Please find the logs below, these are just "agent" logs I got from the 
container : 

2022-12-19 19:03:22,364 INFO  [main] ClassPathXmlApplicationContext:583 - 
Refreshing 
org.springframework.context.support.ClassPathXmlApplicationContext@74e52303: 
startup date [Mon Dec 19 19:03:22 UTC 2022]; root of context hierarchy
2022-12-19 19:03:22,398 INFO  [main] XmlBeanDefinitionReader:317 - Loading 
XML bean definitions from class path resource [applicationContext.xml]
2022-12-19 19:03:22,677 INFO  [main] XmlBeanDefinitionReader:317 - Loading 
XML bean definitions from class path resource 
[applicationContext-plugin-infra.xml]
2022-12-19 19:03:23,301 INFO  [main] DefaultListableBeanFactory:821 - 
Overriding bean definition for bean 'pluginLoader' with a different 
definition: replacing [Generic bean: class 
[com.thoughtworks.go.plugin.infra.PluginLoader]; scope=singleton; 
abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; 
autowireCandidate=true; primary=false; factoryBeanName=null; 
factoryMethodName=null; initMethodName=null; destroyMethodName=null; 
defined in URL 
[jar:onejar:lib/go-plugin-infra-22.1.0-13913.jar!/com/thoughtworks/go/plugin/infra/PluginLoader.class]]
 
with [Generic bean: class [com.thoughtworks.go.plugin.infra.PluginLoader]; 
scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; 
autowireCandidate=true; primary=false; factoryBeanName=null; 
factoryMethodName=null; initMethodName=null; destroyMethodName=null; 
defined in class path resource [applicationContext-plugin-infra.xml]]
2022-12-19 19:03:23,633 INFO  [main] 
AutowiredAnnotationBeanPostProcessor:156 - JSR-330 'javax.inject.Inject' 
annotation found and supported for autowiring
2022-12-19 19:03:24,869 INFO  [main] AgentStatusHttpd:90 - Agent status 
HTTP API server running on http://localhost:8152.
2022-12-19 19:03:24,954 INFO  [main] AgentHTTPClientController:96 - 
Configured remoting type: RemotingClient
2022-12-19 19:03:24,972 INFO  [main] ThreadPoolTaskScheduler:166 - 
Initializing ExecutorService 'scheduler'
2022-12-19 19:03:26,004 INFO  [main] DefaultPluginJarChangeListener:67 - 
Plugin load starting: 
/go/plugins/bundled/gocd-yum-repository-poller-plugin.jar
2022-12-19 19:03:26,185 INFO  [scheduler-1] SslInfrastructureService:78 - 
[Agent Registration] Starting to register agent.
2022-12-19 19:03:26,185 INFO  [scheduler-1] SslInfrastructureService:88 - 
[Agent Registration] Fetching token from server.
2022-12-19 19:03:26,193 INFO  [scheduler-1] TokenRequester:56 - The server 
has generated token for the agent.
2022-12-19 19:03:26,195 INFO  [scheduler-1] SslInfrastructureService:91 - 
[Agent Registration] Got a token from server.
2022-12-19 19:03:26,205 INFO  [scheduler-1] SslInfrastructureService:170 - 
This agent is now approved by the server.
2022-12-19 19:03:26,205 INFO  [scheduler-1] SslInfrastructureService:119 - 
[Agent Registration] Retrieved registration from Go server.
2022-12-19 19:03:26,237 INFO  [scheduler-1] SslInfrastructureService:81 - 
[Agent Registration] Successfully registered agent.
2022-12-19 19:03:26,337 INFO  [main] DefaultPluginJarChangeListener:74 - 
Plugin load finished: 
/go/plugins/bundled/gocd-yum-repository-poller-plugin.jar
2022-12-19 19:03:26,346 INFO  [main] DefaultPluginJarChangeListener:67 - 
Plugin load starting: 
/go/plugins/external/abcd-gocd-generic-nexus-task-plugin-1.1.jar
2022-12-19 19:03:26,554 ERROR [scheduler-2] RemotingClient:166 - Server 
responded to action `ping` with: status[422 Unprocessable Entity], body[{
  "message" : "Agent [Agent [3ba812767907, 172.17.0.2, 
d1330c5c-f60e-4de2-beca-bc21859ee99b, null]] has no cookie set; nested 
exception is com.thoughtworks.go.server.service.AgentNoCookieSetException: 
Agent [Agent [3ba812767907, 172.17.0.2, 
d1330c5c-f60e-4de2-beca-bc21859ee99b, null]] has no cookie set"
}]
2022-12-19 19:03:26,556 ERROR [scheduler-2] AgentHTTPClientController:114 - 
Error occurred when agent tried to ping server: 
java.lang.RuntimeException: org.apache.http.client.ClientProtocolException: 
The server returned status code 422. Possible reasons include:
   - This agent has been deleted from the configuration
   - This agent is pending approval
   - There is possibly a reverse proxy (or load balancer) that has been 
misconfigured. See 
https://docs.gocd.org/22.1.0/installation/configure-reverse-proxy.html#agents-and-reverse-proxies
 
for details.
    at 
com.thoughtworks.go.agent.RemotingClient.post(RemotingClient.java:118)
    at com.thoughtworks.go.agent.RemotingClient.ping(RemotingClient.java:74)
    at 
com.thoughtworks.go.agent.AgentHTTPClientController.ping(AgentHTTPClientController.java:109)
    at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
    at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown 
Source)
    at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown 
Source)
    at java.base/java.lang.reflect.Method.invoke(Unknown Source)
    at 
org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
    at 
org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
    at 
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown 
Source)
    at java.base/java.util.concurrent.FutureTask.runAndReset(Unknown Source)
    at 
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown
 
Source)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown 
Source)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown 
Source)
    at java.base/java.lang.Thread.run(Unknown Source)
Caused by: org.apache.http.client.ClientProtocolException: The server 
returned status code 422. Possible reasons include:
   - This agent has been deleted from the configuration
   - This agent is pending approval
   - There is possibly a reverse proxy (or load balancer) that has been 
misconfigured. See 
https://docs.gocd.org/22.1.0/installation/configure-reverse-proxy.html#agents-and-reverse-proxies
 
for details.
    at 
com.thoughtworks.go.agent.RemotingClient.validateResponse(RemotingClient.java:141)
    at 
com.thoughtworks.go.agent.RemotingClient.post(RemotingClient.java:114)
    ... 14 common frames omitted
2022-12-19 19:03:28,110 INFO  [main] DefaultPluginJarChangeListener:74 - 
Plugin load finished: 
/go/plugins/external/abcd-gocd-generic-nexus-task-plugin-1.1.jar
2022-12-19 19:03:28,119 INFO  [main] DefaultPluginJarChangeListener:67 - 
Plugin load starting: 
/go/plugins/external/abcd-gocd-nexus-task-plugin-1.6.jar
2022-12-19 19:03:30,554 INFO  [main] DefaultPluginJarChangeListener:74 - 
Plugin load finished: 
/go/plugins/external/abcd-gocd-nexus-task-plugin-1.6.jar
2022-12-19 19:03:30,562 INFO  [main] DefaultPluginJarChangeListener:67 - 
Plugin load starting: 
/go/plugins/external/gocd-git-path-material-plugin-2.2.0-164.jar
2022-12-19 19:03:31,564 ERROR [scheduler-2] RemotingClient:166 - Server 
responded to action `ping` with: status[422 Unprocessable Entity], body[{
  "message" : "Agent [Agent [3ba812767907, 172.17.0.2, 
d1330c5c-f60e-4de2-beca-bc21859ee99b, null]] has no cookie set; nested 
exception is com.thoughtworks.go.server.service.AgentNoCookieSetException: 
Agent [Agent [3ba812767907, 172.17.0.2, 
d1330c5c-f60e-4de2-beca-bc21859ee99b, null]] has no cookie set"
}]
2022-12-19 19:03:31,564 ERROR [scheduler-2] AgentHTTPClientController:114 - 
Error occurred when agent tried to ping server: 
java.lang.RuntimeException: org.apache.http.client.ClientProtocolException: 
The server returned status code 422. Possible reasons include:
   - This agent has been deleted from the configuration
   - This agent is pending approval
   - There is possibly a reverse proxy (or load balancer) that has been 
misconfigured. See 
https://docs.gocd.org/22.1.0/installation/configure-reverse-proxy.html#agents-and-reverse-proxies
 
