java.lang.AssertionError: 

Expected: an empty iterable
     but: [<jenkins.plugins.openstack.compute.JCloudsComputer@419e8d09>]
	at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)
	at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:6)
	at jenkins.plugins.openstack.compute.SingleUseSlaveTest.verifyOneOffContract(SingleUseSlaveTest.java:149)
	at jenkins.plugins.openstack.compute.SingleUseSlaveTest.discardSlaveImmediatelyDespiteOfInstanceMinRequirement(SingleUseSlaveTest.java:131)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at jenkins.plugins.openstack.PluginTestRule$3.evaluate(PluginTestRule.java:621)
	at org.jvnet.hudson.test.JenkinsRule$1.evaluate(JenkinsRule.java:648)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
	at java.base/java.lang.Thread.run(Thread.java:1583)

0.088 [id=303]	INFO	o.jvnet.hudson.test.JenkinsRule#createWebServer2: Running on http://localhost:43557/jenkins/
   0.189 [id=303]	INFO	jenkins.model.Jenkins#<init>: Starting version 2.504.1
   0.194 [id=316]	INFO	jenkins.InitReactorRunner$1#onAttained: Started initialization
   0.195 [id=318]	INFO	jenkins.InitReactorRunner$1#onAttained: Listed all plugins
   0.196 [id=317]	INFO	j.b.api.BouncyCastlePlugin#start: /home/jenkins/agent/workspace/ns_openstack-cloud-plugin_PR-440/plugin/target/tmp/j h12404561577399181564/plugins/bouncycastle-api/WEB-INF/optional-lib not found; for non RealJenkinsRule this is fine and can be ignored.
   0.316 [id=318]	INFO	jenkins.InitReactorRunner$1#onAttained: Prepared all plugins
   0.318 [id=320]	INFO	jenkins.InitReactorRunner$1#onAttained: Started all plugins
   0.318 [id=315]	INFO	jenkins.InitReactorRunner$1#onAttained: Augmented all extensions
   0.497 [id=320]	INFO	jenkins.InitReactorRunner$1#onAttained: System config loaded
   0.510 [id=315]	INFO	jenkins.InitReactorRunner$1#onAttained: System config adapted
   0.510 [id=320]	INFO	jenkins.InitReactorRunner$1#onAttained: Loaded all jobs
   0.510 [id=316]	INFO	jenkins.InitReactorRunner$1#onAttained: Configuration for all jobs updated
   0.512 [id=316]	INFO	jenkins.InitReactorRunner$1#onAttained: Completed initialization
   0.526 [id=94]	INFO	j.p.o.c.JCloudsSlaveTemplate#provisionServer: Provisioning new openstack server template0-6 with options jenkins.plugins.openstack.compute.SlaveOptions@7604cc0[bootSource=Image dummyImageId,hardwareId=dummyHardwareId,networkId=dummyNetworkId,userDataId=dummyUserDataId,instanceCap=10,instancesMin=1,floatingIpPool=dummyPoolName,securityGroups=default,availabilityZone=dummyAvailabilityZone,startTimeout=600000,keyPairName=dummyKeyPairName,numExecutors=1,jvmOptions=dummyJvmOptions,fsRoot=/tmp/jenkins,launcherFactory=jenkins.plugins.openstack.compute.slaveopts.LauncherFactory$JNLP@1f,nodeProperties=<null>,retentionTime=0,configDrive=false]
   0.526 [id=94]	INFO	j.p.o.c.slaveopts.BootSource#selectIdFromListAndLogProblems: NO Images match name 'dummyImageId'.
   0.529 [id=94]	INFO	j.p.o.c.JCloudsSlaveTemplate#provisionServer: Provisioned: Mock for Object, hashCode: 1487111045
   0.529 [id=94]	INFO	j.p.o.c.JCloudsSlaveTemplate#provisionServer: Amended server: Mock for Object, hashCode: 1487111045
   0.529 [id=94]	INFO	j.p.o.compute.JCloudsSlave#createComputer: Creating a new computer for template0-6
Autolaunching agent for slave: template0-6
template0-6 err: WARNING: The "-jnlpUrl" argument is deprecated. Use "-url" and "-name" instead, potentially also passing in "-webSocket", "-tunnel", and/or work directory options as needed.
   0.904 [id=309]	WARNING	hudson.slaves.SlaveComputer#doJenkinsAgentJnlp: Agent "template0-6" is connecting with the "-jnlpUrl" argument, which is deprecated. Use "-url" and "-name" instead, potentially also passing in "-webSocket", "-tunnel", and/or work directory options as needed.
template0-6 err: Jul 01, 2025 3:24:32 AM hudson.remoting.Launcher createEngine
