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Bug
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Resolution: Incomplete
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Minor
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System Properties
awt.toolkit sun.awt.X11.XToolkit
com.sun.org.apache.xml.internal.dtm.DTMManager com.sun.org.apache.xml.internal.dtm.ref.DTMManagerDefault
executable-war /usr/share/jenkins/jenkins.war
file.encoding utf8
file.encoding.pkg sun.io
file.separator /
hudson.model.LoadStatistics.decay 0.7
hudson.model.ParametersAction.keepUndefinedParameters false
hudson.plugins.ec2.SlaveTemplate.skipCheckInstance true
hudson.slaves.NodeProvisioner.MARGIN 30
hudson.slaves.NodeProvisioner.MARGIN0 0.6
java.awt.graphicsenv sun.awt.X11GraphicsEnvironment
java.awt.headless true
java.awt.printerjob sun.print.PSPrinterJob
java.class.path /usr/share/jenkins/jenkins.war
java.class.version 52.0
java.endorsed.dirs /usr/lib/jvm/java-8-oracle/jre/lib/endorsed
java.ext.dirs /usr/lib/jvm/java-8-oracle/jre/lib/ext:/usr/java/packages/lib/ext
java.home /usr/lib/jvm/java-8-oracle/jre
java.io.tmpdir /tmp
java.library.path /usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
java.runtime.name Java(TM) SE Runtime Environment
java.runtime.version 1.8.0_162-b12
java.specification.name Java Platform API Specification
java.specification.vendor Oracle Corporation
java.specification.version 1.8
java.vendor Oracle Corporation
java.vendor.url http://java.oracle.com/
java.vendor.url.bug http://bugreport.sun.com/bugreport/
java.version 1.8.0_162
java.vm.info mixed mode
java.vm.name Java HotSpot(TM) 64-Bit Server VM
java.vm.specification.name Java Virtual Machine Specification
java.vm.specification.vendor Oracle Corporation
java.vm.specification.version 1.8
java.vm.vendor Oracle Corporation
java.vm.version 25.162-b12
javax.xml.parsers.DocumentBuilderFactory com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl
jetty.git.hash d5fc0523cfa96bfebfbda19606cad384d772f04c
jna.loaded true
jna.platform.library.path /usr/lib/x86_64-linux-gnu:/lib/x86_64-linux-gnu:/lib64:/usr/lib:/lib:/usr/lib/x86_64-linux-gnu/libfakeroot:/usr/lib/x86_64-linux-gnu/mesa-egl
jnidispatch.path /tmp/jna--1712433994/jna898753681106629507.tmp
line.separator
mail.smtp.sendpartial true
mail.smtps.sendpartial true
os.arch amd64
os.name Linux
os.version 4.4.0-130-generic
path.separator :
sun.arch.data.model 64
sun.boot.class.path /usr/lib/jvm/java-8-oracle/jre/lib/resources.jar:/usr/lib/jvm/java-8-oracle/jre/lib/rt.jar:/usr/lib/jvm/java-8-oracle/jre/lib/sunrsasign.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jsse.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jce.jar:/usr/lib/jvm/java-8-oracle/jre/lib/charsets.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jfr.jar:/usr/lib/jvm/java-8-oracle/jre/classes
sun.boot.library.path /usr/lib/jvm/java-8-oracle/jre/lib/amd64
sun.cpu.endian little
sun.cpu.isalist
sun.font.fontmanager sun.awt.X11FontManager
sun.io.unicode.encoding UnicodeLittle
sun.java.command /usr/share/jenkins/jenkins.war --webroot=/var/cache/jenkins/war --httpPort=8082 --ajp13Port=-1 --httpsPort=-1 --sessionTimeout=1440
sun.java.launcher SUN_STANDARD
sun.jnu.encoding UTF-8
sun.management.compiler HotSpot 64-Bit Tiered Compilers
sun.os.patch.level unknown
svnkit.http.methods Digest,Basic,NTLM,Negotiate
svnkit.ssh2.persistent false
user.country US
user.dir /
user.home /home/jenkins
user.language en
user.name jenkins
user.timezone Etc/UTC
Environment Variables
Name ↓
Value
