Hi,

I'm unable to start/connect slave machine, using JNLP, after installing version 2.27 on master + new 3.0 slave.jar on slave computer. Installed Java 1.8.111.

I've enabled Java Web Start agent 3 and 4 in Configure Global Security, but to no avail. All I'm getting is an error "Local headers refused by remote: CPRAN03 is not a JNLP agent" followed by number of exceptions and even version 3 and 2 of JNLP agent fails to start. Is there something else I need to configure in latest Jenkins 2.27?

C:\Jenkins>call "C:\Program Files (x86)\Java\jre1.8.0_111\bin\java.exe" -Xrs -ja
r "slave.jar" -jnlpUrl http://cpjen01:8090/computer/CPRAN03/slave-agent.jnlp -se
cret "secretkey"
Oct 25, 2016 7:58:00 AM hudson.remoting.jnlp.Main createEngine
INFO: Setting up slave: CPRAN03
Oct 25, 2016 7:58:00 AM hudson.remoting.jnlp.Main$CuiListener <init>
INFO: Jenkins agent is running in headless mode.
Oct 25, 2016 7:58:00 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Locating server among http://cpjen01:8090/
Oct 25, 2016 7:58:00 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Agent discovery successful
Agent address: cpjen01
Agent port: 49274
Identity: ab:f2:5f:d6:32:a6:42:71:fc:d8:9f:9a:05:0c:77:d0
Oct 25, 2016 7:58:00 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Handshaking
Oct 25, 2016 7:58:00 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connecting to cpjen01:49274
Oct 25, 2016 7:58:00 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Trying protocol: JNLP4-connect
Oct 25, 2016 7:58:00 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Remote identity confirmed: ab:f2:5f:d6:32:a6:42:71:fc:d8:9f:9a:05:0c:77:d0

Oct 25, 2016 7:58:00 AM org.jenkinsci.remoting.protocol.impl.ConnectionHeadersFi
lterLayer onRecv
INFO: [JNLP4-connect connection to cpjen01/10.8.32.77:49274] Local headers refus
ed by remote: CPRAN03 is not a JNLP agent
Oct 25, 2016 7:58:00 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Protocol JNLP4-connect encountered an unexpected exception
java.util.concurrent.ExecutionException: org.jenkinsci.remoting.protocol.impl.Co
nnectionRefusalException: CPRAN03 is not a JNLP agent
at org.jenkinsci.remoting.util.SettableFuture.get(SettableFuture.java:22
3)
at hudson.remoting.Engine.innerRun(Engine.java:415)
at hudson.remoting.Engine.run(Engine.java:280)
Caused by: org.jenkinsci.remoting.protocol.impl.ConnectionRefusalException: CPRA
N03 is not a JNLP agent
at org.jenkinsci.remoting.protocol.impl.ConnectionHeadersFilterLayer.new
AbortCause(ConnectionHeadersFilterLayer.java:377)
at org.jenkinsci.remoting.protocol.impl.ConnectionHeadersFilterLayer.onR
ecvClosed(ConnectionHeadersFilterLayer.java:432)
at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.onRecvClosed(Protoc
olStack.java:832)
at org.jenkinsci.remoting.protocol.FilterLayer.onRecvClosed(FilterLayer.
java:287)
at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.onRecvClose
d(SSLEngineFilterLayer.java:172)
at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.onRecvClosed(Protoc
olStack.java:832)
at org.jenkinsci.remoting.protocol.NetworkLayer.onRecvClosed(NetworkLaye
r.java:154)
at org.jenkinsci.remoting.protocol.impl.BIONetworkLayer.access$1500(BION
etworkLayer.java:48)
at org.jenkinsci.remoting.protocol.impl.BIONetworkLayer$Reader.run(BIONe
tworkLayer.java:247)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at hudson.remoting.Engine$1$1.run(Engine.java:94)
at java.lang.Thread.run(Unknown Source)
Suppressed: java.nio.channels.ClosedChannelException
... 7 more

Oct 25, 2016 7:58:00 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connecting to cpjen01:49274
Oct 25, 2016 7:58:00 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Server reports protocol JNLP4-plaintext not supported, skipping
Oct 25, 2016 7:58:00 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Trying protocol: JNLP3-connect
Oct 25, 2016 7:58:01 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Protocol JNLP3-connect encountered an unexpected exception
java.util.concurrent.ExecutionException: org.jenkinsci.remoting.protocol.impl.Co
nnectionRefusalException: JNLP3-connect: Master rejected connection:
at java.util.concurrent.FutureTask.report(Unknown Source)
at java.util.concurrent.FutureTask.get(Unknown Source)
at hudson.remoting.Engine.innerRun(Engine.java:415)
at hudson.remoting.Engine.run(Engine.java:280)
Caused by: org.jenkinsci.remoting.protocol.impl.ConnectionRefusalException: JNLP
3-connect: Master rejected connection:
at org.jenkinsci.remoting.engine.JnlpProtocol3Handler.sendHandshake(Jnlp
Protocol3Handler.java:239)
at org.jenkinsci.remoting.engine.JnlpProtocol3Handler.sendHandshake(Jnlp
Protocol3Handler.java:123)
at org.jenkinsci.remoting.engine.LegacyJnlpProtocolHandler$2.call(Legacy
JnlpProtocolHandler.java:162)
at org.jenkinsci.remoting.engine.LegacyJnlpProtocolHandler$2.call(Legacy
JnlpProtocolHandler.java:158)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at hudson.remoting.Engine$1$1.run(Engine.java:94)
at java.lang.Thread.run(Unknown Source)

Oct 25, 2016 7:58:01 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connecting to cpjen01:49274
Oct 25, 2016 7:58:01 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Trying protocol: JNLP2-connect
Oct 25, 2016 7:58:01 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Protocol JNLP2-connect encountered an unexpected exception
java.util.concurrent.ExecutionException: org.jenkinsci.remoting.protocol.impl.Co
nnectionRefusalException: Server didn't accept the handshake:
at java.util.concurrent.FutureTask.report(Unknown Source)
at java.util.concurrent.FutureTask.get(Unknown Source)
at hudson.remoting.Engine.innerRun(Engine.java:415)
at hudson.remoting.Engine.run(Engine.java:280)
Caused by: org.jenkinsci.remoting.protocol.impl.ConnectionRefusalException: Serv
er didn't accept the handshake:
at org.jenkinsci.remoting.engine.JnlpProtocol2Handler.sendHandshake(Jnlp
Protocol2Handler.java:134)
at org.jenkinsci.remoting.engine.LegacyJnlpProtocolHandler$2.call(Legacy
JnlpProtocolHandler.java:162)
at org.jenkinsci.remoting.engine.LegacyJnlpProtocolHandler$2.call(Legacy
JnlpProtocolHandler.java:158)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at hudson.remoting.Engine$1$1.run(Engine.java:94)
at java.lang.Thread.run(Unknown Source)

Oct 25, 2016 7:58:01 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connecting to cpjen01:49274
Oct 25, 2016 7:58:01 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Trying protocol: JNLP-connect
Oct 25, 2016 7:58:01 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Protocol JNLP-connect encountered an unexpected exception
java.util.concurrent.ExecutionException: org.jenkinsci.remoting.protocol.impl.Co
nnectionRefusalException: Server didn't accept the handshake:
at java.util.concurrent.FutureTask.report(Unknown Source)
at java.util.concurrent.FutureTask.get(Unknown Source)
at hudson.remoting.Engine.innerRun(Engine.java:415)
at hudson.remoting.Engine.run(Engine.java:280)
Caused by: org.jenkinsci.remoting.protocol.impl.ConnectionRefusalException: Serv
er didn't accept the handshake:
at org.jenkinsci.remoting.engine.JnlpProtocol1Handler.sendHandshake(Jnlp
Protocol1Handler.java:121)
at org.jenkinsci.remoting.engine.LegacyJnlpProtocolHandler$2.call(Legacy
JnlpProtocolHandler.java:162)
at org.jenkinsci.remoting.engine.LegacyJnlpProtocolHandler$2.call(Legacy
JnlpProtocolHandler.java:158)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at hudson.remoting.Engine$1$1.run(Engine.java:94)
at java.lang.Thread.run(Unknown Source)

Oct 25, 2016 7:58:01 AM hudson.remoting.jnlp.Main$CuiListener error
SEVERE: The server rejected the connection: None of the protocols were accepted
java.lang.Exception: The server rejected the connection: None of the protocols w
ere accepted
at hudson.remoting.Engine.onConnectionRejected(Engine.java:476)
at hudson.remoting.Engine.innerRun(Engine.java:440)
at hudson.remoting.Engine.run(Engine.java:280)

Also, when I try to run the slave-agent.jnlp (via http://cpjen01:8090/computer/CPRAN03/slave-agent.jnlp) it fails with error as shown on attached image: