# Post jenkins upgrade, windows agent not connecting
**URL:** https://community.jenkins.io/t/post-jenkins-upgrade-windows-agent-not-connecting/12154
**Category:** Using Jenkins
**Tags:** question
**Created:** [February 1, 2024, 10:34am UTC](https://community.jenkins.io/t/post-jenkins-upgrade-windows-agent-not-connecting/12154 "2024-02-01T10:34:40Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@yogeshwari.morde](https://community.jenkins.io/u/yogeshwari.morde)
#### Post date: [February 1, 2024, 10:34am UTC](https://community.jenkins.io/t/post-jenkins-upgrade-windows-agent-not-connecting/12154/1 "2024-02-01T10:34:41Z")
Hi,
Recently I upgraded Jenkins from 2.249 to 2.426.1. After that windows agent agent shows offline. Please help with troubleshooting this.
Jenkins setup:
## Jenkins: 2.426.1 OS: Linux - 4.14.35-2047.532.3.el7uek.x86\_64 Java: 11.0.20 - Oracle Corporation (Java HotSpot™ 64-Bit Server VM)
Office-365-Connector:4.20.2
ace-editor:1.1
active-directory:2.34
ansicolor:1.0.4
ant:497.v94e7d9fffa\_b\_9
antisamy-markup-formatter:162.v0e6ec0fcfcf6
apache-httpcomponents-client-4-api:4.5.14-208.v438351942757
authentication-tokens:1.53.v1c90fd9191a\_b\_
authorize-project:1.7.1
basic-branch-build-strategies:81.v05e333931c7d
blueocean-commons:1.27.9
blueocean-core-js:1.27.9
blueocean-dashboard:1.27.9
blueocean-display-url:2.4.2
blueocean-github-pipeline:1.27.9
blueocean-i18n:1.27.9
blueocean-jwt:1.27.9
blueocean-personalization:1.27.9
blueocean-pipeline-api-impl:1.27.9
blueocean-pipeline-scm-api:1.27.9
blueocean-rest:1.27.9
blueocean-rest-impl:1.27.9
blueocean-web:1.27.9
bootstrap5-api:5.3.2-3
bouncycastle-api:2.30.1.77-225.v26ea\_c9455fd9
branch-api:2.1144.v1425d1c3d5a\_7
build-pipeline-plugin:2.0.1
build-timeout:1.32
build-user-vars-plugin:1.9
caffeine-api:3.1.8-133.v17b\_1ff2e0599
checks-api:2.0.2
cloudbees-bitbucket-branch-source:856.v04c46c86f911
cloudbees-folder:6.858.v898218f3609d
codesonar:3.5.0
command-launcher:107.v773860566e2e
commons-httpclient3-api:3.1-3
commons-lang3-api:3.13.0-62.v7d18e55f51e2
commons-text-api:1.11.0-95.v22a\_d30ee5d36
conditional-buildstep:1.4.3
config-file-provider:959.vcff671a\_4518b\_
console-column-plugin:241.va\_a\_50a\_4693b\_d2
credentials:1311.vcf0a\_900b\_37c2
credentials-binding:642.v737c34dea\_6c2
custom-job-icon:0.2
custom-tools-plugin:0.8
dashboard-view:2.495.v07e81500c3f2
data-tables-api:1.13.8-2
disk-usage:1.2
display-url-api:2.200.vb\_9327d658781
docker-commons:439.va\_3cb\_0a\_6a\_fb\_29
docker-workflow:572.v950f58993843
durable-task:543.v262f6a\_803410
echarts-api:5.4.3-2
email-ext:2.103
envinject:2.908.v66a\_774b\_31d93
envinject-api:1.199.v3ce31253ed13
extended-choice-parameter:376.v2e02857547b\_a\_
extended-read-permission:53.v6499940139e5
extensible-choice-parameter:1.8.1
external-monitor-job:215.v2e88e894db\_f8
extra-columns:1.26
favorite:2.208.v91d65b\_7792a\_c
filesystem-list-parameter-plugin:0.0.9
flexible-publish:0.16.1
folder-properties:1.2.1