_ /usr/bin/daemon
HOME /home/jenkins
JAVA_TOOL_OPTIONS -Dfile.encoding=UTF8
JENKINS_HOME /mnt/jenkins
LANG en_US.UTF-8
LOGNAME jenkins
MAIL /var/mail/jenkins
PATH /usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/snap/bin
PGSSLROOTCERT /usr/local/etc/ssl/certs/aws-combined.pem
PWD /home/jenkins
SHELL /bin/bash
SHLVL 1
USER jenkins
XDG_RUNTIME_DIR /run/user/1002
XDG_SESSION_ID c4
Plugins
Name ↓
Version
Enabled
ace-editor 1.1 true
analysis-core 1.95 true
ansicolor 0.5.2 true
ant 1.8 true
antisamy-markup-formatter 1.5 true
apache-httpcomponents-client-4-api 4.5.5-3.0 true
authentication-tokens 1.3 true
aws-credentials 1.23 true
aws-java-sdk 1.11.341 true
basic-branch-build-strategies 1.0.1 true
blueocean 1.7.1 true
blueocean-autofavorite 1.2.2 true
blueocean-bitbucket-pipeline 1.7.1 true
blueocean-commons 1.7.1 true
blueocean-config 1.7.1 true
blueocean-core-js 1.7.1 true
blueocean-dashboard 1.7.1 true
blueocean-display-url 2.2.0 true
blueocean-events 1.7.1 true
blueocean-git-pipeline 1.7.1 true
blueocean-github-pipeline 1.7.1 true
blueocean-i18n 1.7.1 true
blueocean-jira 1.7.1 true
blueocean-jwt 1.7.1 true
blueocean-personalization 1.7.1 true
blueocean-pipeline-api-impl 1.7.1 true
blueocean-pipeline-editor 1.7.1 true
blueocean-pipeline-scm-api 1.7.1 true
blueocean-rest 1.7.1 true
blueocean-rest-impl 1.7.1 true
blueocean-web 1.7.1 true
bouncycastle-api 2.16.3 true
branch-api 2.0.20 true
build-monitor-plugin 1.12+build.201805070054 true
build-name-setter 1.6.9 true
build-pipeline-plugin 1.5.8 true
build-timeout 1.19 true
build-user-vars-plugin 1.5 true
built-on-column 1.1 true
cloudbees-bitbucket-branch-source 2.2.12 true
cloudbees-folder 6.5.1 true
command-launcher 1.2 true
conditional-buildstep 1.3.6 true
copyartifact 1.41 true
credentials 2.1.18 true
credentials-binding 1.16 true
display-url-api 2.2.0 true
docker-commons 1.13 true
docker-workflow 1.17 true
durable-task 1.22 true
ec2 1.40-SNAPSHOT (private-b9392270-elliotbabchick) true
email-ext 2.62 true
envinject 2.1.6 true
envinject-api 1.5 true
external-monitor-job 1.7 true
favorite 2.3.2 true
git 3.9.1 true
git-client 3.0.0-beta4 true
git-parameter 0.9.3 true
git-server 1.7 true
github 1.29.2 true
github-api 1.92 true
github-branch-source 2.3.6 true
github-tag-trigger 1.0-SNAPSHOT (private-2f26a491-elliotbabchick) true
google-login 1.4 true
gradle 1.29 true
groovy 2.0 true
handlebars 1.1.1 true
handy-uri-templates-2-api 2.1.6-1.0 true
heavy-job 1.1 true
htmlpublisher 1.16 true
jackson2-api 2.8.11.3 true
javadoc 1.4 true
jdk-tool 1.1 true
jenkins-design-language 1.7.1 true
jenkins-multijob-plugin 1.30 true
jira 3.0.0 true
job-dsl 1.70 true
jobConfigHistory 2.18 true
jquery 1.12.4-0 true
jquery-detached 1.2.1 true
jsch 0.1.54.2 true
junit 1.24 true
ldap 1.20 true
mailer 1.21 true
mapdb-api 1.0.9.0 true
mask-passwords 2.12.0 true
matrix-auth 2.3 true
matrix-project 1.13 true
maven-plugin 3.1.2 true
mercurial 2.4 true
metrics 4.0.2.2 true
momentjs 1.1.1 true
node-iterator-api 1.5.0 true
pam-auth 1.3 true
parameterized-trigger 2.35.2 true
phabricator-plugin-affirm-fork 1.9.8-SNAPSHOT-AFFIRM-JENKINS2 true
pipeline-build-step 2.7 true
pipeline-github-lib 1.0 true
pipeline-graph-analysis 1.7 true
pipeline-input-step 2.8 true
pipeline-milestone-step 1.3.1 true
pipeline-model-api 1.3.1 true
pipeline-model-declarative-agent 1.1.1 true
pipeline-model-definition 1.3.1 true
pipeline-model-extensions 1.3.1 true
pipeline-rest-api 2.10 true
pipeline-stage-step 2.3 true
pipeline-stage-tags-metadata 1.3.1 true
pipeline-stage-view 2.10 true
