[JENKINS-66335] Failed to create a swam agent on jenkins. response code 411

Type: Bug
Resolution: Fixed
Priority: Minor
Component/s: swarm-plugin
Labels:
None
Environment:
Jenkins 2.289.2
swam-plugin Version: 3.27
swarm-client version: 3.27

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Released As:
3.28

After updating jenkins I see this error message when trying to run the swarm-client on a slave machine.

Aug 09, 2021 11:01:03 AM hudson.plugins.swarm.Client logArguments
 INFO: Client invoked with: -name slave-abc -password ***** -retry 1 -url http://jenkins.sab.local -username ***** 
 Aug 09, 2021 11:01:03 AM hudson.plugins.swarm.Client run
 INFO: Connecting to Jenkins controller
 Aug 09, 2021 11:01:03 AM hudson.plugins.swarm.Client run
 INFO: Attempting to connect to http://jenkins.sab.local/
 Aug 09, 2021 11:01:04 AM hudson.plugins.swarm.Client run
 SEVERE: An error occurred
 hudson.plugins.swarm.RetryException: Failed to create a Swarm agent on Jenkins. Response code: 411
 <?xml version="1.0" encoding="iso-8859-1"?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
 <head>
 <title>411 Length Required</title>
 </head>
 <body>
 <h1>411 Length Required</h1>
 </body>
 </html>
at hudson.plugins.swarm.SwarmClient.createSwarmAgent(SwarmClient.java:457)
 at hudson.plugins.swarm.Client.run(Client.java:204)
 at hudson.plugins.swarm.Client.main(Client.java:73)
Aug 09, 2021 11:01:04 AM hudson.plugins.swarm.Client run
 SEVERE: Retry limit reached, exiting...

links to

jenkinsci/swarm-plugin#360

Heiko Thiery added a comment - 2021-08-11 06:17

Version swarm-client-3.23.jar of the client seems to work well. All newer versions show the error above.

Heiko Thiery added a comment - 2021-08-11 06:17 Version swarm-client-3.23.jar of the client seems to work well. All newer versions show the error above.

Basil Crow added a comment - 2021-08-14 16:41

Cannot reproduce the problem with a fresh installation of Jenkins 2.289.2 and Swarm 3.27 (plugin and client). Please provide a list of steps to reproduce the problem from scratch.

Basil Crow added a comment - 2021-08-14 16:41 Cannot reproduce the problem with a fresh installation of Jenkins 2.289.2 and Swarm 3.27 (plugin and client). Please provide a list of steps to reproduce the problem from scratch.

Gavin Williams added a comment - 2021-08-24 20:02 - edited

We've hit this issue aswell when deploying a Jenkins controller on Google Kubernetes Engine (GKE) and fronting it with a Google HTTPS Load Balancer using the `gce` Ingress class.

I've opened https://github.com/jenkinsci/swarm-plugin/pull/360 to specify an empty body for the request in order for the `Content-Length` header to be set.

Gavin Williams added a comment - 2021-08-24 20:02 - edited We've hit this issue aswell when deploying a Jenkins controller on Google Kubernetes Engine (GKE) and fronting it with a Google HTTPS Load Balancer using the `gce` Ingress class. I've opened https://github.com/jenkinsci/swarm-plugin/pull/360 to specify an empty body for the request in order for the `Content-Length` header to be set.

Basil Crow added a comment - 2021-08-25 14:47

PR #360 has produced a build for testing here: https://ci.jenkins.io/job/Plugins/job/swarm-plugin/job/PR-360/6/artifact/client/target/swarm-client.jar

fatmcgav and hthiery, can you please download this build, test it, and confirm that this build fixes the problem for both of you?

Basil Crow added a comment - 2021-08-25 14:47 PR #360 has produced a build for testing here: https://ci.jenkins.io/job/Plugins/job/swarm-plugin/job/PR-360/6/artifact/client/target/swarm-client.jar fatmcgav and hthiery , can you please download this build, test it, and confirm that this build fixes the problem for both of you?

