Cannot access built html files published by HTML plugin

Using Jenkins
1

In my pipeline I use HTML plugin to publish code coverage reports for my project:

                    publishHTML reportName: 'Backend Coverage',
                        reportDir: 'build/html/coverage-backend/',
                        reportFiles: 'index.html',
                        keepAll: true

After completed build, when I try to access my html code coverage, I always receive a blank page. I tried different files from the “workspace” browser, and for every file I see a blank page. In the browser console I see the “500 error” without any details.
I checked Jenkins logs, and that’s what I found:

lut 20, 2024 1:50:26 PM WARNING hudson.init.impl.InstallUncaughtExceptionHandler handleException

null
org.eclipse.jetty.http.BadMessageException: 500: Response header too large
	at org.eclipse.jetty.server.HttpConnection$SendCallback.process(HttpConnection.java:774)
	at org.eclipse.jetty.util.IteratingCallback.processing(IteratingCallback.java:243)
	at org.eclipse.jetty.util.IteratingCallback.iterate(IteratingCallback.java:224)
	at org.eclipse.jetty.server.HttpConnection.send(HttpConnection.java:589)
	at org.eclipse.jetty.server.HttpChannel.sendResponse(HttpChannel.java:1046)
	at org.eclipse.jetty.server.HttpChannel.write(HttpChannel.java:1123)
	at org.eclipse.jetty.server.HttpOutput.channelWrite(HttpOutput.java:270)
	at org.eclipse.jetty.server.HttpOutput.close(HttpOutput.java:623)
	at com.jcraft.jzlib.DeflaterOutputStream.close(DeflaterOutputStream.java:122)
	at org.kohsuke.stapler.compression.FilterServletOutputStream.close(FilterServletOutputStream.java:46)
	at org.springframework.security.web.util.OnCommittedResponseWrapper$SaveContextServletOutputStream.close(OnCommittedResponseWrapper.java:529)
	at org.kohsuke.stapler.Stapler.serveStaticResource(Stapler.java:637)
	at org.kohsuke.stapler.ResponseImpl.serveFile(ResponseImpl.java:231)
	at hudson.model.DirectoryBrowserSupport.serveFile(DirectoryBrowserSupport.java:425)
	at hudson.model.DirectoryBrowserSupport.generateResponse(DirectoryBrowserSupport.java:171)
	at org.kohsuke.stapler.HttpResponseRenderer$Default.handleHttpResponse(HttpResponseRenderer.java:124)
	at org.kohsuke.stapler.HttpResponseRenderer$Default.generateResponse(HttpResponseRenderer.java:69)
	at org.kohsuke.stapler.Function.renderResponse(Function.java:159)
	at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:142)
	at org.kohsuke.stapler.MetaClass$10.dispatch(MetaClass.java:501)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:770)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:900)
	at org.kohsuke.stapler.MetaClass$9.dispatch(MetaClass.java:475)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:770)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:900)
	at org.kohsuke.stapler.MetaClass$4.doDispatch(MetaClass.java:289)
	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:59)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:770)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:900)
	at org.kohsuke.stapler.MetaClass$2.doDispatch(MetaClass.java:224)
	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:59)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:770)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:900)
	at org.kohsuke.stapler.MetaClass$9.dispatch(MetaClass.java:475)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:770)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:900)
	at org.kohsuke.stapler.MetaClass$4.doDispatch(MetaClass.java:289)
	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:59)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:770)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:900)
	at org.kohsuke.stapler.MetaClass$4.doDispatch(MetaClass.java:289)
	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:59)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:770)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:900)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:698)
	at org.kohsuke.stapler.Stapler.service(Stapler.java:248)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:590)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764)
	at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1665)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:163)
	at org.jenkinsci.plugins.ssegateway.Endpoint$SSEListenChannelFilter.doFilter(Endpoint.java:248)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:160)
	at io.jenkins.blueocean.ResourceCacheControl.doFilter(ResourceCacheControl.java:134)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:160)
	at io.jenkins.blueocean.auth.jwt.impl.JwtAuthenticationFilter.doFilter(JwtAuthenticationFilter.java:60)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:160)
	at jenkins.util.HttpServletFilter$1.doFilter(HttpServletFilter.java:76)
	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:160)
	at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:166)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
	at jenkins.ErrorAttributeFilter.doFilter(ErrorAttributeFilter.java:29)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
	at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:160)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:94)
	at jenkins.security.AcegiSecurityExceptionFilter.doFilter(AcegiSecurityExceptionFilter.java:52)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
	at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:54)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:126)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:120)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:100)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
	at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:110)
	at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:101)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:227)
	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:221)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
	at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:97)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:117)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
	at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:63)
	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
	at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:111)
	at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:172)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
	at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:53)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
	at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:86)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
	at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
	at jenkins.security.SuspiciousRequestFilter.doFilter(SuspiciousRequestFilter.java:38)
	at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:527)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:131)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:569)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:223)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1570)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1384)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1543)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1306)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)
	at org.eclipse.jetty.server.Server.handle(Server.java:563)
	at org.eclipse.jetty.server.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1598)
	at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:753)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:501)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:287)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)
	at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:969)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1194)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1149)
	at java.base/java.lang.Thread.run(Thread.java:840)

