Details
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Bug
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Status: Closed (View Workflow)
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Critical
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Resolution: Not A Defect
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None
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Jenkins 2.277.3
Description
The windows agent doesn't connect to Jenkins server
Step to reproduce
1) download agent.jar from Jenkins server
2) run in windows cmd:
C:\tmp>java -jar agent.jar -jnlpUrl https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp -secret 94e0097f6b1b889bb19386667909d373d762a5c08230963a7df0df5e35aa6540 -noCertificateCheck
This is the log:
Skipping HTTPS certificate checks altogether. Note that this is not secure at all.
May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main createEngine
INFO: Setting up agent: Jenkins Windows Slave
May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener <init>
INFO: Jenkins agent is running in headless mode.
May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main createEngine
WARNING: Certificate validation for HTTPs endpoints is disabled
May 10, 2021 6:11:14 PM hudson.remoting.Engine startEngine
INFO: Using Remoting version: 4.6
May 10, 2021 6:11:14 PM hudson.remoting.Engine startEngine
WARNING: No Working Directory. Using the legacy JAR Cache location: C:\Users\gianc\.jenkins\cache\jars
May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status
INFO: Locating server among https://jenkins.[myurl.com
May 10, 2021 6:11:14 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver openURLConnection
WARNING: HTTPs certificate check is disabled for the endpoint.
May 10, 2021 6:11:14 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver resolve
INFO: Remoting server accepts the following protocols: [JNLP4-connect, Ping]
May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status
INFO: Agent discovery successful
Agent address: jenkins.myurl.com
Agent port: 30500
Identity: e6:20:0c:c5:02:da:ef:3e:ec:a1:d1:76:45:b3:f7:46
May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status
INFO: Handshaking
May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connecting to jenkins.myurl.com:30500
May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status
INFO: Trying protocol: JNLP4-connect
May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status
INFO: Protocol JNLP4-connect failed to establish channel
java.nio.channels.ClosedChannelException
at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.doSend(ProtocolStack.java:694)
at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.doSend(AckFilterLayer.java:312)
at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.start(AckFilterLayer.java:187)
at org.jenkinsci.remoting.protocol.ProtocolStack.init(ProtocolStack.java:202)
at org.jenkinsci.remoting.protocol.ProtocolStack.access$700(ProtocolStack.java:107)
at org.jenkinsci.remoting.protocol.ProtocolStack$Builder.build(ProtocolStack.java:555)
at org.jenkinsci.remoting.engine.JnlpProtocol4Handler.connect(JnlpProtocol4Handler.java:181)
at org.jenkinsci.remoting.engine.JnlpProtocolHandler.connect(JnlpProtocolHandler.java:157)
at hudson.remoting.Engine.innerRun(Engine.java:739)
at hudson.remoting.Engine.run(Engine.java:514)
^^
May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener error
SEVERE: The server rejected the connection: None of the protocols were accepted
java.lang.Exception: The server rejected the connection: None of the protocols were accepted
at hudson.remoting.Engine.onConnectionRejected(Engine.java:824)
at hudson.remoting.Engine.innerRun(Engine.java:764)
at hudson.remoting.Engine.run(Engine.java:514)
I have read the source code
https://github.com/jenkinsci/remoting/blob/master/src/main/java/hudson/remoting/Engine.java
but i don't understand why it raise
failed to establish channel
It would be nice to implement in the source code the explanation of why the communication fails
I have an old good Jenkins 2.249.3
if i try to connect on port 30500:
telnet good-jenkins.myurl.com 30500
Trying 192.168.45.110...
Connected to good-jenkins.myurl.com.
Escape character is '^]'.
instead with the new release of Jenkins 2.277.3, it connects, but then the connection is immediately disconnected
telnet bad-jenkins.myurl.com 30500
Trying 192.168.43.49...
Connected to bad-jenkins.myurl.com.
Escape character is '^]'.
Connection closed by foreign host.
I have attached the global security - agent config.
Attachments
Activity
Giancarlo
created issue -
Giancarlo
made changes -
| Field | Original Value | New Value |
|---|---|---|
| Rank | Ranked higher |
Giancarlo
made changes -
| Attachment | agent.jpg [ 54763 ] | |
| Description |
The windows agent doesn't connect to Jenkins server
Step to reproduce 1) download agent.jar from Jenkins server 2) run in windows cmd: C:\tmp>java -jar agent.jar -jnlpUrl https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp -secret 94e0097f6b1b889bb19386667909d373d762a5c08230963a7df0df5e35aa6540 This is the log ^[Loaded java.lang.Throwable$PrintStreamOrWriter from C:\Program Files\Java\jre1.8.0_51\lib\rt.jar]^ ^[Loaded java.lang.Throwable$WrappedPrintWriter from C:\Program Files\Java\jre1.8.0_51\lib\rt.jar]^ ^[Loaded java.util.IdentityHashMap$KeySet from C:\Program Files\Java\jre1.8.0_51\lib\rt.jar]^ ^May 10, 2021 5:45:27 PM hudson.remoting.jnlp.Main$CuiListener status^ ^INFO: Protocol JNLP4-connect failed to establish channel^ ^java.nio.channels.ClosedChannelException^ ^at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.doSend(ProtocolStack.java:694)^ ^at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.doSend(AckFilterLayer.java:312)^ ^at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.start(AckFilterLayer.java:187)^ ^at org.jenkinsci.remoting.protocol.ProtocolStack.init(ProtocolStack.java:202)^ ^at org.jenkinsci.remoting.protocol.ProtocolStack.access$700(ProtocolStack.java:107)^ ^at org.jenkinsci.remoting.protocol.ProtocolStack$Builder.build(ProtocolStack.java:555)^ ^at org.jenkinsci.remoting.engine.JnlpProtocol4Handler.connect(JnlpProtocol4Handler.java:181)^ ^at org.jenkinsci.remoting.engine.JnlpProtocolHandler.connect(JnlpProtocolHandler.java:157)^ ^at hudson.remoting.Engine.innerRun(Engine.java:739)^ ^at hudson.remoting.Engine.run(Engine.java:514)^ ^May 10, 2021 5:45:27 PM hudson.remoting.jnlp.Main$CuiListener error^ ^SEVERE: The server rejected the connection: None of the protocols were accepted^ ^java.lang.Exception: The server rejected the connection: None of the protocols were accepted^ ^at hudson.remoting.Engine.onConnectionRejected(Engine.java:824)^ ^at hudson.remoting.Engine.innerRun(Engine.java:764)^ ^at hudson.remoting.Engine.run(Engine.java:514)^ ^[Loaded java.util.IdentityHashMap$IdentityHashMapIterator from C:\Program Files\Java\jre1.8.0_51\lib\rt.jar]^ I have read the source code [https://github.com/jenkinsci/remoting/blob/master/src/main/java/hudson/remoting/Engine.java] but i don't understand why it raise *failed to establish channel* |
The windows agent doesn't connect to Jenkins server
Step to reproduce 1) download agent.jar from Jenkins server 2) run in windows cmd: C:\tmp>java -jar agent.jar -jnlpUrl [https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp] -secret 94e0097f6b1b889bb19386667909d373d762a5c08230963a7df0df5e35aa6540 This is the log: Skipping HTTPS certificate checks altogether. Note that this is not secure at all. May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main createEngine INFO: Setting up agent: Jenkins Windows Slave May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener <init> INFO: Jenkins agent is running in headless mode. May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main createEngine WARNING: Certificate validation for HTTPs endpoints is disabled May 10, 2021 6:11:14 PM hudson.remoting.Engine startEngine INFO: Using Remoting version: 4.6 May 10, 2021 6:11:14 PM hudson.remoting.Engine startEngine WARNING: No Working Directory. Using the legacy JAR Cache location: C:\Users\gianc\.jenkins\cache\jars May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Locating server among [https://jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp]/] May 10, 2021 6:11:14 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver openURLConnection WARNING: HTTPs certificate check is disabled for the endpoint. May 10, 2021 6:11:14 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver resolve INFO: Remoting server accepts the following protocols: [JNLP4-connect, Ping] May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Agent discovery successful Agent address: jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp] Agent port: 30500 Identity: e6:20:0c:c5:02:da:ef:3e:ec:a1:d1:76:45:b3:f7:46 May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Handshaking May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Connecting to jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp]:30500 May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Trying protocol: JNLP4-connect May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Protocol JNLP4-connect failed to establish channel java.nio.channels.ClosedChannelException at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.doSend(ProtocolStack.java:694) at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.doSend(AckFilterLayer.java:312) at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.start(AckFilterLayer.java:187) at org.jenkinsci.remoting.protocol.ProtocolStack.init(ProtocolStack.java:202) at org.jenkinsci.remoting.protocol.ProtocolStack.access$700(ProtocolStack.java:107) at org.jenkinsci.remoting.protocol.ProtocolStack$Builder.build(ProtocolStack.java:555) at org.jenkinsci.remoting.engine.JnlpProtocol4Handler.connect(JnlpProtocol4Handler.java:181) at org.jenkinsci.remoting.engine.JnlpProtocolHandler.connect(JnlpProtocolHandler.java:157) at hudson.remoting.Engine.innerRun(Engine.java:739) at hudson.remoting.Engine.run(Engine.java:514) {{^^}} May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener error SEVERE: The server rejected the connection: None of the protocols were accepted java.lang.Exception: The server rejected the connection: None of the protocols were accepted at hudson.remoting.Engine.onConnectionRejected(Engine.java:824) at hudson.remoting.Engine.innerRun(Engine.java:764) at hudson.remoting.Engine.run(Engine.java:514) I have read the source code [https://github.com/jenkinsci/remoting/blob/master/src/main/java/hudson/remoting/Engine.java] but i don't understand why it raise *failed to establish channel* I have attached the global security - agent config. |
Giancarlo
made changes -
| Description |
The windows agent doesn't connect to Jenkins server
Step to reproduce 1) download agent.jar from Jenkins server 2) run in windows cmd: C:\tmp>java -jar agent.jar -jnlpUrl [https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp] -secret 94e0097f6b1b889bb19386667909d373d762a5c08230963a7df0df5e35aa6540 This is the log: Skipping HTTPS certificate checks altogether. Note that this is not secure at all. May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main createEngine INFO: Setting up agent: Jenkins Windows Slave May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener <init> INFO: Jenkins agent is running in headless mode. May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main createEngine WARNING: Certificate validation for HTTPs endpoints is disabled May 10, 2021 6:11:14 PM hudson.remoting.Engine startEngine INFO: Using Remoting version: 4.6 May 10, 2021 6:11:14 PM hudson.remoting.Engine startEngine WARNING: No Working Directory. Using the legacy JAR Cache location: C:\Users\gianc\.jenkins\cache\jars May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Locating server among [https://jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp]/] May 10, 2021 6:11:14 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver openURLConnection WARNING: HTTPs certificate check is disabled for the endpoint. May 10, 2021 6:11:14 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver resolve INFO: Remoting server accepts the following protocols: [JNLP4-connect, Ping] May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Agent discovery successful Agent address: jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp] Agent port: 30500 Identity: e6:20:0c:c5:02:da:ef:3e:ec:a1:d1:76:45:b3:f7:46 May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Handshaking May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Connecting to jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp]:30500 May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Trying protocol: JNLP4-connect May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Protocol JNLP4-connect failed to establish channel java.nio.channels.ClosedChannelException at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.doSend(ProtocolStack.java:694) at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.doSend(AckFilterLayer.java:312) at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.start(AckFilterLayer.java:187) at org.jenkinsci.remoting.protocol.ProtocolStack.init(ProtocolStack.java:202) at org.jenkinsci.remoting.protocol.ProtocolStack.access$700(ProtocolStack.java:107) at org.jenkinsci.remoting.protocol.ProtocolStack$Builder.build(ProtocolStack.java:555) at org.jenkinsci.remoting.engine.JnlpProtocol4Handler.connect(JnlpProtocol4Handler.java:181) at org.jenkinsci.remoting.engine.JnlpProtocolHandler.connect(JnlpProtocolHandler.java:157) at hudson.remoting.Engine.innerRun(Engine.java:739) at hudson.remoting.Engine.run(Engine.java:514) {{^^}} May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener error SEVERE: The server rejected the connection: None of the protocols were accepted java.lang.Exception: The server rejected the connection: None of the protocols were accepted at hudson.remoting.Engine.onConnectionRejected(Engine.java:824) at hudson.remoting.Engine.innerRun(Engine.java:764) at hudson.remoting.Engine.run(Engine.java:514) I have read the source code [https://github.com/jenkinsci/remoting/blob/master/src/main/java/hudson/remoting/Engine.java] but i don't understand why it raise *failed to establish channel* I have attached the global security - agent config. |