Gavin Williams added a comment - 2021-08-25 15:18 - edited

I can confirm that the build jar works as expected:

❯ java -jar swarm-client.jar -description "fatmcgav swarm test" -disableClientsUniqueId -executors 1 -fsroot jenkins -retry 6 -maxRetryInterval 160 -retryBackOffStrategy exponential -mode exclusive -username local-swarm -passwordFile swarm-password.txt -deleteExistingClients -name fatmcgav-swarm-test -master https://*** -username local-swarm -webSocket -labels swarm -labels x86_64
Aug 25, 2021 4:15:00 PM hudson.plugins.swarm.Client logArguments
INFO: Client invoked with: -deleteExistingClients true -description fatmcgav swarm test -disableClientsUniqueId true -executors 1 -fsroot jenkins -labels [swarm, x86_64] -maxRetryInterval 160 -mode exclusive -name fatmcgav-swarm-test -passwordFile ***** -retry 6 -retryBackOffStrategy EXPONENTIAL -url https://*** -username ***** -webSocket true
Aug 25, 2021 4:15:00 PM hudson.plugins.swarm.Client run
INFO: Connecting to Jenkins controller
Aug 25, 2021 4:15:00 PM hudson.plugins.swarm.Client run
INFO: Attempting to connect to https://***
Aug 25, 2021 4:15:01 PM hudson.remoting.jnlp.Main createEngine
INFO: Setting up agent: fatmcgav-swarm-test
Aug 25, 2021 4:15:01 PM hudson.remoting.jnlp.Main$CuiListener <init>
INFO: Jenkins agent is running in headless mode.
Aug 25, 2021 4:15:01 PM hudson.remoting.Engine startEngine
INFO: Using Remoting version: 4.10
Aug 25, 2021 4:15:01 PM org.jenkinsci.remoting.engine.WorkDirManager initializeWorkDir
INFO: Using jenkins/remoting as a remoting work directory
Aug 25, 2021 4:15:01 PM org.jenkinsci.remoting.engine.WorkDirManager setupLogging
INFO: Both error and output logs will be printed to jenkins/remoting
Aug 25, 2021 4:15:01 PM hudson.remoting.jnlp.Main$CuiListener status
INFO: WebSocket connection open
Aug 25, 2021 4:15:01 PM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connected

Gavin Williams added a comment - 2021-08-25 15:18 - edited I can confirm that the build jar works as expected: ❯ java -jar swarm-client.jar -description "fatmcgav swarm test" -disableClientsUniqueId -executors 1 -fsroot jenkins -retry 6 -maxRetryInterval 160 -retryBackOffStrategy exponential -mode exclusive -username local-swarm -passwordFile swarm-password.txt -deleteExistingClients -name fatmcgav-swarm-test -master https: //*** -username local-swarm -webSocket -labels swarm -labels x86_64 Aug 25, 2021 4:15:00 PM hudson.plugins.swarm.Client logArguments INFO: Client invoked with: -deleteExistingClients true -description fatmcgav swarm test -disableClientsUniqueId true -executors 1 -fsroot jenkins -labels [swarm, x86_64] -maxRetryInterval 160 -mode exclusive -name fatmcgav-swarm-test -passwordFile ***** -retry 6 -retryBackOffStrategy EXPONENTIAL -url https: //*** -username ***** -webSocket true Aug 25, 2021 4:15:00 PM hudson.plugins.swarm.Client run INFO: Connecting to Jenkins controller Aug 25, 2021 4:15:00 PM hudson.plugins.swarm.Client run INFO: Attempting to connect to https: //*** Aug 25, 2021 4:15:01 PM hudson.remoting.jnlp.Main createEngine INFO: Setting up agent: fatmcgav-swarm-test Aug 25, 2021 4:15:01 PM hudson.remoting.jnlp.Main$CuiListener <init> INFO: Jenkins agent is running in headless mode. Aug 25, 2021 4:15:01 PM hudson.remoting.Engine startEngine INFO: Using Remoting version: 4.10 Aug 25, 2021 4:15:01 PM org.jenkinsci.remoting.engine.WorkDirManager initializeWorkDir INFO: Using jenkins/remoting as a remoting work directory Aug 25, 2021 4:15:01 PM org.jenkinsci.remoting.engine.WorkDirManager setupLogging INFO: Both error and output logs will be printed to jenkins/remoting Aug 25, 2021 4:15:01 PM hudson.remoting.jnlp.Main$CuiListener status INFO: WebSocket connection open Aug 25, 2021 4:15:01 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Connected

Gavin Williams added a comment - 2021-08-25 15:20

Logs from `3.27` jar for comparison:

