Hi,
I have a problem with my go agent which runs on AWS EC2 Linux 
ip-172-31-18-206 4.4.0-1016-aws #25-Ubuntu SMP Thu Apr 20 11:34:35 UTC 2017 
x86_64 x86_64 x86_64 GNU/Linux
After I install the agent and set up /etc/default/go-agent GO_SERVER to my 
go server and start the agent I stil can get it connected to the server. 
Server is Go Version: 17.4.0 
(4892-ab17b819e73477a47401744fa64f64fda55c26e8).

I have tried to reinstall the agent several times, and clean up all the jar 
files it downloads from the server but no luck. I also tried direct install 
from dpkg and same issue. Any idea what to do?
Thanks a lot.
Jan



I have these errors in go agent log:


Could not find file `config/agent-log4j.properties'. Attempting to load 
from classpath.
Using classpath resource `config/agent-log4j.properties'.
Exception in thread "main" java.lang.reflect.InvocationTargetException
        at 
sun.reflect.NativeMethodAccessorImpl.invoke0(java.base@9-internal/Native 
Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(java.base@9-internal/NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-internal/DelegatingMethodAccessorImpl.java:43)
        at 
java.lang.reflect.Method.invoke(java.base@9-internal/Method.java:531)
        at com.simontuffs.onejar.Boot.run(Boot.java:306)
        at com.simontuffs.onejar.Boot.main(Boot.java:159)
Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: 
Failed to load bean class: 
com.thoughtworks.go.plugin.infra.listeners.DefaultPluginJarChangeListener; 
nested exception is java.io.FileNotFoundException: class pa$
        at 
org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:293)
        at 
org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:227)
        at 
org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:623)
        at 
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:454)
        at 
org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
        at 
org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
        at com.thoughtworks.go.agent.AgentMain.main(AgentMain.java:42)
        ... 6 more
Caused by: java.io.FileNotFoundException: class path resource 
[java/lang/Object.class] cannot be opened because it does not exist
        at 
org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:157)
        at 
org.springframework.core.type.classreading.SimpleMetadataReader.<init>(SimpleMetadataReader.java:49)
        at 
org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:80)
        at 
org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:101)
        at 
org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:76)
        at 
org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:256)
        at 
org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:148)
        at 
org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:125)
        at 
org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:289)
        ... 12 more




2017-05-12 18:02:15,485 [main     ] INFO 
 beans.factory.support.DefaultListableBeanFactory:434 - Destroying 
singletons in 
org.springframework.beans.factory.support.DefaultListableBeanFactory@36fc695d: 
defining beans [org.springframework$
2017-05-12 18:02:36,339 [main     ] INFO 
 springframework.context.support.ClassPathXmlApplicationContext:503 - 
Refreshing 
org.springframework.context.support.ClassPathXmlApplicationContext@c540f5a: 
startup date [Fri May 12 18:02:36 CEST$
2017-05-12 18:02:36,389 [main     ] INFO 
 beans.factory.xml.XmlBeanDefinitionReader:315 - Loading XML bean 
definitions from class path resource [applicationContext.xml]
2017-05-12 18:02:36,647 [main     ] INFO 
 beans.factory.xml.XmlBeanDefinitionReader:315 - Loading XML bean 
definitions from class path resource [applicationContext-plugin-infra.xml]