I’ve tried to find something related to that issue in the google, but without luck. Tried clearing session cache, incognito mode, different browser.
Do you know what would fix the problem or what causes it?

Jenkins setup:
Jenkins: 2.426.3
OS: Linux - 5.10.0-23-amd64
Java: 17.0.10 - Debian (OpenJDK 64-Bit Server VM)

ace-editor:1.1
analysis-core:1.96
analysis-model-api:11.15.0
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_
bitbucket:223.vd12f2bca5430
bitbucket-build-status-notifier:1.4.2
bitbucket-filter-project-trait:1.0
bitbucket-oauth:0.13
blueocean:1.27.5.1
blueocean-autofavorite:1.2.5
blueocean-bitbucket-pipeline:1.27.5.1
blueocean-commons:1.27.5.1
blueocean-config:1.27.5.1
blueocean-core-js:1.27.5.1
blueocean-dashboard:1.27.5.1
blueocean-display-url:2.4.2
blueocean-events:1.27.5.1
blueocean-git-pipeline:1.27.5.1
blueocean-github-pipeline:1.27.5.1
blueocean-i18n:1.27.5.1
blueocean-jira:1.27.5.1
blueocean-jwt:1.27.5.1
blueocean-personalization:1.27.5.1
blueocean-pipeline-api-impl:1.27.5.1
blueocean-pipeline-editor:1.27.5.1
blueocean-pipeline-scm-api:1.27.5.1
blueocean-rest:1.27.5.1
blueocean-rest-impl:1.27.5.1
blueocean-web:1.27.5.1
bootstrap4-api:4.6.0-6
bootstrap5-api:5.3.2-3
bouncycastle-api:2.30.1.77-225.v26ea_c9455fd9
branch-api:2.1128.v717130d4f816
build-timeout:1.31
caffeine-api:3.1.8-133.v17b_1ff2e0599
checks-api:2.0.2
checkstyle:4.0.0
cloudbees-bitbucket-branch-source:856.v04c46c86f911
cloudbees-folder:6.858.v898218f3609d
clover:4.14.1.577.vb_ff5a_f69b_37b_
cloverphp:0.6
code-coverage-api:4.99.0
command-launcher:107.v773860566e2e
commons-lang3-api:3.13.0-62.v7d18e55f51e2
commons-text-api:1.11.0-94.v3e1f4a_926e49
coverage:1.10.0
credentials:1319.v7eb_51b_3a_c97b_
credentials-binding:642.v737c34dea_6c2
data-tables-api:1.13.6-5
display-url-api:2.200.vb_9327d658781
docker-commons:439.va_3cb_0a_6a_fb_29
docker-workflow:572.v950f58993843
durable-task:550.v0930093c4b_a_6
echarts-api:5.4.0-7
email-ext:2.104
favorite:2.4.3
font-awesome-api:6.5.1-2
forensics-api:2.3.0
generic-webhook-trigger:2.0.0
git:5.2.1
git-client:4.6.0
git-server:114.v068a_c7cc2574
github:1.37.3.1
github-api:1.318-461.v7a_c09c9fa_d63
github-branch-source:1771.v59b_6a_fa_1b_89e
gradle:2.10
handlebars:3.0.8
handy-uri-templates-2-api:2.1.8-22.v77d5b_75e6953
htmlpublisher:1.32
instance-identity:185.v303dc7c645f9
ionicons-api:56.v1b_1c8c49374e
jackson2-api:2.15.3-363.v82c51b_de9f60
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:1.27.5.1
jersey2-api:2.40-1
jira:3.12
jjwt-api:0.11.5-77.v646c772fddb_0
job-dsl:1.87
jquery-detached:1.2.1
jquery3-api:3.7.1-1
jsch:0.2.16-86.v42e010d9484b_
junit:1259.v65ffcef24a_88
ldap:711.vb_d1a_491714dc
lockable-resources:1240.v43673a_a_7944a_
mailer:463.vedf8358e006b_
mapdb-api:1.0.9-28.vf251ce40855d
matrix-auth:3.2.1
matrix-project:818.v7eb_e657db_924
maven-plugin:3.23
mercurial:1260.vdfb_723cdcc81