❯ java -jar swarm-client-3.27.jar -description "fatmcgav swarm test" -disableClientsUniqueId -executors 1 -fsroot jenkins -retry 6 -maxRetryInterval 160 -retryBackOffStrategy exponential -mode exclusive -username local-swarm -passwordFile swarm-password.txt -deleteExistingClients -name fatmcgav-swarm-test -master https://*** -username local-swarm -webSocket -labels swarm -labels x86_64
Aug 25, 2021 4:18:28 PM hudson.plugins.swarm.Client logArguments
INFO: Client invoked with: -deleteExistingClients true -description fatmcgav swarm test -disableClientsUniqueId true -executors 1 -fsroot jenkins -labels [swarm, x86_64] -maxRetryInterval 160 -mode exclusive -name fatmcgav-swarm-test -passwordFile ***** -retry 6 -retryBackOffStrategy EXPONENTIAL -url https://*** -username ***** -webSocket true
Aug 25, 2021 4:18:28 PM hudson.plugins.swarm.Client run
INFO: Connecting to Jenkins controller
Aug 25, 2021 4:18:28 PM hudson.plugins.swarm.Client run
INFO: Attempting to connect to https://***
Aug 25, 2021 4:18:29 PM hudson.plugins.swarm.Client run
SEVERE: An error occurred
hudson.plugins.swarm.RetryException: Failed to create a Swarm agent on Jenkins. Response code: 411
<!DOCTYPE html>
<html lang=en>
  <meta charset=utf-8>
  <meta name=viewport content="initial-scale=1, minimum-scale=1, width=device-width">
  <title>Error 411 (Length Required)!!1</title>
  <style>
    *{margin:0;padding:0}html,code{font:15px/22px arial,sans-serif}html{background:#fff;color:#222;padding:15px}body{margin:7% auto 0;max-width:390px;min-height:180px;padding:30px 0 15px}* > body{background:url(//www.google.com/images/errors/robot.png) 100% 5px no-repeat;padding-right:205px}p{margin:11px 0 22px;overflow:hidden}ins{color:#777;text-decoration:none}a img{border:0}@media screen and (max-width:772px){body{background:none;margin-top:0;max-width:none;padding-right:0}}#logo{background:url(//www.google.com/images/branding/googlelogo/1x/googlelogo_color_150x54dp.png) no-repeat;margin-left:-5px}@media only screen and (min-resolution:192dpi){#logo{background:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) no-repeat 0% 0%/100% 100%;-moz-border-image:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) 0}}@media only screen and (-webkit-min-device-pixel-ratio:2){#logo{background:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) no-repeat;-webkit-background-size:100% 100%}}#logo{display:inline-block;height:54px;width:150px}
  </style>
  <a href=//www.google.com/><span id=logo aria-label=Google></span></a>
  <p><b>411.</b> <ins>That’s an error.</ins>
  <p>POST requests require a <code>Content-length</code> header.  <ins>That’s all we know.</ins>        at hudson.plugins.swarm.SwarmClient.createSwarmAgent(SwarmClient.java:457)
        at hudson.plugins.swarm.Client.run(Client.java:204)
        at hudson.plugins.swarm.Client.main(Client.java:73)Aug 25, 2021 4:18:29 PM hudson.plugins.swarm.Client run
WARNING: Remaining retries: 5
Aug 25, 2021 4:18:29 PM hudson.plugins.swarm.Client run
INFO: Retrying in 10 seconds