2017-05-12 18:02:36,915 [main     ] INFO 
 beans.factory.support.DefaultListableBeanFactory:434 - Destroying 
singletons in 
org.springframework.beans.factory.support.DefaultListableBeanFactory@36fc695d: 
defining beans [org.springframework$
2017-05-12 18:02:57,679 [main     ] INFO 
 springframework.context.support.ClassPathXmlApplicationContext:503 - 
Refreshing 
org.springframework.context.support.ClassPathXmlApplicationContext@c540f5a: 
startup date [Fri May 12 18:02:57 CEST$
2017-05-12 18:02:57,735 [main     ] INFO 
 beans.factory.xml.XmlBeanDefinitionReader:315 - Loading XML bean 
definitions from class path resource [applicationContext.xml]
2017-05-12 18:02:57,989 [main     ] INFO 
 beans.factory.xml.XmlBeanDefinitionReader:315 - Loading XML bean 
definitions from class path resource [applicationContext-plugin-infra.xml]
2017-05-12 18:02:58,272 [main     ] INFO 
 beans.factory.support.DefaultListableBeanFactory:434 - Destroying 
singletons in 
org.springframework.beans.factory.support.DefaultListableBeanFactory@36fc695d: 
defining beans [org.springframework$
2017-05-12 18:03:19,194 [main     ] INFO 
 springframework.context.support.ClassPathXmlApplicationContext:503 - 
Refreshing 
org.springframework.context.support.ClassPathXmlApplicationContext@c540f5a: 
startup date [Fri May 12 18:03:19 CEST$
2017-05-12 18:03:19,252 [main     ] INFO 
 beans.factory.xml.XmlBeanDefinitionReader:315 - Loading XML bean 
definitions from class path resource [applicationContext.xml]
2017-05-12 18:03:19,507 [main     ] INFO 
 beans.factory.xml.XmlBeanDefinitionReader:315 - Loading XML bean 
definitions from class path resource [applicationContext-plugin-infra.xml]
2017-05-12 18:03:19,807 [main     ] INFO 
 beans.factory.support.DefaultListableBeanFactory:434 - Destroying 
singletons in 
org.springframework.beans.factory.support.DefaultListableBeanFactory@36fc695d: 
defining beans [org.springframework$



2017-05-12 18:02:31,767 [TouchLoopThread-146] INFO 
 go.agent.launcher.Lockfile:102 - Using lock file: 
/var/lib/go-agent/.agent-bootstrapper.running
2017-05-12 18:02:32,357 [main     ] INFO  agent.common.util.JarUtil:68 - 
Attempting to load Go-Agent-Bootstrap-Class from agent.jar File:
2017-05-12 18:02:32,358 [main     ] INFO  agent.common.util.JarUtil:83 - 
manifestClassKey: Go-Agent-Bootstrap-Class: 
com.thoughtworks.go.agent.AgentProcessParentImpl
2017-05-12 18:02:32,361 [main     ] INFO 
 thoughtworks.go.agent.AgentProcessParentImpl:52 - Agent is version: 
17.4.0-4892
2017-05-12 18:02:32,839 [main     ] INFO 
 go.agent.launcher.ServerBinaryDownloader:108 - Downloading 
agent-plugins.zip
2017-05-12 18:02:33,081 [main     ] INFO 
 go.agent.launcher.ServerBinaryDownloader:115 - Got server response
2017-05-12 18:02:33,725 [main     ] INFO 
 go.agent.launcher.ServerBinaryDownloader:123 - Piped the stream to 
admin/agent-plugins.zip
2017-05-12 18:02:33,726 [main     ] INFO  thoughtworks.go.util.PerfTimer:53 
- Performance: Downloading new admin/agent-plugins.zip with md5 signature: 
d16d37e455a3e9dd50e3fb27f5a4ab1c took 887ms
2017-05-12 18:02:34,014 [main     ] INFO 
 thoughtworks.go.agent.AgentProcessParentImpl:70 - Launching Agent with 
command: /usr/lib/jvm/java-9-openjdk-amd64/bin/java 
-Dcruise.console.publish.interval=10 -Xms128m -Xmx256m -Djava.security.$
2017-05-12 18:02:53,167 [TouchLoopThread-152] INFO 
 go.agent.launcher.Lockfile:102 - Using lock file: 
/var/lib/go-agent/.agent-bootstrapper.running
2017-05-12 18:02:53,709 [main     ] INFO  agent.common.util.JarUtil:68 - 
Attempting to load Go-Agent-Bootstrap-Class from agent.jar File:
2017-05-12 18:02:53,714 [main     ] INFO  agent.common.util.JarUtil:83 - 
manifestClassKey: Go-Agent-Bootstrap-Class: 
com.thoughtworks.go.agent.AgentProcessParentImpl
2017-05-12 18:02:53,715 [main     ] INFO 
