AW: ALPN callback dropped: SPDY and HTTP/2 are disabled. Is alpn-boot on the boot class path?

[Reinhold Fuereder]

Hi Thor,

 

The stacktrace ("java.net.UnknownHostException: .slack.com: Name or service not known ") seems to indicate a bad host name or url?

 

HTH Reinhold

 

 

Von: jenkins...@googlegroups.com [mailto:jenkins...@googlegroups.com] Im Auftrag von Thor Waway
Gesendet: Donnerstag, 19. Oktober 2017 01:00
An: Jenkins Users
Betreff: ALPN callback dropped: SPDY and HTTP/2 are disabled. Is alpn-boot on the boot class path?

 

Hello, 

 

While attempting to integrate the Slack Plugin, I keep the above error. Checked issues for this plugin on Github and JIRA but haven't found any open issues. Decided to try posting here first before reporting.  

 

 

Here is the full output of Jenkins Log: 

Oct 18, 2017 10:40:30 PM INFO org.eclipse.jetty.server.handler.ContextHandler doStart

Started w.@68c9d179{/,file:///var/cache/jenkins/war/,AVAILABLE}{/var/cache/jenkins/war}

Oct 18, 2017 10:40:30 PM INFO org.eclipse.jetty.util.ssl.SslContextFactory load

x509=X509@5884a914(jester.gashiandkinks.com,h=[jester.gashiandkinks.com],w=[]) for SslContextFactory@50378a4(null,null)

Oct 18, 2017 10:40:31 PM INFO org.eclipse.jetty.server.AbstractConnector doStart

Started ServerConnector@660acfb{SSL,[ssl, http/1.1]}{0.0.0.0:8443}

Oct 18, 2017 10:40:31 PM INFO org.eclipse.jetty.server.Server doStart

Started @2639ms

Oct 18, 2017 10:40:31 PM INFO winstone.Logger logInternal

Winstone Servlet Engine v4.0 running: controlPort=disabled

Oct 18, 2017 10:40:31 PM INFO jenkins.InitReactorRunner$1 onAttained

Started initialization

Oct 18, 2017 10:40:32 PM INFO jenkins.InitReactorRunner$1 onAttained

Listed all plugins

Oct 18, 2017 10:40:39 PM INFO jenkins.InitReactorRunner$1 onAttained

Prepared all plugins

Oct 18, 2017 10:40:39 PM INFO jenkins.InitReactorRunner$1 onAttained

Started all plugins

Oct 18, 2017 10:40:41 PM INFO hudson.ExtensionFinder$GuiceFinder$FaultTolerantScope$1 error

Failed to instantiate optional component hudson.plugins.build_timeout.operations.AbortAndRestartOperation$DescriptorImpl; skipping

Oct 18, 2017 10:40:42 PM INFO jenkins.InitReactorRunner$1 onAttained

Augmented all extensions

Oct 18, 2017 10:40:42 PM INFO hudson.slaves.SlaveComputer tryReconnect

Attempting to reconnect node-00

Oct 18, 2017 10:40:43 PM INFO jenkins.InitReactorRunner$1 onAttained

Loaded all jobs

Oct 18, 2017 10:40:43 PM INFO hudson.model.AsyncPeriodicWork$1 run

Started Download metadata

Oct 18, 2017 10:40:43 PM INFO hudson.model.AsyncPeriodicWork$1 run

Finished Download metadata. 13 ms

Oct 18, 2017 10:40:43 PM INFO jenkins.InitReactorRunner$1 onAttained

Completed initialization

Oct 18, 2017 10:40:44 PM INFO org.springframework.context.support.AbstractApplicationContext prepareRefresh

Refreshing org.springframework.web.context.support.StaticWebApplicationContext@420407ea: display name [Root WebApplicationContext]; startup date [Wed Oct 18 22:40:44 UTC 2017]; root of context hierarchy

Oct 18, 2017 10:40:44 PM INFO org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory

Bean factory for application context [org.springframework.web.context.support.StaticWebApplicationContext@420407ea]: org.springframework.beans.factory.support.DefaultListableBeanFactory@5552a174

Oct 18, 2017 10:40:44 PM INFO org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons

Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@5552a174: defining beans [filter,legacy]; root of factory hierarchy

Oct 18, 2017 10:40:44 PM INFO jenkins.plugins.slack.SlackNotifier$Migrator onLoaded

Starting Settings Migration Process

Oct 18, 2017 10:40:44 PM INFO jenkins.plugins.slack.SlackNotifier$Migrator onLoaded

Skipping job "GashiandKinks" with type jenkins.branch.OrganizationFolder

Oct 18, 2017 10:40:44 PM INFO jenkins.plugins.slack.SlackNotifier$Migrator onLoaded

Skipping job "GK-Front" with type org.jenkinsci.plugins.workflow.multibranch.WorkflowMultiBranchProject

Oct 18, 2017 10:40:44 PM INFO jenkins.plugins.slack.config.JobConfigMigrator migrate

Migrating job "feature-jenkinsfile" with type org.jenkinsci.plugins.workflow.job.WorkflowJob

Oct 18, 2017 10:40:44 PM INFO jenkins.plugins.slack.SlackNotifier$Migrator onLoaded

Completed Settings Migration Process

Oct 18, 2017 10:40:44 PM INFO hudson.WebAppMain$3 run

Jenkins is fully up and running

Oct 18, 2017 10:42:57 PM INFO com.squareup.okhttp.internal.Platform$JdkWithJettyBootPlatform getSelectedProtocol

ALPN callback dropped: SPDY and HTTP/2 are disabled. Is alpn-boot on the boot class path?

Oct 18, 2017 10:42:58 PM INFO com.squareup.okhttp.internal.Platform$JdkWithJettyBootPlatform getSelectedProtocol

ALPN callback dropped: SPDY and HTTP/2 are disabled. Is alpn-boot on the boot class path?

Oct 18, 2017 10:43:08 PM INFO com.squareup.okhttp.internal.Platform$JdkWithJettyBootPlatform getSelectedProtocol

ALPN callback dropped: SPDY and HTTP/2 are disabled. Is alpn-boot on the boot class path?

Oct 18, 2017 10:43:32 PM WARNING jenkins.plugins.slack.StandardSlackService publish

Error posting to Slack
java.net.UnknownHostException: .slack.com: Name or service not known
        at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
        at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
        at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
        at java.net.InetAddress.getAllByName0(InetAddress.java:1276)
        at java.net.InetAddress.getAllByName(InetAddress.java:1192)
        at java.net.InetAddress.getAllByName(InetAddress.java:1126)
        at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:44)
        at org.apache.http.impl.conn.HttpClientConnectionOperator.connect(HttpClientConnectionOperator.java:102)
        at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:314)
        at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:363)
        at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:219)
        at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:195)
        at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:85)
        at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:108)
        at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:186)
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106)
        at jenkins.plugins.slack.StandardSlackService.publish(StandardSlackService.java:136)
        at jenkins.plugins.slack.StandardSlackService.publish(StandardSlackService.java:95)
        at jenkins.plugins.slack.workflow.SlackSendStep$SlackSendStepExecution.run(SlackSendStep.java:258)
        at jenkins.plugins.slack.workflow.SlackSendStep$SlackSendStepExecution.run(SlackSendStep.java:189)
        at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousNonBlockingStepExecution$1$1.call(AbstractSynchronousNonBlockingStepExecution.java:47)
        at hudson.security.ACL.impersonate(ACL.java:260)
        at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousNonBlockingStepExecution$1.run(AbstractSynchronousNonBlockingStepExecution.java:44)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)

Oct 18, 2017 10:43:33 PM INFO org.jenkinsci.plugins.workflow.job.WorkflowRun finish

GashiandKinks/GK-Front/feature-jenkinsfile #64 completed: SUCCESS

Oct 18, 2017 10:43:33 PM INFO com.squareup.okhttp.internal.Platform$JdkWithJettyBootPlatform getSelectedProtocol

ALPN callback dropped: SPDY and HTTP/2 are disabled. Is alpn-boot on the boot class path?

 

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