template0-6 err: INFO: Setting up agent: template0-6
template0-6 err: Jul 01, 2025 3:24:32 AM hudson.remoting.Engine startEngine
template0-6 err: INFO: Using Remoting version: 3301.v4363ddcca_4e7
template0-6 err: Jul 01, 2025 3:24:32 AM org.jenkinsci.remoting.engine.WorkDirManager initializeWorkDir
template0-6 err: INFO: Using /tmp/jenkins/remoting as a remoting work directory
template0-6 err: Jul 01, 2025 3:24:32 AM org.jenkinsci.remoting.engine.WorkDirManager setupLogging
template0-6 err: INFO: Both error and output logs will be printed to /tmp/jenkins/remoting
template0-6 err: Jul 01, 2025 3:24:32 AM hudson.remoting.Launcher$CuiListener status
template0-6 err: INFO: Locating server among [http://localhost:43557/jenkins/]
template0-6 err: Jul 01, 2025 3:24:32 AM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver resolve
template0-6 err: INFO: Remoting server accepts the following protocols: [JNLP4-connect, Ping]
   1.084 [id=347]	INFO	h.TcpSlaveAgentListener$ConnectionHandler#run: Connection #21 from /127.0.0.1:33658 failed: null
template0-6 err: Jul 01, 2025 3:24:32 AM hudson.remoting.Launcher$CuiListener status
template0-6 err: INFO: Agent discovery successful
template0-6 err:   Agent address: localhost
template0-6 err:   Agent port:    46137
template0-6 err:   Identity:      05:94:65:7f:fe:92:3c:ae:aa:c8:80:f1:3e:d4:17:6c
template0-6 err: Jul 01, 2025 3:24:32 AM hudson.remoting.Launcher$CuiListener status
template0-6 err: INFO: Handshaking
template0-6 err: Jul 01, 2025 3:24:32 AM hudson.remoting.Launcher$CuiListener status
template0-6 err: INFO: Connecting to localhost:46137
template0-6 err: Jul 01, 2025 3:24:32 AM hudson.remoting.Launcher$CuiListener status
template0-6 err: INFO: Server reports protocol JNLP4-connect-proxy not supported, skipping
template0-6 err: Jul 01, 2025 3:24:32 AM hudson.remoting.Launcher$CuiListener status
template0-6 err: INFO: Trying protocol: JNLP4-connect
template0-6 err: Jul 01, 2025 3:24:32 AM org.jenkinsci.remoting.protocol.impl.BIONetworkLayer$Reader run
template0-6 err: INFO: Waiting for ProtocolStack to start.
   1.124 [id=348]	INFO	h.TcpSlaveAgentListener$ConnectionHandler#run: Accepted JNLP4-connect connection #22 from /127.0.0.1:33662
template0-6 err: Jul 01, 2025 3:24:33 AM hudson.remoting.Launcher$CuiListener status
template0-6 err: INFO: Remote identity confirmed: 05:94:65:7f:fe:92:3c:ae:aa:c8:80:f1:3e:d4:17:6c
template0-6 err: Jul 01, 2025 3:24:33 AM hudson.remoting.Launcher$CuiListener status
template0-6 err: INFO: Connected
   7.039 [id=341]	INFO	j.p.o.compute.JCloudsComputer#setPendingDelete: Setting template0-6 pending delete status to true
  10.103 [id=303]	INFO	j.s.DefaultJnlpSlaveReceiver#channelClosed: Executing discardSlaveImmediatelyDespiteOfInstanceMinRequirement(jenkins.plugins.openstack.compute.SingleUseSlaveTest) for template0-6 terminated: java.nio.channels.ClosedChannelException
  10.106 [id=303]	INFO	hudson.lifecycle.Lifecycle#onStatusUpdate: Stopping Jenkins
template0-6 err: Jul 01, 2025 3:24:41 AM hudson.remoting.Launcher$CuiListener status
template0-6 err: INFO: Terminated
  10.111 [id=303]	INFO	hudson.lifecycle.Lifecycle#onStatusUpdate: Jenkins stopped
  10.155 [id=303]	INFO	o.j.h.t.TemporaryDirectoryAllocator#dispose: deleting /home/jenkins/agent/workspace/ns_openstack-cloud-plugin_PR-440/plugin/target/tmp/j h12404561577399181564

=== Starting discardSlaveImmediatelyDespiteOfInstanceMinRequirement(jenkins.plugins.openstack.compute.SingleUseSlaveTest)
$ /opt/jdk-21/bin/java -jar -DstartedBy=discardSlaveImmediatelyDespiteOfInstanceMinRequirement(jenkins.plugins.openstack.compute.SingleUseSlaveTest) /home/jenkins/agent/workspace/ns_openstack-cloud-plugin_PR-440@tmp/m2repo/org/jenkins-ci/main/remoting/3301.v4363ddcca_4e7/remoting-3301.v4363ddcca_4e7.jar -jnlpUrl http://localhost:43557/jenkins/computer/template0-6/slave-agent.jnlp