 thoughtworks.go.agent.AgentProcessParentImpl:52 - Agent is version: 
17.4.0-4892
2017-05-12 18:02:54,182 [main     ] INFO 
 go.agent.launcher.ServerBinaryDownloader:108 - Downloading 
agent-plugins.zip
2017-05-12 18:02:54,441 [main     ] INFO 
 go.agent.launcher.ServerBinaryDownloader:115 - Got server response
2017-05-12 18:02:55,063 [main     ] INFO 
 go.agent.launcher.ServerBinaryDownloader:123 - Piped the stream to 
admin/agent-plugins.zip
2017-05-12 18:02:55,063 [main     ] INFO  thoughtworks.go.util.PerfTimer:53 
- Performance: Downloading new admin/agent-plugins.zip with md5 signature: 
d16d37e455a3e9dd50e3fb27f5a4ab1c took 881ms
2017-05-12 18:02:55,350 [main     ] INFO 
 thoughtworks.go.agent.AgentProcessParentImpl:70 - Launching Agent with 
command: /usr/lib/jvm/java-9-openjdk-amd64/bin/java 
-Dcruise.console.publish.interval=10 -Xms128m -Xmx256m -Djava.security.$
2017-05-12 18:03:14,562 [TouchLoopThread-158] INFO 
 go.agent.launcher.Lockfile:102 - Using lock file: 
/var/lib/go-agent/.agent-bootstrapper.running
2017-05-12 18:03:15,217 [main     ] INFO  agent.common.util.JarUtil:68 - 
Attempting to load Go-Agent-Bootstrap-Class from agent.jar File:
2017-05-12 18:03:15,218 [main     ] INFO  agent.common.util.JarUtil:83 - 
manifestClassKey: Go-Agent-Bootstrap-Class: 
com.thoughtworks.go.agent.AgentProcessParentImpl
2017-05-12 18:03:15,219 [main     ] INFO 
 thoughtworks.go.agent.AgentProcessParentImpl:52 - Agent is version: 
17.4.0-4892
2017-05-12 18:03:15,673 [main     ] INFO 
 go.agent.launcher.ServerBinaryDownloader:108 - Downloading 
agent-plugins.zip
2017-05-12 18:03:15,915 [main     ] INFO 
 go.agent.launcher.ServerBinaryDownloader:115 - Got server response
2017-05-12 18:03:16,565 [main     ] INFO 
 go.agent.launcher.ServerBinaryDownloader:123 - Piped the stream to 
admin/agent-plugins.zip
2017-05-12 18:03:16,566 [main     ] INFO  thoughtworks.go.util.PerfTimer:53 
- Performance: Downloading new admin/agent-plugins.zip with md5 signature: 
d16d37e455a3e9dd50e3fb27f5a4ab1c took 893ms
2017-05-12 18:03:16,846 [main     ] INFO 
 thoughtworks.go.agent.AgentProcessParentImpl:70 - Launching Agent with 
command: /usr/lib/jvm/java-9-openjdk-amd64/bin/java 
-Dcruise.console.publish.interval=10 -Xms128m -Xmx256m -Djava.security.$
2017-05-12 18:03:36,067 [TouchLoopThread-164] INFO 
 go.agent.launcher.Lockfile:102 - Using lock file: 
/var/lib/go-agent/.agent-bootstrapper.running
2017-05-12 18:03:36,602 [main     ] INFO  agent.common.util.JarUtil:68 - 
Attempting to load Go-Agent-Bootstrap-Class from agent.jar File:
2017-05-12 18:03:36,603 [main     ] INFO  agent.common.util.JarUtil:83 - 
manifestClassKey: Go-Agent-Bootstrap-Class: 
com.thoughtworks.go.agent.AgentProcessParentImpl
2017-05-12 18:03:36,604 [main     ] INFO 
 thoughtworks.go.agent.AgentProcessParentImpl:52 - Agent is version: 
17.4.0-4892
2017-05-12 18:03:37,082 [main     ] INFO 
 go.agent.launcher.ServerBinaryDownloader:108 - Downloading 
agent-plugins.zip
2017-05-12 18:03:37,323 [main     ] INFO 
 go.agent.launcher.ServerBinaryDownloader:115 - Got server response
2017-05-12 18:03:37,986 [main     ] INFO 
 go.agent.launcher.ServerBinaryDownloader:123 - Piped the stream to 
admin/agent-plugins.zip
2017-05-12 18:03:37,987 [main     ] INFO  thoughtworks.go.util.PerfTimer:53 
- Performance: Downloading new admin/agent-plugins.zip with md5 signature: 
d16d37e455a3e9dd50e3fb27f5a4ab1c took 905ms
2017-05-12 18:03:38,275 [main     ] INFO 
 thoughtworks.go.agent.AgentProcessParentImpl:70 - Launching Agent with 
command: /usr/lib/jvm/java-9-openjdk-amd64/bin/java 
-Dcruise.console.publish.interval=10 -Xms128m -Xmx256m -Djava.security.$


2017-05-12 18:02:53,138 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:79 - Attempting create and start 
launcher...
2017-05-12 18:02:53,158 [main     ] INFO 
 agent.common.util.ParentClassAccessFilteringClassloader:43 - Loading 
com.thoughtworks.cruise.agent.common.launcher.AgentLaunchDescriptor using 
com.simontuffs.onejar.JarClassLoader
2017-05-12 18:03:03,302 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:83 - Launcher returned with code 
1(0x1)
2017-05-12 18:03:03,397 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:128 - Destroying launcher creator
2017-05-12 18:03:04,476 [main     ] INFO 
 go.agent.bootstrapper.DefaultAgentLauncherCreatorImpl:89 - Attempt No: 1 
to cleanup launcher temp files
2017-05-12 18:03:04,476 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:111 - Waiting for 10000 ms before 
re-launch....
2017-05-12 18:03:14,479 [main     ] INFO  agent.common.util.JarUtil:68 - 
Attempting to load Go-Agent-Launcher-Class from 
09feddbb-64bf-4bfe-adba-1d75e493a2ffagent-launcher.jar File:
2017-05-12 18:03:14,480 [main     ] INFO  agent.common.util.JarUtil:77 - 
manifestLibDirKey: Go-Agent-Launcher-Lib-Dir: libs
2017-05-12 18:03:14,508 [main     ] INFO  agent.common.util.JarUtil:83 - 
manifestClassKey: Go-Agent-Launcher-Class: 
com.thoughtworks.go.agent.launcher.AgentLauncherImpl
2017-05-12 18:03:14,509 [main     ] INFO 
 agent.common.util.ParentClassAccessFilteringClassloader:43 - Loading 
com.thoughtworks.cruise.agent.common.launcher.AgentLauncher using 
com.simontuffs.onejar.JarClassLoader
2017-05-12 18:03:14,524 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:79 - Attempting create and start 
launcher...
2017-05-12 18:03:14,558 [main     ] INFO 
 agent.common.util.ParentClassAccessFilteringClassloader:43 - Loading 
com.thoughtworks.cruise.agent.common.launcher.AgentLaunchDescriptor using 
com.simontuffs.onejar.JarClassLoader
2017-05-12 18:03:24,830 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:83 - Launcher returned with code 
1(0x1)
2017-05-12 18:03:24,912 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:128 - Destroying launcher creator
2017-05-12 18:03:25,992 [main     ] INFO 
 go.agent.bootstrapper.DefaultAgentLauncherCreatorImpl:89 - Attempt No: 1 
to cleanup launcher temp files
2017-05-12 18:03:25,993 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:111 - Waiting for 10000 ms before 
re-launch....
2017-05-12 18:03:35,995 [main     ] INFO  agent.common.util.JarUtil:68 - 
Attempting to load Go-Agent-Launcher-Class from 
5e0d1e43-b9bb-44a4-b970-f1a22208a486agent-launcher.jar File:
2017-05-12 18:03:35,995 [main     ] INFO  agent.common.util.JarUtil:77 - 
manifestLibDirKey: Go-Agent-Launcher-Lib-Dir: libs
2017-05-12 18:03:36,018 [main     ] INFO  agent.common.util.JarUtil:83 - 
manifestClassKey: Go-Agent-Launcher-Class: 
com.thoughtworks.go.agent.launcher.AgentLauncherImpl
2017-05-12 18:03:36,023 [main     ] INFO 
 agent.common.util.ParentClassAccessFilteringClassloader:43 - Loading 
com.thoughtworks.cruise.agent.common.launcher.AgentLauncher using 
com.simontuffs.onejar.JarClassLoader
2017-05-12 18:03:36,038 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:79 - Attempting create and start 
launcher...
2017-05-12 18:03:36,060 [main     ] INFO 
 agent.common.util.ParentClassAccessFilteringClassloader:43 - Loading 
com.thoughtworks.cruise.agent.common.launcher.AgentLaunchDescriptor using 
com.simontuffs.onejar.JarClassLoader
2017-05-12 18:03:46,164 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:83 - Launcher returned with code 
1(0x1)
2017-05-12 18:03:46,267 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:128 - Destroying launcher creator
2017-05-12 18:03:47,351 [main     ] INFO 
 go.agent.bootstrapper.DefaultAgentLauncherCreatorImpl:89 - Attempt No: 1 
to cleanup launcher temp files
2017-05-12 18:03:47,351 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:111 - Waiting for 10000 ms before 
re-launch....