pipeline-utility-steps 2.1.0 true
plain-credentials 1.4 true
postbuildscript 2.7.0 true
pubsub-light 1.12 true
rebuild 1.28 true
resource-disposer 0.11 true
role-strategy 2.8.1 true
run-condition 1.0 true
s3 0.11.2 true
scm-api 2.2.7 true
script-security 1.44 true
shiningpanda 0.24 true
simple-theme-plugin 0.4 true
sse-gateway 1.15 true
ssh-agent 1.15 true
ssh-credentials 1.14 true
ssh-slaves 1.26 true
structs 1.14 true
subversion 2.11.1 true
support-core 2.49 true
timestamper 1.8.10 true
token-macro 2.5 true
variant 1.1 true
violations 0.7.11 true
warnings 4.68 true
windows-slaves 1.3.1 true
workflow-aggregator 2.5 true
workflow-api 2.28 true
workflow-basic-steps 2.9 true
workflow-cps 2.54 true
workflow-cps-global-lib 2.9 true
workflow-durable-task-step 2.19 true
workflow-job 2.23 true
workflow-multibranch 2.20 true
workflow-scm-step 2.6 true
workflow-step-api 2.16 true
workflow-support 2.19 true
ws-cleanup 0.34 trueSystem Properties awt.toolkit sun.awt.X11.XToolkit com.sun.org.apache.xml.internal.dtm.DTMManager com.sun.org.apache.xml.internal.dtm.ref.DTMManagerDefault executable-war /usr/share/jenkins/jenkins.war file.encoding utf8 file.encoding.pkg sun.io file.separator / hudson.model.LoadStatistics.decay 0.7 hudson.model.ParametersAction.keepUndefinedParameters false hudson.plugins.ec2.SlaveTemplate.skipCheckInstance true hudson.slaves.NodeProvisioner.MARGIN 30 hudson.slaves.NodeProvisioner.MARGIN0 0.6 java.awt.graphicsenv sun.awt.X11GraphicsEnvironment java.awt.headless true java.awt.printerjob sun.print.PSPrinterJob java.class.path /usr/share/jenkins/jenkins.war java.class.version 52.0 java.endorsed.dirs /usr/lib/jvm/java-8-oracle/jre/lib/endorsed java.ext.dirs /usr/lib/jvm/java-8-oracle/jre/lib/ext:/usr/java/packages/lib/ext java.home /usr/lib/jvm/java-8-oracle/jre java.io.tmpdir /tmp java.library.path /usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib java.runtime.name Java(TM) SE Runtime Environment java.runtime.version 1.8.0_162-b12 java.specification.name Java Platform API Specification java.specification.vendor Oracle Corporation java.specification.version 1.8 java.vendor Oracle Corporation java.vendor.url http://java.oracle.com/ java.vendor.url.bug http://bugreport.sun.com/bugreport/ java.version 1.8.0_162 java.vm.info mixed mode java.vm.name Java HotSpot(TM) 64-Bit Server VM java.vm.specification.name Java Virtual Machine Specification java.vm.specification.vendor Oracle Corporation java.vm.specification.version 1.8 java.vm.vendor Oracle Corporation java.vm.version 25.162-b12 javax.xml.parsers.DocumentBuilderFactory com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl jetty.git.hash d5fc0523cfa96bfebfbda19606cad384d772f04c jna.loaded true jna.platform.library.path /usr/lib/x86_64-linux-gnu:/lib/x86_64-linux-gnu:/lib64:/usr/lib:/lib:/usr/lib/x86_64-linux-gnu/libfakeroot:/usr/lib/x86_64-linux-gnu/mesa-egl jnidispatch.path /tmp/jna--1712433994/jna898753681106629507.tmp line.separator mail.smtp.sendpartial true mail.smtps.sendpartial true os.arch amd64 os.name Linux os.version 4.4.0-130-generic path.separator : sun.arch.data.model 64 sun.boot.class.path /usr/lib/jvm/java-8-oracle/jre/lib/resources.jar:/usr/lib/jvm/java-8-oracle/jre/lib/rt.jar:/usr/lib/jvm/java-8-oracle/jre/lib/sunrsasign.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jsse.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jce.jar:/usr/lib/jvm/java-8-oracle/jre/lib/charsets.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jfr.jar:/usr/lib/jvm/java-8-oracle/jre/classes sun.boot.library.path /usr/lib/jvm/java-8-oracle/jre/lib/amd64 sun.cpu.endian little sun.cpu.isalist sun.font.fontmanager sun.awt.X11FontManager sun.io.unicode.encoding UnicodeLittle sun.java.command /usr/share/jenkins/jenkins.war --webroot=/var/cache/jenkins/war --httpPort=8082 --ajp13Port=-1 --httpsPort=-1 --sessionTimeout=1440 sun.java.launcher SUN_STANDARD sun.jnu.encoding UTF-8 sun.management.compiler HotSpot 64-Bit Tiered Compilers sun.os.patch.level unknown svnkit.http.methods Digest,Basic,NTLM,Negotiate svnkit.ssh2.persistent false user.country US user.dir / user.home /home/jenkins user.language en user.name jenkins user.timezone Etc/UTC Environment Variables Name ↓ Value _ /usr/bin/daemon HOME /home/jenkins JAVA_TOOL_OPTIONS -Dfile.encoding=UTF8 JENKINS_HOME /mnt/jenkins LANG en_US.UTF-8 LOGNAME jenkins MAIL /var/mail/jenkins PATH /usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/snap/bin PGSSLROOTCERT /usr/local/etc/ssl/certs/aws-combined.pem PWD /home/jenkins SHELL /bin/bash SHLVL 1 USER jenkins XDG_RUNTIME_DIR /run/user/1002 XDG_SESSION_ID c4 Plugins Name ↓ Version Enabled ace-editor 1.1 true analysis-core 1.95 true ansicolor 0.5.2 true ant 1.8 true antisamy-markup-formatter 1.5 true apache-httpcomponents-client-4-api 4.5.5-3.0 true authentication-tokens 1.3 true aws-credentials 1.23 true aws-java-sdk 1.11.341 true basic-branch-build-strategies 1.0.1 true blueocean 1.7.1 true blueocean-autofavorite 1.2.2 true blueocean-bitbucket-pipeline 1.7.1 true blueocean-commons 1.7.1 true blueocean-config 1.7.1 true blueocean-core-js 1.7.1 true blueocean-dashboard 1.7.1 true blueocean-display-url 2.2.0 true blueocean-events 1.7.1 true blueocean-git-pipeline 1.7.1 true blueocean-github-pipeline 1.7.1 true blueocean-i18n 1.7.1 true blueocean-jira 1.7.1 true blueocean-jwt 1.7.1 true blueocean-personalization 1.7.1 true blueocean-pipeline-api-impl 1.7.1 true blueocean-pipeline-editor 1.7.1 true blueocean-pipeline-scm-api 1.7.1 true blueocean-rest 1.7.1 true blueocean-rest-impl 1.7.1 true blueocean-web 1.7.1 true bouncycastle-api 2.16.3 true branch-api 2.0.20 true build-monitor-plugin 1.12+build.201805070054 true build-name-setter 1.6.9 true build-pipeline-plugin 1.5.8 true build-timeout 1.19 true build-user-vars-plugin 1.5 true built-on-column 1.1 true cloudbees-bitbucket-branch-source 2.2.12 true cloudbees-folder 6.5.1 true command-launcher 1.2 true conditional-buildstep 1.3.6 true copyartifact 1.41 true credentials 2.1.18 true credentials-binding 1.16 true display-url-api 2.2.0 true docker-commons 1.13 true docker-workflow 1.17 true durable-task 1.22 true ec2 1.40-SNAPSHOT (private-b9392270-elliotbabchick) true email-ext 2.62 true envinject 2.1.6 true envinject-api 1.5 true external-monitor-job 1.7 true favorite 2.3.2 true git 3.9.1 true git-client 3.0.0-beta4 true git-parameter 0.9.3 true git-server 1.7 true github 1.29.2 true github-api 1.92 true github-branch-source 2.3.6 true github-tag-trigger 1.0-SNAPSHOT (private-2f26a491-elliotbabchick) true google-login 1.4 true gradle 1.29 true groovy 2.0 true handlebars 1.1.1 true handy-uri-templates-2-api 2.1.6-1.0 true heavy-job 1.1 true htmlpublisher 1.16 true jackson2-api 2.8.11.3 true javadoc 1.4 true jdk-tool 1.1 true jenkins-design-language 1.7.1 true jenkins-multijob-plugin 1.30 true jira 3.0.0 true job-dsl 1.70 true jobConfigHistory 2.18 true jquery 1.12.4-0 true jquery-detached 1.2.1 true jsch 0.1.54.2 true junit 1.24 true ldap 1.20 true mailer 1.21 true mapdb-api 1.0.9.0 true mask-passwords 2.12.0 true