font-awesome-api:6.5.1-1
git:5.2.1
git-changelog:3.36
git-client:4.6.0
git-server:99.va\_0826a\_b\_cdfa\_d
github:1.37.3.1
github-api:1.318-461.v7a\_c09c9fa\_d63
github-branch-source:1767.va\_7d01ea\_c7256
github-oauth:597.ve0c3480fcb\_d0
github-pullrequest:0.6.1
gradle:2.9
greenballs:1.15.1
groovy:457.v99900cb\_85593
gson-api:2.10.1-3.vb\_25b\_599b\_e4f8
handlebars:3.0.8
handy-uri-templates-2-api:2.1.8-30.v7e777411b\_148
htmlpublisher:1.32
inline-pipeline:1.0.3
instance-identity:173.va\_37c494ec4e5
ionicons-api:56.v1b\_1c8c49374e
ivy:2.5
jackson2-api:2.16.1-373.ve709c6871598
jakarta-activation-api:2.0.1-3
jakarta-mail-api:2.0.1-3
javadoc:243.vb\_b\_503b\_b\_45537
javax-activation-api:1.2.0-6
javax-mail-api:1.6.2-9
jaxb:2.3.9-1
jdk-tool:73.vddf737284550
jenkins-design-language:1.27.9
jjwt-api:0.11.5-77.v646c772fddb\_0
job-dsl:1.87
job-import-plugin:3.6
jobConfigHistory:1229.v3039470161a\_d
joda-time-api:2.12.5-5.v5495a\_235fedf
jquery:1.12.4-1
jquery-detached:1.2.1
jquery3-api:3.7.1-1
jsch:0.2.16-86.v42e010d9484b\_
json-path-api:2.8.0-21.v8b\_7dc8b\_1037b\_
junit:1252.vfc2e5efa\_294f
ldap:711.vb\_d1a\_491714dc
lockable-resources:1222.v3d55a\_36d63e4
mailer:463.vedf8358e006b\_
mapdb-api:1.0.9-28.vf251ce40855d
mask-passwords:173.v6a\_077a\_291eb\_5
matrix-auth:3.2.1
matrix-project:822.v01b\_8c85d16d2
maven-plugin:3.23
mercurial:1260.vdfb\_723cdcc81
mina-sshd-api-common:2.11.0-86.v836f585d47fa\_
mina-sshd-api-core:2.11.0-86.v836f585d47fa\_
momentjs:1.1.1
msbuild:1.30
multi-branch-project-plugin:0.7
multi-agent-config-plugin:1.2.0
multibranch-action-triggers:1.8.6
multibranch-build-strategy-extension:46.v9de263eb\_869c
nexus-artifact-uploader:2.14
nodejs:1.6.1
okhttp-api:4.11.0-157.v6852a\_a\_fa\_ec11
pam-auth:1.10
parameterized-trigger:787.v665fcf2a\_830b\_
pipeline-build-step:540.vb\_e8849e1a\_b\_d8
pipeline-cps-http:0.3.1
pipeline-github:2.8-159.09e4403bc62f
pipeline-github-lib:42.v0739460cda\_c4
pipeline-githubnotify-step:49.vf37bf92d2bc8
pipeline-graph-analysis:202.va\_d268e64deb\_3
pipeline-groovy-lib:689.veec561a\_dee13
pipeline-input-step:477.v339683a\_8d55e
pipeline-milestone-step:111.v449306f708b\_7
pipeline-model-api:2.2168.vf921b\_4e72c73
pipeline-model-declarative-agent:1.1.1
pipeline-model-definition:2.2168.vf921b\_4e72c73
pipeline-model-extensions:2.2168.vf921b\_4e72c73
pipeline-multibranch-defaults:2.1
pipeline-rest-api:2.34
pipeline-stage-step:305.ve96d0205c1c6
pipeline-stage-tags-metadata:2.2168.vf921b\_4e72c73
pipeline-stage-view:2.34
pipeline-utility-steps:2.16.0
plain-credentials:143.v1b\_df8b\_d3b\_e48
plugin-util-api:3.8.0
popper-api:1.16.1-3
popper2-api:2.11.6-4
publish-over:0.22
publish-over-ssh:1.25
pubsub-light:1.18
rebuild:330.v645b\_7df10e2a\_
remote-file:1.24
repository-connector:2.2.1
resource-disposer:0.23
role-strategy:689.v731678c3e0eb\_
run-condition:1.7
saml:4.429.v9a\_781a\_61f1da\_
scm-api:683.vb\_16722fb\_b\_80b\_
script-security:1310.vf24a\_dfce068b\_
shared-workspace:1.0.2
