SQLDeveloper SSH Connection to CentOS server Fails - com.jcraft.jsch.JSchException: Algorithm negotiation fail
(Doc ID 2383087.1)
Last updated on FEBRUARY 27, 2025
Applies to:
Oracle Database Exadata Express Cloud Service - Version N/A and laterOracle Database Cloud Schema Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
Attempting to setup an SSH connection in SQL Developer to a CentOS 7 server in order to proxy a SQL connection through it fails with the following error.
Example
com.jcraft.jsch.JSchException: Algorithm negotiation fail
at com.jcraft.jsch.Session.receive_kexinit(Session.java:583)
at com.jcraft.jsch.Session.connect(Session.java:320)
at com.jcraft.jsch.Session.connect(Session.java:183)
at oracle.dbtools.raptor.ssh.core.Client.testConnection(Client.java:376)
at oracle.dbtools.raptor.ssh.navigator.SshController.handleEvent(SshController.java:126)
at oracle.dbtools.raptor.navigator.core.NavigatorWindow$3.handleEvent(NavigatorWindow.java:388)
at oracle.ide.controller.IdeAction.performAction(IdeAction.java:663)
at oracle.ide.controller.IdeAction.actionPerformedImpl(IdeAction.java:1159)
at oracle.ide.controller.IdeAction.actionPerformed(IdeAction.java:618)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
at java.awt.Component.processMouseEvent(Component.java:6533)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at com.jcraft.jsch.Session.receive_kexinit(Session.java:583)
at com.jcraft.jsch.Session.connect(Session.java:320)
at com.jcraft.jsch.Session.connect(Session.java:183)
at oracle.dbtools.raptor.ssh.core.Client.testConnection(Client.java:376)
at oracle.dbtools.raptor.ssh.navigator.SshController.handleEvent(SshController.java:126)
at oracle.dbtools.raptor.navigator.core.NavigatorWindow$3.handleEvent(NavigatorWindow.java:388)
at oracle.ide.controller.IdeAction.performAction(IdeAction.java:663)
at oracle.ide.controller.IdeAction.actionPerformedImpl(IdeAction.java:1159)
at oracle.ide.controller.IdeAction.actionPerformed(IdeAction.java:618)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
at java.awt.Component.processMouseEvent(Component.java:6533)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
Changes
Cause
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In this Document
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| Cause |
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| References |