for details.
    at 
com.thoughtworks.go.agent.RemotingClient.post(RemotingClient.java:118)
    at com.thoughtworks.go.agent.RemotingClient.ping(RemotingClient.java:74)
    at 
com.thoughtworks.go.agent.AgentHTTPClientController.ping(AgentHTTPClientController.java:109)
    at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
    at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown 
Source)
    at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown 
Source)
    at java.base/java.lang.reflect.Method.invoke(Unknown Source)
    at 
org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
    at 
org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
    at 
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown 
Source)
    at java.base/java.util.concurrent.FutureTask.runAndReset(Unknown Source)
    at 
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown
 
Source)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown 
Source)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown 
Source)
    at java.base/java.lang.Thread.run(Unknown Source)
Caused by: org.apache.http.client.ClientProtocolException: The server 
returned status code 422. Possible reasons include:
   - This agent has been deleted from the configuration
   - This agent is pending approval
   - There is possibly a reverse proxy (or load balancer) that has been 
misconfigured. See 
https://docs.gocd.org/22.1.0/installation/configure-reverse-proxy.html#agents-and-reverse-proxies
 
for details.
    at 
com.thoughtworks.go.agent.RemotingClient.validateResponse(RemotingClient.java:141)
    at 
com.thoughtworks.go.agent.RemotingClient.post(RemotingClient.java:114)
    ... 14 common frames omitted
2022-12-19 19:03:33,363 INFO  [main] DefaultPluginJarChangeListener:74 - 
Plugin load finished: 
/go/plugins/external/gocd-git-path-material-plugin-2.2.0-164.jar
2022-12-19 19:03:33,370 INFO  [main] DefaultPluginJarChangeListener:67 - 
Plugin load starting: /go/plugins/external/script-executor-0.3.0.jar
2022-12-19 19:03:35,825 INFO  [main] DefaultPluginJarChangeListener:74 - 
Plugin load finished: /go/plugins/external/script-executor-0.3.0.jar
2022-12-19 19:03:35,836 INFO  [main] DefaultPluginJarChangeListener:67 - 
Plugin load starting: 
/go/plugins/external/abcd-gocd-nexus-material-plugin-1.1.jar
2022-12-19 19:03:36,571 ERROR [scheduler-2] RemotingClient:166 - Server 
responded to action `ping` with: status[422 Unprocessable Entity], body[{
  "message" : "Agent [Agent [3ba812767907, 172.17.0.2, 
d1330c5c-f60e-4de2-beca-bc21859ee99b, null]] has no cookie set; nested 
exception is com.thoughtworks.go.server.service.AgentNoCookieSetException: 
Agent [Agent [3ba812767907, 172.17.0.2, 
d1330c5c-f60e-4de2-beca-bc21859ee99b, null]] has no cookie set"
}]
2022-12-19 19:03:36,571 ERROR [scheduler-2] AgentHTTPClientController:114 - 
Error occurred when agent tried to ping server: 
java.lang.RuntimeException: org.apache.http.client.ClientProtocolException: 
The server returned status code 422. Possible reasons include:
   - This agent has been deleted from the configuration
   - This agent is pending approval
   - There is possibly a reverse proxy (or load balancer) that has been 
misconfigured. See 
https://docs.gocd.org/22.1.0/installation/configure-reverse-proxy.html#agents-and-reverse-proxies
 