mina-sshd-api-common:2.12.0-90.v9f7fb_9fa_3d3b_
mina-sshd-api-core:2.12.0-90.v9f7fb_9fa_3d3b_
momentjs:1.1.1
multiple-scms:0.8
okhttp-api:4.11.0-172.vda_da_1feeb_c6e
pam-auth:1.10
pipeline-build-step:540.vb_e8849e1a_b_d8
pipeline-github-lib:42.v0739460cda_c4
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:2.2150.v4cfd8916915c
pipeline-model-declarative-agent:1.1.1
pipeline-model-definition:2.2150.v4cfd8916915c
pipeline-model-extensions:2.2150.v4cfd8916915c
pipeline-rest-api:2.34
pipeline-stage-step:305.ve96d0205c1c6
pipeline-stage-tags-metadata:2.2150.v4cfd8916915c
pipeline-stage-view:2.34
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
prism-api:1.29.0-8
pubsub-light:1.18
resource-disposer:0.23
scm-api:676.v886669a_199a_a_
script-security:1326.vdb_c154de8669
snakeyaml-api:2.2-111.vc6598e30cc65
sse-gateway:1.26
ssh-credentials:308.ve4497b_ccd8f4
ssh-slaves:2.948.vb_8050d697fec
sshd:3.322.v159e91f6a_550
structs:325.vcb_307d2a_2782
subversion:2.17.3
timestamper:1.26
token-macro:384.vf35b_f26814ec
trilead-api:2.84.v72119de229b_7
variant:60.v7290fc0eb_b_cd
violation-comments-to-stash:1.132
warnings-ng:10.7.0
workflow-aggregator:596.v8c21c963d92d
workflow-api:1291.v51fd2a_625da_7
workflow-basic-steps:1042.ve7b_140c4a_e0c
workflow-cps:3837.v305192405b_c0
workflow-cps-global-lib:609.vd95673f149b_b
workflow-durable-task-step:1331.vc8c2fed35334
workflow-job:1326.ve643e00e9220
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

2

Hello and welcome to this community, @whoisnobody . :wave:

The error message you’re seeing, org.eclipse.jetty.http.BadMessageException: 500: Response header too large, seems to indicate that the size of the HTTP response header is exceeding the limit set by the Jetty server that Jenkins is using. :person_shrugging:

This can happen when you’re trying to serve a large file or a file with a lot of metadata, which seems to be the case with your code coverage reports.

The HTML Publisher plugin, which you’re using to publish the reports, might be adding a lot of metadata to the HTTP response header, causing it to exceed the limit. :thinking:

One way to resolve this issue is to increase the size limit of the HTTP response header in the Jetty server settings.
However, this would require you to have access to the server configuration, which might not be possible if you’re not the Jenkins administrator.

Another possible solution is to reduce the size of the code coverage reports or the amount of metadata they contain. You could try generating more concise reports or splitting them into smaller parts.

If none of these solutions work, you might want to consider using a different method to publish the code coverage reports.
For example, you could use the Jenkins Cobertura plugin, which is specifically designed for publishing code coverage reports and might handle large reports better than the HTML Publisher plugin. :crossed_fingers: