Error starting go-agent on v19.7

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Atul Verma

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Aug 15, 2019, 1:55:35 AM8/15/19
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Hi

I am getting an error when go agent fails to start. trace log below. 
OS is : Amazon Linux AMI 2018.03
Java: openjdk version "10.0.2" 2018-07-17
Go agent version: 19.7.0

tried running it on java 1.8 but it fails with same error. any ideas or suggestions

```
STATUS | wrapper  | 2019/08/15 15:48:20 | <-- Wrapper Stopped
STATUS | wrapper  | 2019/08/15 15:49:22 | --> Wrapper Started as Daemon
STATUS | wrapper  | 2019/08/15 15:49:22 | Java Service Wrapper Standard Edition 64-bit 3.5.37
STATUS | wrapper  | 2019/08/15 15:49:22 |   Copyright (C) 1999-2018 Tanuki Software, Ltd. All Rights Reserved.
STATUS | wrapper  | 2019/08/15 15:49:22 |     http://wrapper.tanukisoftware.com
STATUS | wrapper  | 2019/08/15 15:49:22 |   Licensed to ThoughtWorks for GoCD Agent On Linux
STATUS | wrapper  | 2019/08/15 15:49:22 |
STATUS | wrapper  | 2019/08/15 15:49:22 | Launching a JVM...
INFO   | jvm 1    | 2019/08/15 15:49:22 | WrapperManager: Initializing...
INFO   | jvm 1    | 2019/08/15 15:49:22 | [Thu Aug 15 15:49:22 AEST 2019] Starting process:
INFO   | jvm 1    | 2019/08/15 15:49:22 | [Thu Aug 15 15:49:22 AEST 2019]   Working directory    : /var/lib/go-agent
INFO   | jvm 1    | 2019/08/15 15:49:22 | [Thu Aug 15 15:49:22 AEST 2019]   Application arguments: [-serverUrl, https://10.x.x.x:8154/go/]
INFO   | jvm 1    | 2019/08/15 15:49:22 | [Thu Aug 15 15:49:22 AEST 2019]            GoCD Version: 19.7.0-9567
INFO   | jvm 1    | 2019/08/15 15:49:22 | [Thu Aug 15 15:49:22 AEST 2019]            Java Version: 12.0.1
INFO   | jvm 1    | 2019/08/15 15:49:22 | [Thu Aug 15 15:49:22 AEST 2019]        Operating System: Linux(4.14.114-83.126.amzn1.x86_64)
INFO   | jvm 1    | 2019/08/15 15:49:23 | Could not find file `config/agent-bootstrapper-logback.xml'. Attempting to load from classpath.
INFO   | jvm 1    | 2019/08/15 15:49:23 | Using classpath resource `jar:onejar:lib/agent-bootstrapper-19.7.0-9567-classes.jar!/config/agent-bootstrapper-logback.xml'.
INFO   | jvm 1    | 2019/08/15 15:49:23 | SLF4J: Class path contains multiple SLF4J bindings.
INFO   | jvm 1    | 2019/08/15 15:49:23 | SLF4J: Found binding in [jar:onejar:lib/logback-classic-1.2.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
INFO   | jvm 1    | 2019/08/15 15:49:23 | SLF4J: Found binding in [jar:file:/var/lib/go-agent/data/deps-4303b3af29443eb7-agent-launcher.jar/logback-classic-1.2.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
INFO   | jvm 1    | 2019/08/15 15:49:23 | SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
INFO   | jvm 1    | 2019/08/15 15:49:23 | SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]
INFO   | jvm 1    | 2019/08/15 15:49:23 | Could not find file `config/agent-launcher-logback.xml'. Attempting to load from classpath.
INFO   | jvm 1    | 2019/08/15 15:49:23 | Using classpath resource `jar:file:/var/lib/go-agent/data/deps-4303b3af29443eb7-agent-launcher.jar/agent-launcher-18.5.0-6679-classes.jar!/config/agent-launcher-logback.xml'.
INFO   | jvm 1    | 2019/08/15 15:49:25 | java.lang.reflect.InvocationTargetException
INFO   | jvm 1    | 2019/08/15 15:49:25 | at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at java.base/java.lang.reflect.Method.invoke(Unknown Source)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at com.thoughtworks.gocd.Boot.run(Boot.java:89)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at com.thoughtworks.gocd.Boot.main(Boot.java:55)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at java.base/java.lang.reflect.Method.invoke(Unknown Source)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at org.tanukisoftware.wrapper.WrapperJarApp.run(WrapperJarApp.java:451)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at java.base/java.lang.Thread.run(Unknown Source)
INFO   | jvm 1    | 2019/08/15 15:49:25 | Caused by: java.lang.NoClassDefFoundError: javax/xml/bind/DatatypeConverter
INFO   | jvm 1    | 2019/08/15 15:49:25 | at com.thoughtworks.go.agent.launcher.DownloadableFile.matchChecksum(DownloadableFile.java:72)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at com.thoughtworks.go.agent.launcher.DownloadableFile.isChecksumEquals(DownloadableFile.java:79)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at com.thoughtworks.go.agent.launcher.ServerBinaryDownloader.downloadIfNecessary(ServerBinaryDownloader.java:73)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at com.thoughtworks.go.agent.launcher.AgentLauncherImpl.doLaunch(AgentLauncherImpl.java:90)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at com.thoughtworks.go.agent.launcher.AgentLauncherImpl.lambda$launch$0(AgentLauncherImpl.java:68)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at com.thoughtworks.go.logging.LogConfigurator.runWithLogger(LogConfigurator.java:62)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at com.thoughtworks.go.agent.launcher.AgentLauncherImpl.launch(AgentLauncherImpl.java:68)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at com.thoughtworks.go.agent.bootstrapper.AgentBootstrapper.go(AgentBootstrapper.java:78)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at com.thoughtworks.go.agent.bootstrapper.AgentBootstrapper.lambda$main$0(AgentBootstrapper.java:59)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at com.thoughtworks.go.logging.LogConfigurator.runWithLogger(LogConfigurator.java:53)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at com.thoughtworks.go.agent.bootstrapper.AgentBootstrapper.main(AgentBootstrapper.java:59)
INFO   | jvm 1    | 2019/08/15 15:49:25 | ... 12 more
INFO   | jvm 1    | 2019/08/15 15:49:25 | Caused by: java.lang.ClassNotFoundException: javax.xml.bind.DatatypeConverter
INFO   | jvm 1    | 2019/08/15 15:49:25 | at java.base/java.net.URLClassLoader.findClass(Unknown Source)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
INFO   | jvm 1    | 2019/08/15 15:49:25 | at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
INFO   | jvm 1    | 2019/08/15 15:49:25 | ... 23 more
STATUS | wrapper  | 2019/08/15 15:49:27 | <-- Wrapper Stopped

```

thanks
Atul

Ketan Padegaonkar

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Aug 15, 2019, 5:02:37 AM8/15/19
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What gocd version is your server?

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Atul Verma

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Aug 15, 2019, 6:27:09 AM8/15/19
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Hi Ketan

i was able to fix it. It was server version mismatch. server was running 18.5.  i have now downgraded agent to run 18.12.

the java error was a bit tricky. one of the threads mentioned that agents downloads a file from server and that was the clue.

thanks
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