The windows agent doesn't connect to Jenkins server
Step to reproduce 1) download agent.jar from Jenkins server 2) run in windows cmd: C:\tmp>java -jar agent.jar -jnlpUrl [https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp] -secret 94e0097f6b1b889bb19386667909d373d762a5c08230963a7df0df5e35aa6540 -noCertificateCheck This is the log: Skipping HTTPS certificate checks altogether. Note that this is not secure at all. May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main createEngine INFO: Setting up agent: Jenkins Windows Slave May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener <init> INFO: Jenkins agent is running in headless mode. May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main createEngine WARNING: Certificate validation for HTTPs endpoints is disabled May 10, 2021 6:11:14 PM hudson.remoting.Engine startEngine INFO: Using Remoting version: 4.6 May 10, 2021 6:11:14 PM hudson.remoting.Engine startEngine WARNING: No Working Directory. Using the legacy JAR Cache location: C:\Users\gianc\.jenkins\cache\jars May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Locating server among [https://jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp]/] May 10, 2021 6:11:14 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver openURLConnection WARNING: HTTPs certificate check is disabled for the endpoint. May 10, 2021 6:11:14 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver resolve INFO: Remoting server accepts the following protocols: [JNLP4-connect, Ping] May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Agent discovery successful Agent address: jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp] Agent port: 30500 Identity: e6:20:0c:c5:02:da:ef:3e:ec:a1:d1:76:45:b3:f7:46 May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Handshaking May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Connecting to jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp]:30500 May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Trying protocol: JNLP4-connect May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Protocol JNLP4-connect failed to establish channel java.nio.channels.ClosedChannelException at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.doSend(ProtocolStack.java:694) at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.doSend(AckFilterLayer.java:312) at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.start(AckFilterLayer.java:187) at org.jenkinsci.remoting.protocol.ProtocolStack.init(ProtocolStack.java:202) at org.jenkinsci.remoting.protocol.ProtocolStack.access$700(ProtocolStack.java:107) at org.jenkinsci.remoting.protocol.ProtocolStack$Builder.build(ProtocolStack.java:555) at org.jenkinsci.remoting.engine.JnlpProtocol4Handler.connect(JnlpProtocol4Handler.java:181) at org.jenkinsci.remoting.engine.JnlpProtocolHandler.connect(JnlpProtocolHandler.java:157) at hudson.remoting.Engine.innerRun(Engine.java:739) at hudson.remoting.Engine.run(Engine.java:514) {{^^}} May 10, 2021 6:11:14 PM 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 were accepted at hudson.remoting.Engine.onConnectionRejected(Engine.java:824) at hudson.remoting.Engine.innerRun(Engine.java:764) at hudson.remoting.Engine.run(Engine.java:514) I have read the source code [https://github.com/jenkinsci/remoting/blob/master/src/main/java/hudson/remoting/Engine.java] but i don't understand why it raise *failed to establish channel* I have attached the global security - agent config. |
Giancarlo
added a comment - I have an old good Jenkins 2.249.3
if i try to connect on port 30500:
telnet good-jenkins.myurl.com 30500
Trying 192.168.45.110...
Connected to good-jenkins.myurl.com.
Escape character is '^]'.
instead with the new release of Jenkins 2.277.3, it connects, but then the connection is immediately disconnected
telnet bad-jenkins.myurl.com 30500
Trying 192.168.43.49...
Connected to bad-jenkins.myurl.com.
Escape character is '^]'.
Connection closed by foreign host.
Giancarlo
added a comment - I have an old good Jenkins 2.249.3
if i try to connect on port 30500:
telnet good-jenkins.myurl.com 30500
Trying 192.168.45.110...
Connected to good-jenkins.myurl.com.
