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    Ant scp task has an attribute called trust. If set to false (default) the host you connect to has to be set in the knownhosts file (you might have to create it) Another way is to explicitly set "trust = true". Check the documentation:

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via Jenkins JIRA by Evgeny Persienko, 1 year ago
via Jenkins JIRA by Evgeny Persienko, 1 year ago
via by Unknown author, 1 year ago
via Stack Overflow by Ehsan Enayati
, 2 years ago
Algorithm negotiation fail
com.jcraft.jsch.JSchException: Algorithm negotiation fail	at com.jcraft.jsch.Session.receive_kexinit(	at com.jcraft.jsch.Session.connect(	at com.jcraft.jsch.Session.connect(	at org.jvnet.hudson.plugins.SSHSite.createSession(	at org.jvnet.hudson.plugins.SSHSite.executeCommand(	at org.jvnet.hudson.plugins.SSHBuilder.perform(	at hudson.tasks.BuildStepMonitor$1.perform(	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(	at hudson.model.Build$	at hudson.model.Build$BuildExecution.doRun(	at hudson.model.AbstractBuild$	at hudson.model.Run.execute(	at	at hudson.model.ResourceController.execute(	at