for details.
    at 
com.thoughtworks.go.agent.RemotingClient.post(RemotingClient.java:118)
    at com.thoughtworks.go.agent.RemotingClient.ping(RemotingClient.java:74)
    at 
com.thoughtworks.go.agent.AgentHTTPClientController.ping(AgentHTTPClientController.java:109)
    at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
    at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown 
Source)
    at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown 
Source)
    at java.base/java.lang.reflect.Method.invoke(Unknown Source)
    at 
org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
    at 
org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
    at 
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown 
Source)
    at java.base/java.util.concurrent.FutureTask.runAndReset(Unknown Source)
    at 
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown
 
Source)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown 
Source)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown 
Source)
    at java.base/java.lang.Thread.run(Unknown Source)
Caused by: org.apache.http.client.ClientProtocolException: The server 
returned status code 422. Possible reasons include:
   - This agent has been deleted from the configuration
   - This agent is pending approval
   - There is possibly a reverse proxy (or load balancer) that has been 
misconfigured. See 
https://docs.gocd.org/22.1.0/installation/configure-reverse-proxy.html#agents-and-reverse-proxies
 
for details.
    at 
com.thoughtworks.go.agent.RemotingClient.validateResponse(RemotingClient.java:141)
    at 
com.thoughtworks.go.agent.RemotingClient.post(RemotingClient.java:114)
    ... 14 common frames omitted
2022-12-19 19:03:38,530 INFO  [main] DefaultPluginJarChangeListener:74 - 
Plugin load finished: 
/go/plugins/external/abcd-gocd-nexus-material-plugin-1.1.jar
2022-12-19 19:03:38,540 INFO  [main] DefaultPluginJarChangeListener:67 - 
Plugin load starting: 
/go/plugins/external/abcd-gocd-nexus-component-task-plugin-1.2.jar
2022-12-19 19:03:41,578 ERROR [scheduler-2] RemotingClient:166 - Server 
responded to action `ping` with: status[422 Unprocessable Entity], body[{
  "message" : "Agent [Agent [3ba812767907, 172.17.0.2, 
d1330c5c-f60e-4de2-beca-bc21859ee99b, null]] has no cookie set; nested 
exception is com.thoughtworks.go.server.service.AgentNoCookieSetException: 
Agent [Agent [3ba812767907, 172.17.0.2, 
d1330c5c-f60e-4de2-beca-bc21859ee99b, null]] has no cookie set"
}]
2022-12-19 19:03:41,579 ERROR [scheduler-2] AgentHTTPClientController:114 - 
Error occurred when agent tried to ping server: 
java.lang.RuntimeException: org.apache.http.client.ClientProtocolException: 
The server returned status code 422. Possible reasons include:
   - This agent has been deleted from the configuration
   - This agent is pending approval
   - There is possibly a reverse proxy (or load balancer) that has been 
misconfigured. See 
https://docs.gocd.org/22.1.0/installation/configure-reverse-proxy.html#agents-and-reverse-proxies
 
for details.
    at 
com.thoughtworks.go.agent.RemotingClient.post(RemotingClient.java:118)
    at com.thoughtworks.go.agent.RemotingClient.ping(RemotingClient.java:74)
    at 
com.thoughtworks.go.agent.AgentHTTPClientController.ping(AgentHTTPClientController.java:109)
    at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
    at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown 
Source)
    at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown 
Source)
    at java.base/java.lang.reflect.Method.invoke(Unknown Source)
    at 
org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
    at 
org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
    at 
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown 
Source)
    at java.base/java.util.concurrent.FutureTask.runAndReset(Unknown Source)
    at 
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown
 
