"Algorithm negotiation fail" error while creating tags on Jenkins using Bitbucket server
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要約
While creating tags on the Bitbucket server, we see the "Algorithm negotiation fail" message in the Jenkins build logs.
環境
Bitbucket server 8.x onwards
Jenkins
診断
The Jenkins Build Console logs have the below:
03:22:56 Buildfile: /pso-jenkins/deployer/sd-client/git-tasks.xml
03:22:56
03:22:56 create-tag:
03:22:56 [create-tag] Taging EXEL/WM-2017/PHASE1/SDN/SDN1154 Started...
03:22:56 [create-tag] /apps/scope/pso-jenkins-ws/workspace/EXEL-WM2017-PHASE1-SDN/SCPP_base_Base
03:22:58
03:22:58 BUILD FAILED
03:22:58 /pso-jenkins/deployer/sd-client/git-tasks.xml:19: org.eclipse.jgit.api.errors.TransportException: ssh://git@atlgit-01.us.manh.com:7999/soscpp/base.git: Algorithm negotiation fail
03:22:58 at org.eclipse.jgit.api.PushCommand.call(PushCommand.java:160)
03:22:58 at com.manh.pso.ci.git.GitHelper.tagRepository(GitHelper.java:31)
03:22:58 at com.manh.pso.ci.tasks.CreateTag.execute(CreateTag.java:26)
03:22:58 at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
03:22:58 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
03:22:58 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
03:22:58 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
03:22:58 at java.lang.reflect.Method.invoke(Method.java:498)
03:22:58 at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
03:22:58 at org.apache.tools.ant.Task.perform(Task.java:348)
03:22:58 at org.apache.tools.ant.Target.execute(Target.java:435)
03:22:58 at org.apache.tools.ant.Target.performTasks(Target.java:456)
03:22:58 at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
03:22:58 at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
03:22:58 at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
03:22:58 at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
03:22:58 at org.apache.tools.ant.Main.runBuild(Main.java:851)
03:22:58 at org.apache.tools.ant.Main.startAnt(Main.java:235)
03:22:58 at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
03:22:58 at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
03:22:58 Caused by: org.eclipse.jgit.errors.TransportException: ssh://git@atlgit-01.us.manh.com:7999/soscpp/base.git: Algorithm negotiation fail
03:22:58 at org.eclipse.jgit.transport.JschConfigSessionFactory.getSession(JschConfigSessionFactory.java:142)
03:22:58 at org.eclipse.jgit.transport.SshTransport.getSession(SshTransport.java:121)
03:22:58 at org.eclipse.jgit.transport.TransportGitSsh$SshPushConnection.<init>(TransportGitSsh.java:306)
03:22:58 at org.eclipse.jgit.transport.TransportGitSsh.openPush(TransportGitSsh.java:152)
03:22:58 at org.eclipse.jgit.transport.PushProcess.execute(PushProcess.java:154)
03:22:58 at org.eclipse.jgit.transport.Transport.push(Transport.java:1173)
03:22:58 at org.eclipse.jgit.api.PushCommand.call(PushCommand.java:156)
03:22:58 ... 19 more
03:22:58 Caused by: com.jcraft.jsch.JSchException: Algorithm negotiation fail
03:22:58 at com.jcraft.jsch.Session.receive_kexinit(Session.java:582)
03:22:58 at com.jcraft.jsch.Session.connect(Session.java:320)
03:22:58 at org.eclipse.jgit.transport.JschConfigSessionFactory.getSession(JschConfigSessionFactory.java:116)原因
The setting of plugin.ssh.dhgex.allow-sha1=true in bitbucket.properties would allow the sha1 keys on the Bitbucket side. The default was changed in Bitbucket 8.x to false.
ソリューション
Specify plugin.ssh.dhgex.allow-sha1=true in your <Bitbucket-home>/shared/bitbucket.properties file. You'll have to restart Bitbucket for this to take effect.
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