Escape character is '^]'.
instead with the new release of Jenkins 2.277.3, it connects, but then the connection is immediately disconnected
telnet bad-jenkins.myurl.com 30500
Trying 192.168.43.49...
Connected to bad-jenkins.myurl.com.
Escape character is '^]'.
Connection closed by foreign host. Giancarlo
made changes -
| Description |
The windows agent doesn't connect to Jenkins server
Step to reproduce 1) download agent.jar from Jenkins server 2) run in windows cmd: C:\tmp>java -jar agent.jar -jnlpUrl [https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp] -secret 94e0097f6b1b889bb19386667909d373d762a5c08230963a7df0df5e35aa6540 -noCertificateCheck This is the log: Skipping HTTPS certificate checks altogether. Note that this is not secure at all. May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main createEngine INFO: Setting up agent: Jenkins Windows Slave May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener <init> INFO: Jenkins agent is running in headless mode. May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main createEngine WARNING: Certificate validation for HTTPs endpoints is disabled May 10, 2021 6:11:14 PM hudson.remoting.Engine startEngine INFO: Using Remoting version: 4.6 May 10, 2021 6:11:14 PM hudson.remoting.Engine startEngine WARNING: No Working Directory. Using the legacy JAR Cache location: C:\Users\gianc\.jenkins\cache\jars May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Locating server among [https://jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp]/] May 10, 2021 6:11:14 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver openURLConnection WARNING: HTTPs certificate check is disabled for the endpoint. May 10, 2021 6:11:14 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver resolve INFO: Remoting server accepts the following protocols: [JNLP4-connect, Ping] May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Agent discovery successful Agent address: jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp] Agent port: 30500 Identity: e6:20:0c:c5:02:da:ef:3e:ec:a1:d1:76:45:b3:f7:46 May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Handshaking May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Connecting to jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp]:30500 May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Trying protocol: JNLP4-connect May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Protocol JNLP4-connect failed to establish channel java.nio.channels.ClosedChannelException at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.doSend(ProtocolStack.java:694) at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.doSend(AckFilterLayer.java:312) at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.start(AckFilterLayer.java:187) at org.jenkinsci.remoting.protocol.ProtocolStack.init(ProtocolStack.java:202) at org.jenkinsci.remoting.protocol.ProtocolStack.access$700(ProtocolStack.java:107) at org.jenkinsci.remoting.protocol.ProtocolStack$Builder.build(ProtocolStack.java:555) at org.jenkinsci.remoting.engine.JnlpProtocol4Handler.connect(JnlpProtocol4Handler.java:181) at org.jenkinsci.remoting.engine.JnlpProtocolHandler.connect(JnlpProtocolHandler.java:157) at hudson.remoting.Engine.innerRun(Engine.java:739) at hudson.remoting.Engine.run(Engine.java:514) {{^^}} May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener error SEVERE: The server rejected the connection: None of the protocols were accepted java.lang.Exception: The server rejected the connection: None of the protocols were accepted at hudson.remoting.Engine.onConnectionRejected(Engine.java:824) at hudson.remoting.Engine.innerRun(Engine.java:764) at hudson.remoting.Engine.run(Engine.java:514) I have read the source code [https://github.com/jenkinsci/remoting/blob/master/src/main/java/hudson/remoting/Engine.java] but i don't understand why it raise *failed to establish channel* I have attached the global security - agent config. |
The windows agent doesn't connect to Jenkins server
