EM 12c: Enterprise Manager 12c Cloud Control Agent Installation on Linux Fails with Error : Algorithm negotiation fail

(Doc ID 2373503.1)

Last updated on MARCH 24, 2018

Applies to:

Enterprise Manager Base Platform - Version 12.1.0.4.0 and later
Information in this document applies to any platform.

Symptoms

Enterprise Manager (EM) 12.1.0.4.0 Cloud Control

Using EM 2.1.0.4 Cloud Control to push an agent out to a new oracle Linux 6 server fails on the first attempt to initialize the connection, with the error in the job output:

SSH connection check failed Connection to the SSH daemon (sshd) on the target host failed with the following error : Algorithm negotiation fail


The SSH daemon on the server is running and the target host can be accessed with ssh.


The following is logged in <OMS instance base>\gc_inst\em\EMGC_OMS1\sysman\agentpush\<date stamp>\applogs\<host name>_deploy.log:

2018-03-13_12-16-20:INFO:===VALIDATION===:Checking Password Validity on target nodes
2018-03-13_12-16-20:INFO:NODES=<host name> Retry Count 5
2018-03-13_12-16-20:INFO:retry count : 1
2018-03-13_12-16-20:INFO:Running cmd /bin/true on node <host name>
2018-03-13_12-16-20:INFO:ssh connect timeout 60000
2018-03-13_12-16-20:INFO:Error Message: PROV-16011: Algorithm negotiation fail
2018-03-13_12-16-20:INFO:Error Level : -1
2018-03-13_12-16-20:INFO:Cause : null
2018-03-13_12-16-20:INFO:Full Message: Algorithm negotiation fail
2018-03-13_12-16-20:INFO:Message: Algorithm negotiation fail
2018-03-13_12-16-20:INFO:AuthFailMsg to check password Auth fail keys Auth cancel
2018-03-13_12-16-20:INFO: SSH Connect Failure for user oracle on node <host name>
2018-03-13_12-16-20:INFO: Jsch Validation Failed Problem :SSH connection check failed Recommendation: Ensure that SSH daemon (sshd) on the target host is able to respond to login requests.
2018-03-13_12-16-20:INFO:Breaking since the jsch validation  has failed
2018-03-13_12-16-20:INFO:InvocationTargetException Exception
2018-03-13_12-16-20:INFO:Printing Exception :java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at oracle.sysman.core.agentpush.ui.deployer.BaseDeployerOps.executeActions(BaseDeployerOps.java:1924)
at oracle.sysman.core.agentpush.ui.deployer.InitializationDeployer.deploy(InitializationDeployer.java:452)
at oracle.sysman.core.agentpush.ui.deployfwk.DeploymentWorker.run(DeploymentWorker.java:26)
at oracle.sysman.util.threadPoolManager.WorkerThread.run(Worker.java:311)
Caused by: oracle.sysman.core.agentpush.ui.exception.JschValidationException
at oracle.sysman.core.agentpush.ui.deployer.JschValidationOps.doRemotePasswordCheck(JschValidationOps.java:591)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at oracle.sysman.core.agentpush.ui.deployer.InitializationDeployer.doSSHValidations(InitializationDeployer.java:161)
... 8 more

2018-03-13_12-14-48:INFO: Jsch Valdation Failed Problem :SSH connection check failed Recommendation: Ensure that SSH daemon (sshd) on the target host is able to respond to login requests.
2018-03-13_12-14-48:INFO:Updating Action SSHValidationswith Status FAILED and error Message :Connection to the SSH daemon (sshd) on the target host failed with the following error : Algorithm negotiation fail and problem SSH connection check failed and recommendation Ensure that SSH daemon (sshd) on the target host is able to respond to login requests.



 

 

Changes

 

Cause

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