Sep 09, 2025 2:02:36 PM hudson.plugins.ec2.EC2Cloud INFO: Launching instance: i-0e3a65ba44d58a9c1 Sep 09, 2025 2:02:36 PM hudson.plugins.ec2.EC2Cloud INFO: bootstrap() Sep 09, 2025 2:02:36 PM hudson.plugins.ec2.EC2Cloud INFO: Getting keypair... Sep 09, 2025 2:02:36 PM hudson.plugins.ec2.EC2Cloud INFO: Using private key remora_build_rsa (SHA-1 fingerprint 50:c8:69:19:3e:02:aa:4d:bf:f2:b3:21:0a:fd:d3:fe:e4:30:d2:43) Sep 09, 2025 2:02:36 PM hudson.plugins.ec2.EC2Cloud INFO: Authenticating as ubuntu Sep 09, 2025 2:02:36 PM hudson.plugins.ec2.EC2Cloud INFO: Connecting to 10.2.1.59 on port 22, with timeout 10000. Sep 09, 2025 2:02:52 PM hudson.plugins.ec2.EC2Cloud INFO: Failed to connect via ssh: DefaultConnectFuture[ubuntu@/10.2.1.59:22]: Failed (ConnectException) to execute: Connection refused Sep 09, 2025 2:02:52 PM hudson.plugins.ec2.EC2Cloud INFO: Waiting for SSH to come up. Sleeping 5. Sep 09, 2025 2:02:57 PM hudson.plugins.ec2.EC2Cloud INFO: Connecting to 10.2.1.59 on port 22, with timeout 10000. Sep 09, 2025 2:02:57 PM hudson.plugins.ec2.EC2Cloud INFO: Connected via SSH. Sep 09, 2025 2:02:58 PM hudson.plugins.ec2.EC2Cloud INFO: The SSH key EC 1e:a8:aa:da:ef:b2:73:56:cf:56:df:38:39:9c:27:50 has been automatically trusted for connections to EC2 (v12 Build) - Ubuntu Build Agent (i-0e3a65ba44d58a9c1) Sep 09, 2025 2:02:58 PM hudson.plugins.ec2.EC2Cloud INFO: SSH service responded. Waiting 240000ms for service to stabilize Sep 09, 2025 2:06:58 PM hudson.plugins.ec2.EC2Cloud INFO: SSH service should have stabilized Sep 09, 2025 2:06:58 PM hudson.plugins.ec2.EC2Cloud INFO: connect fresh as root Sep 09, 2025 2:06:58 PM hudson.plugins.ec2.EC2Cloud INFO: Connecting to 10.2.1.59 on port 22, with timeout 10000. Sep 09, 2025 2:06:58 PM hudson.plugins.ec2.EC2Cloud INFO: Connected via SSH. Sep 09, 2025 2:06:58 PM hudson.plugins.ec2.EC2Cloud INFO: Connection allowed after the host key has been verified Sep 09, 2025 2:06:59 PM hudson.plugins.ec2.EC2Cloud INFO: Creating tmp directory (/tmp) if it does not exist Sep 09, 2025 2:07:00 PM hudson.plugins.ec2.EC2Cloud INFO: Verifying: /usr/bin/java -fullversion openjdk full version "21.0.8+9-Ubuntu-0ubuntu124.04.1" Sep 09, 2025 2:07:00 PM hudson.plugins.ec2.EC2Cloud INFO: Verifying: which scp /usr/bin/scp Sep 09, 2025 2:07:00 PM hudson.plugins.ec2.EC2Cloud INFO: Copying remoting.jar to: /tmp Sep 09, 2025 2:07:00 PM hudson.plugins.ec2.EC2Cloud INFO: Launching remoting agent (via SSH client process): ssh -o StrictHostKeyChecking=accept-new -o "UserKnownHostsFile=/tmp/ec2_7262774302005659660_known_hosts" -o "HostKeyAlgorithms=EC" -i /tmp/ec2_8472504361240753226.pem ubuntu@10.2.1.59 -p 22 /usr/bin/java -jar /tmp/remoting.jar -workDir /var/jenkins [09/09/25 14:07:00] Launching agent $ ssh -o StrictHostKeyChecking=accept-new -o "UserKnownHostsFile=/tmp/ec2_7262774302005659660_known_hosts" -o "HostKeyAlgorithms=EC" -i /tmp/ec2_8472504361240753226.pem ubuntu@10.2.1.59 -p 22 /usr/bin/java -jar /tmp/remoting.jar -workDir /var/jenkins command-line line 0: Bad key types 'EC'. ERROR: Unable to launch the agent for EC2 (v12 Build) - Ubuntu Build Agent (i-0e3a65ba44d58a9c1) Also: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:445) at java.base/java.io.OutputStream.write(OutputStream.java:162) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/java.io.FilterOutputStream.flush(FilterOutputStream.java:153) at hudson.remoting.BinarySafeStream$2.flush(BinarySafeStream.java:324) at java.base/java.io.ObjectOutputStream$BlockDataOutputStream.flush(ObjectOutputStream.java:1832) at java.base/java.io.ObjectOutputStream.flush(ObjectOutputStream.java:724) at hudson.remoting.Capability$ObjectOutputStreamImpl.close(Capability.java:162) at hudson.remoting.Capability.write(Capability.java:149) java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:445) at java.base/java.io.OutputStream.write(OutputStream.java:162) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/java.io.FilterOutputStream.flush(FilterOutputStream.java:153) at hudson.remoting.BinarySafeStream$2.flush(BinarySafeStream.java:324) at java.base/java.io.ObjectOutputStream$BlockDataOutputStream.flush(ObjectOutputStream.java:1832) at java.base/java.io.ObjectOutputStream.flush(ObjectOutputStream.java:724) at hudson.remoting.Capability.write(Capability.java:151) at hudson.remoting.Capability.writePreamble(Capability.java:142) at hudson.remoting.ChannelBuilder.negotiate(ChannelBuilder.java:470) at hudson.remoting.ChannelBuilder.build(ChannelBuilder.java:437) at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:440) at PluginClassLoader for command-launcher//hudson.slaves.CommandLauncher.launch(CommandLauncher.java:188) at PluginClassLoader for ec2//hudson.plugins.ec2.ssh.EC2UnixLauncher.launchScript(EC2UnixLauncher.java:280) at PluginClassLoader for ec2//hudson.plugins.ec2.EC2ComputerLauncher.launch(EC2ComputerLauncher.java:55) at hudson.slaves.SlaveComputer.lambda$_connect$0(SlaveComputer.java:297) at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46) at jenkins.security.ImpersonatingExecutorService$2.call(ImpersonatingExecutorService.java:80) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) at java.base/java.lang.Thread.run(Thread.java:840) ERROR: Process terminated with exit code 255