matrix-auth 2.3 true matrix-project 1.13 true maven-plugin 3.1.2 true mercurial 2.4 true metrics 4.0.2.2 true momentjs 1.1.1 true node-iterator-api 1.5.0 true pam-auth 1.3 true parameterized-trigger 2.35.2 true phabricator-plugin-affirm-fork 1.9.8-SNAPSHOT-AFFIRM-JENKINS2 true pipeline-build-step 2.7 true pipeline-github-lib 1.0 true pipeline-graph-analysis 1.7 true pipeline-input-step 2.8 true pipeline-milestone-step 1.3.1 true pipeline-model-api 1.3.1 true pipeline-model-declarative-agent 1.1.1 true pipeline-model-definition 1.3.1 true pipeline-model-extensions 1.3.1 true pipeline-rest-api 2.10 true pipeline-stage-step 2.3 true pipeline-stage-tags-metadata 1.3.1 true pipeline-stage-view 2.10 true pipeline-utility-steps 2.1.0 true plain-credentials 1.4 true postbuildscript 2.7.0 true pubsub-light 1.12 true rebuild 1.28 true resource-disposer 0.11 true role-strategy 2.8.1 true run-condition 1.0 true s3 0.11.2 true scm-api 2.2.7 true script-security 1.44 true shiningpanda 0.24 true simple-theme-plugin 0.4 true sse-gateway 1.15 true ssh-agent 1.15 true ssh-credentials 1.14 true ssh-slaves 1.26 true structs 1.14 true subversion 2.11.1 true support-core 2.49 true timestamper 1.8.10 true token-macro 2.5 true variant 1.1 true violations 0.7.11 true warnings 4.68 true windows-slaves 1.3.1 true workflow-aggregator 2.5 true workflow-api 2.28 true workflow-basic-steps 2.9 true workflow-cps 2.54 true workflow-cps-global-lib 2.9 true workflow-durable-task-step 2.19 true workflow-job 2.23 true workflow-multibranch 2.20 true workflow-scm-step 2.6 true workflow-step-api 2.16 true workflow-support 2.19 true ws-cleanup 0.34 true
We have been observing an issue where jobs that are completed occupy executor slots on our Jenkins slaves (AWS EC2 instances), and this seems to be causing a backup in our build queue that is usually managed by the EC2 cloud plugin spinning up/down nodes as needed. When this problem manifests, we usually see it correspond with the ec2 cloud plugin failing to autoscale new nodes and and a subsequent massive buildup in our build queue until we have to restart the master and kill all jobs to recover
These "zombie executor slots" do clear themselves up after 5-60+ minutes pass it seems, and often they are downstream jobs of still-ongoing parent jobs, but not always (sometimes the parent jobs are also completed but the executor still remains occupied). CPU and memory don't seem too strained when this problem manifests.
The general job heirarchy goes where this manifests looks like {1 root job} -> {produces 1-6 child "target building" jobs in parallel} -> {each produces 5-80 "unit testing jobs" in parallel}. We usually see the issue manifest on this group of jobs (the only ones really running on this cluster) when it's under medium-high load, running 100+ jobs simultaneously across tens of nodes.
I'm attaching a thread dump I downloaded from a slave exhibiting this behavior of having its executors occupied (all 4/4 of them) with jobs that are finished running. I'm actually attaching two dumps, the second taken a few minutes after the first on the same slave, because it seems like there is some activity happening with new threads spinning up, although I'm not sure what exactly their purpose is. I will try to generated and submit the zip from the core support plugin the next time I see the problem manifesting.
- relates to
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JENKINS-61087 Use FlowExecutionList to calculate the number of running Pipeline jobs
-
- Resolved
-