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Type: Bug
Resolution: Fixed
Priority: Major
Component/s: github-branch-source-plugin
Labels:
None
Environment:
github-branch-source:1696.v3a_7603564d04

Similar Issues:

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Released As:
github-branch-source:1728.v859147241f49

When using GitHub Branch Source with a Jenkins Proxy configuration, if the IP of the proxy server changes GitHub Branch Source still uses the previous IP.

This has been reproduced in Kubernetes with a squid proxy deployment and service deployed in k8s.

Set the Jenkins proxy to the Kubernetes Service DNS of the proxy and port
Then I do the following:

build a multibranch job and wait for it to complete (retrieve the Jenkinsfile and does a checkout)
delete the squid proxy pods and service
recreate the squid service
build the same multibranch job

We see a SocketTimeoutException.

java.net.SocketTimeoutException: connect timed out
	at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:412)
	at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:255)
	at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:237)
	at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.base/java.net.Socket.connect(Socket.java:609)
	at okhttp3.internal.platform.Platform.connectSocket(Platform.kt:128)
	at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.kt:295)
	at okhttp3.internal.connection.RealConnection.connectTunnel(RealConnection.kt:261)
	at okhttp3.internal.connection.RealConnection.connect(RealConnection.kt:201)
	at okhttp3.internal.connection.ExchangeFinder.findConnection(ExchangeFinder.kt:226)
	at okhttp3.internal.connection.ExchangeFinder.findHealthyConnection(ExchangeFinder.kt:106)
	at okhttp3.internal.connection.ExchangeFinder.find(ExchangeFinder.kt:74)
	at okhttp3.internal.connection.RealCall.initExchange$okhttp(RealCall.kt:255)
	at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.kt:32)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
	at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.kt:95)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
	at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.kt:83)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
	at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.kt:76)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
	at org.kohsuke.github.extras.okhttp3.ObsoleteUrlFactory$UnexpectedException.lambda$static$0(ObsoleteUrlFactory.java:1365)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
	at okhttp3.internal.connection.RealCall.getResponseWithInterceptorChain$okhttp(RealCall.kt:201)
	at okhttp3.internal.connection.RealCall.execute(RealCall.kt:154)
	at org.kohsuke.github.extras.okhttp3.ObsoleteUrlFactory$OkHttpURLConnection.getResponse(ObsoleteUrlFactory.java:671)
	at org.kohsuke.github.extras.okhttp3.ObsoleteUrlFactory$OkHttpURLConnection.getResponseCode(ObsoleteUrlFactory.java:702)
	at org.kohsuke.github.extras.okhttp3.ObsoleteUrlFactory$DelegatingHttpsURLConnection.getResponseCode(ObsoleteUrlFactory.java:1064)
	at org.kohsuke.github.internal.GitHubConnectorHttpConnectorAdapter.send(GitHubConnectorHttpConnectorAdapter.java:87)
	at org.kohsuke.github.GitHubClient.sendRequest(GitHubClient.java:384)
Caused: org.kohsuke.github.HttpException: Server returned HTTP response code: -1, message: 'null' for URL: https://api.github.com/
	at org.kohsuke.github.GitHubClient.interpretApiError(GitHubClient.java:548)
	at org.kohsuke.github.GitHubClient.sendRequest(GitHubClient.java:399)
	at org.kohsuke.github.GitHubClient.fetch(GitHubClient.java:121)
	at org.kohsuke.github.GitHubClient.checkApiUrlValidity(GitHubClient.java:323)
	at org.kohsuke.github.GitHub.checkApiUrlValidity(GitHub.java:1244)
	at org.jenkinsci.plugins.github_branch_source.ApiRateLimitChecker.verifyConnection(ApiRateLimitChecker.java:199)
	at org.jenkinsci.plugins.github_branch_source.Connector$GitHubConnection.verifyConnection(Connector.java:794)
	at org.jenkinsci.plugins.github_branch_source.Connector.connect(Connector.java:447)
	at org.jenkinsci.plugins.github_branch_source.GitHubSCMSource.retrieve(GitHubSCMSource.java:1679)
	at jenkins.scm.api.SCMSource.fetch(SCMSource.java:582)
	at org.jenkinsci.plugins.workflow.multibranch.SCMBinder.create(SCMBinder.java:101)
	at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:311)
	at hudson.model.ResourceController.execute(ResourceController.java:107)
	at hudson.model.Executor.run(Executor.java:449)

Restarting the controller fixes this.

Notes: this is reproducible whether the okhttp disk cache is disabled with org.jenkinsci.plugins.github_branch_source.GitHubSCMSource.cacheSize=0 or not.