Step to reproduce 1) download agent.jar from Jenkins server 2) run in windows cmd: C:\tmp>java -jar agent.jar -jnlpUrl [https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp] -secret 94e0097f6b1b889bb19386667909d373d762a5c08230963a7df0df5e35aa6540 -noCertificateCheck This is the log: Skipping HTTPS certificate checks altogether. Note that this is not secure at all. May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main createEngine INFO: Setting up agent: Jenkins Windows Slave May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener <init> INFO: Jenkins agent is running in headless mode. May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main createEngine WARNING: Certificate validation for HTTPs endpoints is disabled May 10, 2021 6:11:14 PM hudson.remoting.Engine startEngine INFO: Using Remoting version: 4.6 May 10, 2021 6:11:14 PM hudson.remoting.Engine startEngine WARNING: No Working Directory. Using the legacy JAR Cache location: C:\Users\gianc\.jenkins\cache\jars May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Locating server among [https://jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp]/] May 10, 2021 6:11:14 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver openURLConnection WARNING: HTTPs certificate check is disabled for the endpoint. May 10, 2021 6:11:14 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver resolve INFO: Remoting server accepts the following protocols: [JNLP4-connect, Ping] May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Agent discovery successful Agent address: jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp] Agent port: 30500 Identity: e6:20:0c:c5:02:da:ef:3e:ec:a1:d1:76:45:b3:f7:46 May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Handshaking May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Connecting to jenkins.[myurl.com|https://jenkins.myurl.com/computer/Jenkins%20Windows%20Slave/jenkins-agent.jnlp]:30500 May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Trying protocol: JNLP4-connect May 10, 2021 6:11:14 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Protocol JNLP4-connect failed to establish channel java.nio.channels.ClosedChannelException at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.doSend(ProtocolStack.java:694) at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.doSend(AckFilterLayer.java:312) at org.jenkinsci.remoting.protocol.impl.AckFilterLayer.start(AckFilterLayer.java:187) at org.jenkinsci.remoting.protocol.ProtocolStack.init(ProtocolStack.java:202) at org.jenkinsci.remoting.protocol.ProtocolStack.access$700(ProtocolStack.java:107) at org.jenkinsci.remoting.protocol.ProtocolStack$Builder.build(ProtocolStack.java:555) at org.jenkinsci.remoting.engine.JnlpProtocol4Handler.connect(JnlpProtocol4Handler.java:181) at org.jenkinsci.remoting.engine.JnlpProtocolHandler.connect(JnlpProtocolHandler.java:157) at hudson.remoting.Engine.innerRun(Engine.java:739) at hudson.remoting.Engine.run(Engine.java:514) {{^^}} May 10, 2021 6:11:14 PM 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 were accepted at hudson.remoting.Engine.onConnectionRejected(Engine.java:824) at hudson.remoting.Engine.innerRun(Engine.java:764) at hudson.remoting.Engine.run(Engine.java:514) I have read the source code [https://github.com/jenkinsci/remoting/blob/master/src/main/java/hudson/remoting/Engine.java] but i don't understand why it raise *failed to establish channel* It would be nice to implement in the source code the explanation of why the communication fails I have an old good Jenkins 2.249.3 if i try to connect on port 30500: telnet good-jenkins.myurl.com 30500 Trying 192.168.45.110... Connected to good-jenkins.myurl.com. Escape character is '^]'. instead with the new release of Jenkins 2.277.3, it connects, but then the connection is immediately disconnected telnet bad-jenkins.myurl.com 30500 Trying 192.168.43.49... Connected to bad-jenkins.myurl.com. Escape character is '^]'. Connection closed by foreign host. I have attached the global security - agent config. |
Giancarlo
added a comment - I found the cause:
it is a problem related to the new helm template
Now we need to add a new parameter, to configure it correctly:
controller:
agentListenerPort: 30500
agentListenerNodePort: 30500
Giancarlo
added a comment - I found the cause:
it is a problem related to the new helm template
Now we need to add a new parameter, to configure it correctly:
controller:
agentListenerPort: 30500
agentListenerNodePort: 30500 Giancarlo
added a comment - I found the cause:
it is a bad configuration in the new helm template
Now we need to add a new parameter, to configure it correctly:
controller:
agentListenerPort: 30500
agentListenerNodePort: 30500
Giancarlo
added a comment - I found the cause:
it is a bad configuration in the new helm template
Now we need to add a new parameter, to configure it correctly:
controller:
agentListenerPort: 30500
agentListenerNodePort: 30500 Giancarlo
made changes -
| Resolution | Not A Defect [ 7 ] | |
| Status | Open [ 1 ] | Fixed but Unreleased [ 10203 ] |
Basil Crow
made changes -
| Status | Fixed but Unreleased [ 10203 ] | Closed [ 6 ] |
You can try hitting the agent connection port at https://jenkins.myurl.com:30500 (based on your image), and see what it says for Jenkins-Agent-Protocols. Otherwise I don't have any good suggestions.