Gavin Williams added a comment - 2021-08-25 15:20 Logs from `3.27` jar for comparison: ❯ java -jar swarm-client-3.27.jar -description "fatmcgav swarm test" -disableClientsUniqueId -executors 1 -fsroot jenkins -retry 6 -maxRetryInterval 160 -retryBackOffStrategy exponential -mode exclusive -username local-swarm -passwordFile swarm-password.txt -deleteExistingClients -name fatmcgav-swarm-test -master https: //*** -username local-swarm -webSocket -labels swarm -labels x86_64 Aug 25, 2021 4:18:28 PM hudson.plugins.swarm.Client logArguments INFO: Client invoked with: -deleteExistingClients true -description fatmcgav swarm test -disableClientsUniqueId true -executors 1 -fsroot jenkins -labels [swarm, x86_64] -maxRetryInterval 160 -mode exclusive -name fatmcgav-swarm-test -passwordFile ***** -retry 6 -retryBackOffStrategy EXPONENTIAL -url https: //*** -username ***** -webSocket true Aug 25, 2021 4:18:28 PM hudson.plugins.swarm.Client run INFO: Connecting to Jenkins controller Aug 25, 2021 4:18:28 PM hudson.plugins.swarm.Client run INFO: Attempting to connect to https: //*** Aug 25, 2021 4:18:29 PM hudson.plugins.swarm.Client run SEVERE: An error occurred hudson.plugins.swarm.RetryException: Failed to create a Swarm agent on Jenkins. Response code: 411 <!DOCTYPE html> <html lang=en> <meta charset=utf-8> <meta name=viewport content= "initial-scale=1, minimum-scale=1, width=device-width" > <title>Error 411 (Length Required)!!1</title> <style> *{margin:0;padding:0}html,code{font:15px/22px arial,sans-serif}html{background:#fff;color:#222;padding:15px}body{margin:7% auto 0;max-width:390px;min-height:180px;padding:30px 0 15px}* > body{background:url( //www.google.com/images/errors/robot.png) 100% 5px no-repeat;padding-right:205px}p{margin:11px 0 22px;overflow:hidden}ins{color:#777;text-decoration:none}a img{border:0}@media screen and (max-width:772px){body{background:none;margin-top:0;max-width:none;padding-right:0}}#logo{background:url(//www.google.com/images/branding/googlelogo/1x/googlelogo_color_150x54dp.png) no-repeat;margin-left:-5px}@media only screen and (min-resolution:192dpi){#logo{background:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) no-repeat 0% 0%/100% 100%;-moz-border-image:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) 0}}@media only screen and (-webkit-min-device-pixel-ratio:2){#logo{background:url(//www.google.com/images/branding/googlelogo/2x/googlelogo_color_150x54dp.png) no-repeat;-webkit-background-size:100% 100%}}#logo{display:inline-block;height:54px;width:150px} </style> <a href= //www.google.com/><span id=logo aria-label=Google></span></a> <p><b>411.</b> <ins>That’s an error.</ins> <p>POST requests require a <code>Content-length</code> header. <ins>That’s all we know.</ins> at hudson.plugins.swarm.SwarmClient.createSwarmAgent(SwarmClient.java:457) at hudson.plugins.swarm.Client.run(Client.java:204) at hudson.plugins.swarm.Client.main(Client.java:73)Aug 25, 2021 4:18:29 PM hudson.plugins.swarm.Client run WARNING: Remaining retries: 5 Aug 25, 2021 4:18:29 PM hudson.plugins.swarm.Client run INFO: Retrying in 10 seconds

Basil Crow added a comment - 2021-08-27 18:38

Fixed in jenkinsci/swarm-plugin#360. Released in 3.28.

Basil Crow added a comment - 2021-08-27 18:38 Fixed in jenkinsci/swarm-plugin#360 . Released in 3.28 .

Assignee:: Gavin Williams

Reporter:: Heiko Thiery

Votes:: 0 Vote for this issue

Watchers:: 4 Start watching this issue

Created:: 2021-08-09 11:05

Updated:: 2021-08-27 18:38

Resolved:: 2021-08-27 18:38

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Collapse comment: Heiko Thiery added a comment - 2021-08-11 06:17

Expand comment: Heiko Thiery added a comment - 2021-08-11 06:17

Collapse comment: Basil Crow added a comment - 2021-08-14 16:41

Expand comment: Basil Crow added a comment - 2021-08-14 16:41

Collapse comment: Gavin Williams added a comment - 2021-08-24 20:02, Edited by Gavin Williams - 2021-08-24 22:27

Expand comment: Gavin Williams added a comment - 2021-08-24 20:02, Edited by Gavin Williams - 2021-08-24 22:27

Collapse comment: Basil Crow added a comment - 2021-08-25 14:47

Expand comment: Basil Crow added a comment - 2021-08-25 14:47

Collapse comment: Gavin Williams added a comment - 2021-08-25 15:18, Edited by Gavin Williams - 2021-08-25 15:18

Expand comment: Gavin Williams added a comment - 2021-08-25 15:18, Edited by Gavin Williams - 2021-08-25 15:18

Collapse comment: Gavin Williams added a comment - 2021-08-25 15:20

Expand comment: Gavin Williams added a comment - 2021-08-25 15:20

Collapse comment: Basil Crow added a comment - 2021-08-27 18:38

Expand comment: Basil Crow added a comment - 2021-08-27 18:38

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