cloud getNewOrExistingAvailableSlaveSlaveTemplate{ami='ami-xxx', labels='cloud-slave'}. Cannot provision - no capacity for instances: 0
Oct 12, 2018 7:52:16 AM WARNING hudson.plugins.ec2.EC2Cloud provisionCan't raise nodes for SlaveTemplate{ami='ami-xxx', labels='cloud-slave'}

Full stacktrace: https://pastebin.com/3UrfQ1vu

Attachments

Issue Links

duplicates

JENKINS-53920 After upgrade to 1.40 the slaves that are stopped via stopOnTerminate are not started again

Resolved

Activity

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Gil Shinar added a comment - 2019-08-11 11:26

I'm facing something similar. Sometimes instances are up and running and all the slaves are offline. Only removing the slaves from the jenkins or launching them again fixes that issue.

I saw that there might be a fix in version 1.45 but there's a warning message saying that upgrading to this version might result in configuration issues. Is that right?

I've tried to comment in ~~JENKINS-53952~~ but for some reason I cannot (browser freezes). No matter which browser I'm using.

Gil Shinar added a comment - 2019-08-11 11:26 I'm facing something similar. Sometimes instances are up and running and all the slaves are offline. Only removing the slaves from the jenkins or launching them again fixes that issue. I saw that there might be a fix in version 1.45 but there's a warning message saying that upgrading to this version might result in configuration issues. Is that right? I've tried to comment in JENKINS-53952 but for some reason I cannot (browser freezes). No matter which browser I'm using.

FABRIZIO MANFREDI added a comment - 2019-02-11 17:11

Fixed in 1.41 and 1.42

FABRIZIO MANFREDI added a comment - 2019-02-11 17:11 Fixed in 1.41 and 1.42

FABRIZIO MANFREDI added a comment - 2018-11-06 20:47

The problem is related to the CAP calculation that counts the stopped node as running. I am preparing the fix

FABRIZIO MANFREDI added a comment - 2018-11-06 20:47 The problem is related to the CAP calculation that counts the stopped node as running. I am preparing the fix

David Goate added a comment - 2018-10-30 08:51

Is there any other enhanced log level/appender I could enable or settings I could export which might help with this. I found a way to get builds running (manually log into the EC2 console and start the slaves which are in the stopped state and then once they are running go into the jenkins nodes section and start the agent)

When I manually start the agent, I do get a few warnings/errors, but ultimately it does attach and run and builds work.

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!


>ERROR: Unexpected error in launching an agent. This is probably a bug in Jenkins
java.lang.IllegalStateException: Already connected


Agent successfully connected and online
Oct 30, 2018 8:48:13 AM org.jenkinsci.remoting.util.AnonymousClassWarnings warn
WARNING: Attempt to (de-)serialize anonymous class org.jenkinsci.plugins.gitclient.Git$1; see: https://jenkins.io/redirect/serialization-of-anonymous-classes/

David Goate added a comment - 2018-10-30 08:51 Is there any other enhanced log level/appender I could enable or settings I could export which might help with this. I found a way to get builds running (manually log into the EC2 console and start the slaves which are in the stopped state and then once they are running go into the jenkins nodes section and start the agent) When I manually start the agent, I do get a few warnings/errors, but ultimately it does attach and run and builds work. @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! >ERROR: Unexpected error in launching an agent. This is probably a bug in Jenkins java.lang.IllegalStateException: Already connected Agent successfully connected and online Oct 30, 2018 8:48:13 AM org.jenkinsci.remoting.util.AnonymousClassWarnings warn WARNING: Attempt to (de-)serialize anonymous class org.jenkinsci.plugins.gitclient.Git$1; see: https: //jenkins.io/redirect/serialization-of-anonymous-classes/

David Goate added a comment - 2018-10-30 08:36

Further note on something I see in the logs which may be related/help debug the issue:

Oct 30, 2018 8:34:38 AM INFO hudson.plugins.ec2.EC2Cloud provisionSlaveTemplate{ami='ami-xxx', labels='cloud-slave'}. Attempting to provision slave needed by excess workload of 2 units
Oct 30, 2018 8:34:38 AM INFO hudson.plugins.ec2.EC2Cloud getNewOrExistingAvailableSlaveSlaveTemplate{ami='ami-xxx', labels='cloud-slave'}. Cannot provision - no capacity for instances: 0
Oct 30, 2018 8:34:38 AM WARNING hudson.plugins.ec2.EC2Cloud provisionCan't raise nodes for SlaveTemplate{ami='ami-xxx', labels='cloud-slave'}

