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From "Damjan Jovanovic (JIRA)" <j...@apache.org>
Subject [jira] [Created] (KARAF-4502) REGRESSION: using OpenJDK on CentOS 7 causes bin/client to fail with "Unable to negotiate key exchange for kex algorithms"
Date Wed, 20 Apr 2016 14:23:25 GMT
Damjan Jovanovic created KARAF-4502:
---------------------------------------

             Summary: REGRESSION: using OpenJDK on CentOS 7 causes bin/client to fail with
"Unable to negotiate key exchange for kex algorithms"
                 Key: KARAF-4502
                 URL: https://issues.apache.org/jira/browse/KARAF-4502
             Project: Karaf
          Issue Type: Bug
    Affects Versions: 4.0.4, 4.0.3
         Environment: CentOS Linux release 7.0.1406 (Core) 
openjdk version "1.8.0_77"
            Reporter: Damjan Jovanovic


On a fresh install of CentOS 7 with OpenJDK 1.8, running karaf container versions > 4.0.2
either with "bin/karaf" or as a service (whether sysvinit or systemd), trying to log in with
"bin/client" always fails with an exception.

Oracle JDK - by comparison - works.

"git bisect" narrowed down the regression to the following commit:

539540cde099aee52fd523a09aca92e36522261c is the first bad commit
commit 539540cde099aee52fd523a09aca92e36522261c
Author: Freeman Fang <freeman.fang@gmail.com>
Date:   Wed Oct 14 12:09:09 2015 +0800

    [KARAF-4062]Karaf client does now work after installing BouncyCastle

:040000 040000 926f15997510a671ff77db9623f8b65ce4186706 da83c22e043de3004a620f1cc88e25ee672bd09d
M	client


The exception is:

# bin/client
Logging in as karaf
3771 [sshd-SshClient[593634ad]-nio2-thread-2] WARN org.apache.sshd.client.session.ClientSessionImpl
- Exception caught
java.lang.IllegalStateException: Unable to negotiate key exchange for kex algorithms (client:
ecdh-sha2-nistp256,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp384,ecdh-sha2-nistp521,ecdh-sha2-nistp521
/ server: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1)
	at org.apache.sshd.common.session.AbstractSession.negotiate(AbstractSession.java:1159)
	at org.apache.sshd.common.session.AbstractSession.doHandleMessage(AbstractSession.java:388)
	at org.apache.sshd.common.session.AbstractSession.handleMessage(AbstractSession.java:326)
	at org.apache.sshd.client.session.ClientSessionImpl.handleMessage(ClientSessionImpl.java:306)
	at org.apache.sshd.common.session.AbstractSession.decode(AbstractSession.java:780)
	at org.apache.sshd.common.session.AbstractSession.messageReceived(AbstractSession.java:308)
	at org.apache.sshd.common.AbstractSessionIoHandler.messageReceived(AbstractSessionIoHandler.java:54)
	at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:184)
	at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:170)
	at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$1.run(Nio2CompletionHandler.java:32)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:30)
	at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
	at sun.nio.ch.Invoker$2.run(Invoker.java:218)
	at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Authentication failed




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