CI Cannot Install Ant

Summary

Since June 5th 2025 all builds on Jenkins started failing, unable to download and install Ant.

Steps to reproduce

Run the build:

• https://ci.eclipse.org/glassfish/job/glassfish_build-and-test-using-jenkinsfile/job/PR-25540/ (tools) - here I tried to use different way, at least it printed something, see below.
• https://ci.eclipse.org/glassfish/job/glassfish_build-and-test-using-jenkinsfile/job/PR-25538/ (withAnt)

What is the current bug behavior?

The original option fails without any log, the PR-25540 fails with a stacktrace:

hudson.remoting.ProxyException: java.net.SocketTimeoutException: Connect timed out
	at java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(NioSocketImpl.java:558)
	at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:609)
	at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)
	at java.base/java.net.Socket.connect(Socket.java:633)
	at java.base/sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:304)
	at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:178)
	at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:533)
	at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:638)
	at java.base/sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:266)
	at java.base/sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:380)
	at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:193)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1257)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1143)
	at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:179)
	at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:142)
	at hudson.FilePath.installIfNecessaryFrom(FilePath.java:973)
Also:   org.jenkinsci.plugins.workflow.actions.ErrorAction$ErrorId: 70ba6de1-ee98-4e6c-b37c-e0322cb61d6c
Caused: hudson.remoting.ProxyException: java.io.IOException: Failed to install https://archive.apache.org/dist/ant/binaries/apache-ant-1.10.15-bin.zip to /home/jenkins/agent/tools/hudson.tasks.Ant_AntInstallation/apache-ant-latest
	at hudson.FilePath.installIfNecessaryFrom(FilePath.java:1058)
	at hudson.FilePath.installIfNecessaryFrom(FilePath.java:954)
	at hudson.tools.DownloadFromUrlInstaller.performInstallation(DownloadFromUrlInstaller.java:77)
	at hudson.tools.InstallerTranslator.getToolHome(InstallerTranslator.java:67)
	at hudson.tools.ToolLocationNodeProperty.getToolHome(ToolLocationNodeProperty.java:109)
	at hudson.tools.ToolInstallation.translateFor(ToolInstallation.java:221)
	at PluginClassLoader for ant//hudson.tasks.Ant$AntInstallation.forNode(Ant.java:440)
	at PluginClassLoader for ant//hudson.tasks.Ant$AntInstallation.forNode(Ant.java:352)
	at PluginClassLoader for workflow-basic-steps//org.jenkinsci.plugins.workflow.steps.ToolStep$Execution.run(ToolStep.java:157)
	at PluginClassLoader for workflow-basic-steps//org.jenkinsci.plugins.workflow.steps.ToolStep$Execution.run(ToolStep.java:138)
	at PluginClassLoader for workflow-step-api//org.jenkinsci.plugins.workflow.steps.SynchronousNonBlockingStepExecution.lambda$start$0(SynchronousNonBlockingStepExecution.java:49)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:853)

It seems to me that the original withAnt usage is even completely ignored - the whole withAnt block is missing in the output. Could it be a Jenkins bug?:

What is the expected correct behavior?

Install Ant and run our old tests based on Ant.

Priority

• Urgent
• High
• Medium
• Low

Severity

• Blocker
• Major
• Normal
• Low

Impact

We are unable to build and merge anything running these tests.