David Goate added a comment - 2018-10-30 08:36 Further note on something I see in the logs which may be related/help debug the issue: Oct 30, 2018 8:34:38 AM INFO hudson.plugins.ec2.EC2Cloud provisionSlaveTemplate{ami= 'ami-xxx' , labels= 'cloud-slave' }. Attempting to provision slave needed by excess workload of 2 units Oct 30, 2018 8:34:38 AM INFO hudson.plugins.ec2.EC2Cloud getNewOrExistingAvailableSlaveSlaveTemplate{ami= 'ami-xxx' , labels= 'cloud-slave' }. Cannot provision - no capacity for instances: 0 Oct 30, 2018 8:34:38 AM WARNING hudson.plugins.ec2.EC2Cloud provisionCan 't raise nodes for SlaveTemplate{ami=' ami-xxx ', labels=' cloud-slave'}

David Goate added a comment - 2018-10-29 11:32 - edited

On latest version (1.41) I still get the warning:

WARNING: Failed to load org.jenkinsci.plugins.github.pullrequest.extra.GitHubPRLabelUnblockQueueCondition$DescriptorImpl
java.lang.NoClassDefFoundError: org/jenkinsci/plugins/blockqueuedjob/condition/BlockQueueCondition$BlockQueueConditionDescriptor

Reverting back to 1.39 now also gives:

Connecting to 10.1.1.90 on port 22, with timeout 10000.
Oct 29, 2018 11:19:39 AM WARNING org.jvnet.hudson.annotation_indexer.Index$2$1 fetchFailed to load org.jenkinsci.plugins.github.pullrequest.extra.GitHubPRLabelUnblockQueueCondition$DescriptorImpl
java.lang.ClassNotFoundException: org.jenkinsci.plugins.blockqueuedjob.condition.BlockQueueCondition$BlockQueueConditionDescriptor
	at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:1374)
	at jenkins.util.AntClassLoader.findClass(AntClassLoader.java:1327)
	at jenkins.util.AntClassLoader.loadClass(AntClassLoader.java:1080)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

So my previous "fix" for this (downgrading) no longer fixes the problem. I think after upgrading to 1.41 some configuration files might have changed as the plugin manager in Jenkins displayed a red warning saying that it might not be possible to downgrade.

Currently none of my Jenkins builds will run automatically.

David Goate added a comment - 2018-10-29 11:32 - edited On latest version (1.41) I still get the warning: WARNING: Failed to load org.jenkinsci.plugins.github.pullrequest.extra.GitHubPRLabelUnblockQueueCondition$DescriptorImpl java.lang.NoClassDefFoundError: org/jenkinsci/plugins/blockqueuedjob/condition/BlockQueueCondition$BlockQueueConditionDescriptor Reverting back to 1.39 now also gives: Connecting to 10.1.1.90 on port 22, with timeout 10000. Oct 29, 2018 11:19:39 AM WARNING org.jvnet.hudson.annotation_indexer.Index$2$1 fetchFailed to load org.jenkinsci.plugins.github.pullrequest.extra.GitHubPRLabelUnblockQueueCondition$DescriptorImpl java.lang.ClassNotFoundException: org.jenkinsci.plugins.blockqueuedjob.condition.BlockQueueCondition$BlockQueueConditionDescriptor at jenkins.util.AntClassLoader.findClassInComponents(AntClassLoader.java:1374) at jenkins.util.AntClassLoader.findClass(AntClassLoader.java:1327) at jenkins.util.AntClassLoader.loadClass(AntClassLoader.java:1080) at java.lang. ClassLoader .loadClass( ClassLoader .java:357) So my previous "fix" for this (downgrading) no longer fixes the problem. I think after upgrading to 1.41 some configuration files might have changed as the plugin manager in Jenkins displayed a red warning saying that it might not be possible to downgrade. Currently none of my Jenkins builds will run automatically.

David Goate added a comment - 2018-10-12 10:13

Excellent, thanks for that. Looking forward to the new release

David Goate added a comment - 2018-10-12 10:13 Excellent, thanks for that. Looking forward to the new release

FABRIZIO MANFREDI added a comment - 2018-10-12 08:14 - edited

Unfortunately the stop instance option is not working properly in the 1.40.x.

I am going to prepare the patch should be ready in the next days.

This ia duplicated of :

JENKINS-53920

FABRIZIO MANFREDI added a comment - 2018-10-12 08:14 - edited Unfortunately the stop instance option is not working properly in the 1.40.x. I am going to prepare the patch should be ready in the next days. This ia duplicated of : JENKINS-53920

People

Assignee:: FABRIZIO MANFREDI

Reporter:: David Goate

Votes:: 1 Vote for this issue

Watchers:: 9 Start watching this issue

Dates

Created:: 2018-10-12 07:57

Updated:: 2019-08-11 11:26

Resolved:: 2019-02-11 17:11