simple-theme-plugin:176.v39740c03a\_a\_f5
skip-certificate-check:1.1
snakeyaml-api:2.2-111.vc6598e30cc65
soapui-pro-functional-testing:1.10
sonar:2.17
sse-gateway:1.26
ssh:2.6.1
ssh-credentials:308.ve4497b\_ccd8f4
ssh-slaves:2.947.v64ee6b\_f87b\_c1
ssh-steps:2.0.68.va\_d21a\_12a\_6476
sshd:3.303.vefc7119b\_ec23
structs:325.vcb\_307d2a\_2782
subversion:2.17.3
timestamper:1.26
token-macro:400.v35420b\_922dcb\_
trilead-api:2.133.vfb\_8a\_7b\_9c5dd1
uno-choice:2.8.1
variant:60.v7290fc0eb\_b\_cd
windows-slaves:1.8.1
workflow-aggregator:596.v8c21c963d92d
workflow-api:1283.v99c10937efcb\_
workflow-basic-steps:1042.ve7b\_140c4a\_e0c
workflow-cps:3832.vc43e04d6d68c
workflow-cps-global-lib:609.vd95673f149b\_b
workflow-cps-global-lib-http:2.36.0
workflow-durable-task-step:1313.vcb\_970b\_d2a\_fb\_3
workflow-job:1385.vb\_58b\_86ea\_fff1
workflow-multibranch:770.v1a\_d0708dd1f6
workflow-scm-step:415.v434365564324
workflow-step-api:639.v6eca\_cd8c04a\_a\_
workflow-support:865.v43e78cc44e0d
ws-cleanup:0.45
---
### Author:  [@smuppala](https://community.jenkins.io/u/smuppala)
#### Post date: [February 2, 2024, 5:09pm UTC](https://community.jenkins.io/t/post-jenkins-upgrade-windows-agent-not-connecting/12154/2 "2024-02-02T17:09:40Z")
what is the error in the node log. The issue I have seen for connecting Alma8.8 is that Java version on the node has to match with Java version on Jenkins.
Mine is
java -version
openjdk version “17.0.9” 2023-10-17
OpenJDK Runtime Environment Temurin-17.0.9+9 (build 17.0.9+9)
OpenJDK 64-Bit Server VM Temurin-17.0.9+9 (build 17.0.9+9, mixed mode)
In your case I am thinking your Windows node should have Java: 11.0.20 if that is what the version on your Jenkins server.
---
### Author:  [@SAGARGAUD01](https://community.jenkins.io/u/SAGARGAUD01)
#### Post date: [February 4, 2024, 9:11pm UTC](https://community.jenkins.io/t/post-jenkins-upgrade-windows-agent-not-connecting/12154/3 "2024-02-04T21:11:14Z")
After upgrading Jenkins to version 2.426.1, troubleshoot the Windows agent offline issue by verifying network connectivity, ensuring the agent is running a compatible version, checking Java compatibility, reviewing firewall settings, and examining agent logs for error messages. Confirm plugin compatibility, recheck JNLP configuration, and restart the agent service. If issues persist, inspect Jenkins controller logs, attempt node reconnection in the UI, and seek community assistance on forums. Consider temporary plugin disablement and SSL/TLS configuration review. If needed, rollback Jenkins for a quick test and systematically perform these steps to identify and resolve the problem.
---
### Author:  [@yogeshwari.morde](https://community.jenkins.io/u/yogeshwari.morde)
#### Post date: [February 14, 2024, 3:05pm UTC](https://community.jenkins.io/t/post-jenkins-upgrade-windows-agent-not-connecting/12154/4 "2024-02-14T15:05:02Z")
I was able to resolve the issues by copying cacerts file from previous/old java home to new java home.