2017-05-12 18:03:57,354 [main     ] INFO  agent.common.util.JarUtil:68 - 
Attempting to load Go-Agent-Launcher-Class from 
494dd36c-d42d-4b4f-96c0-dbca881b5f09agent-launcher.jar File:
2017-05-12 18:03:57,354 [main     ] INFO  agent.common.util.JarUtil:77 - 
manifestLibDirKey: Go-Agent-Launcher-Lib-Dir: libs
2017-05-12 18:03:57,377 [main     ] INFO  agent.common.util.JarUtil:83 - 
manifestClassKey: Go-Agent-Launcher-Class: 
com.thoughtworks.go.agent.launcher.AgentLauncherImpl
2017-05-12 18:03:57,379 [main     ] INFO 
 agent.common.util.ParentClassAccessFilteringClassloader:43 - Loading 
com.thoughtworks.cruise.agent.common.launcher.AgentLauncher using 
com.simontuffs.onejar.JarClassLoader
2017-05-12 18:03:57,393 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:79 - Attempting create and start 
launcher...
2017-05-12 18:03:57,431 [main     ] INFO 
 agent.common.util.ParentClassAccessFilteringClassloader:43 - Loading 
com.thoughtworks.cruise.agent.common.launcher.AgentLaunchDescriptor using 
com.simontuffs.onejar.JarClassLoader
2017-05-12 18:04:07,345 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:83 - Launcher returned with code 
1(0x1)
2017-05-12 18:04:07,438 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:128 - Destroying launcher creator
2017-05-12 18:04:08,526 [main     ] INFO 
 go.agent.bootstrapper.DefaultAgentLauncherCreatorImpl:89 - Attempt No: 1 
to cleanup launcher temp files
2017-05-12 18:04:08,526 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:111 - Waiting for 10000 ms before 
re-launch....
2017-05-12 18:04:18,528 [main     ] INFO  agent.common.util.JarUtil:68 - 
Attempting to load Go-Agent-Launcher-Class from 
0c06b361-4fc7-4856-ae74-e2f90cda9dd5agent-launcher.jar File:
2017-05-12 18:04:18,529 [main     ] INFO  agent.common.util.JarUtil:77 - 
manifestLibDirKey: Go-Agent-Launcher-Lib-Dir: libs
2017-05-12 18:04:18,552 [main     ] INFO  agent.common.util.JarUtil:83 - 
manifestClassKey: Go-Agent-Launcher-Class: 
com.thoughtworks.go.agent.launcher.AgentLauncherImpl
2017-05-12 18:04:18,553 [main     ] INFO 
 agent.common.util.ParentClassAccessFilteringClassloader:43 - Loading 
com.thoughtworks.cruise.agent.common.launcher.AgentLauncher using 
com.simontuffs.onejar.JarClassLoader
2017-05-12 18:04:18,568 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:79 - Attempting create and start 
launcher...
2017-05-12 18:04:18,593 [main     ] INFO 
 agent.common.util.ParentClassAccessFilteringClassloader:43 - Loading 
com.thoughtworks.cruise.agent.common.launcher.AgentLaunchDescriptor using 
com.simontuffs.onejar.JarClassLoader
2017-05-12 18:04:28,423 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:83 - Launcher returned with code 
1(0x1)
2017-05-12 18:04:28,563 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:128 - Destroying launcher creator
2017-05-12 18:04:29,653 [main     ] INFO 
 go.agent.bootstrapper.DefaultAgentLauncherCreatorImpl:89 - Attempt No: 1 
to cleanup launcher temp files
2017-05-12 18:04:29,653 [main     ] INFO 
 go.agent.bootstrapper.AgentBootstrapper:111 - Waiting for 10000 ms before 
re-launch....

Using log4j configuration from config/agent-launcher-log4j.properties
Using log4j configuration from config/agent-launcher-log4j.properties
Using log4j configuration from config/agent-launcher-log4j.properties
Using log4j configuration from config/agent-launcher-log4j.properties
Using log4j configuration from config/agent-launcher-log4j.properties
Using log4j configuration from config/agent-launcher-log4j.properties
Using log4j configuration from config/agent-launcher-log4j.properties
Using log4j configuration from config/agent-launcher-log4j.properties
Using log4j configuration from config/agent-launcher-log4j.properties
Using log4j configuration from config/agent-launcher-log4j.properties
Using log4j configuration from config/agent-launcher-log4j.properties


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