Source)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown 
Source)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown 
Source)
    at java.base/java.lang.Thread.run(Unknown Source)
Caused by: org.apache.http.client.ClientProtocolException: The server 
returned status code 422. Possible reasons include:
   - This agent has been deleted from the configuration
   - This agent is pending approval
   - There is possibly a reverse proxy (or load balancer) that has been 
misconfigured. See 
https://docs.gocd.org/22.1.0/installation/configure-reverse-proxy.html#agents-and-reverse-proxies
 
for details.
    at 
com.thoughtworks.go.agent.RemotingClient.validateResponse(RemotingClient.java:141)
    at 
com.thoughtworks.go.agent.RemotingClient.post(RemotingClient.java:114)
    ... 14 common frames omitted
2022-12-19 19:03:42,754 INFO  [main] DefaultPluginJarChangeListener:74 - 
Plugin load finished: 
/go/plugins/external/abcd-gocd-nexus-component-task-plugin-1.2.jar
2022-12-19 19:03:42,762 INFO  [main] DefaultPluginJarChangeListener:67 - 
Plugin load starting: /go/plugins/external/epcc-nexus-gocd-2.0-SNAPSHOT.jar
2022-12-19 19:03:46,231 INFO  [main] DefaultPluginJarChangeListener:74 - 
Plugin load finished: /go/plugins/external/epcc-nexus-gocd-2.0-SNAPSHOT.jar
2022-12-19 19:03:46,232 INFO  [scheduler-1] AgentHTTPClientController:139 - 
About to get cookie from the server.
2022-12-19 19:03:46,243 INFO  [scheduler-1] AgentHTTPClientController:142 - 
Got cookie: 0838ac28-be1e-4965-a6ca-833b2c2ba63b
2022-12-19 19:03:56,343 INFO  [scheduler-1] HttpService:125 - Got back 200 
from server
2022-12-19 19:03:56,344 INFO  [scheduler-1] DefaultGoPublisher:88 - Agent 
[3ba812767907, 172.17.0.2, d1330c5c-f60e-4de2-beca-bc21859ee99b] is 
reporting status [Preparing] to Go Server for Build 
[Q3UNIT-Infra-QA/9/GetNexusArtifact/37/GetNexusArtifact/142012]
2022-12-19 19:03:56,393 INFO  [scheduler-1] HttpService:125 - Got back 200 
from server
2022-12-19 19:03:56,394 INFO  [scheduler-1] DefaultGoPublisher:88 - Agent 
[3ba812767907, 172.17.0.2, d1330c5c-f60e-4de2-beca-bc21859ee99b] is 
reporting status [Building] to Go Server for Build 
[Q3UNIT-Infra-QA/9/GetNexusArtifact/37/GetNexusArtifact/142012]
2022-12-19 19:03:57,122 INFO  [scheduler-1] HttpService:125 - Got back 200 
from server
2022-12-19 19:03:57,123 INFO  [scheduler-1] DefaultGoPublisher:94 - Agent 
[3ba812767907, 172.17.0.2, d1330c5c-f60e-4de2-beca-bc21859ee99b] is 
reporting build result [Passed] to Go Server for Build 
[Q3UNIT-Infra-QA/9/GetNexusArtifact/37/GetNexusArtifact/142012]
2022-12-19 19:03:57,153 INFO  [scheduler-1] HttpService:125 - Got back 200 
from server
2022-12-19 19:03:57,154 INFO  [scheduler-1] DefaultGoPublisher:88 - Agent 
[3ba812767907, 172.17.0.2, d1330c5c-f60e-4de2-beca-bc21859ee99b] is 
reporting status [Completing] to Go Server for Build 
[Q3UNIT-Infra-QA/9/GetNexusArtifact/37/GetNexusArtifact/142012]
2022-12-19 19:03:57,180 INFO  [scheduler-1] ArtifactsPublisher:68 - 
Pluggable metadata folder is empty.
2022-12-19 19:03:57,180 INFO  [scheduler-1] DefaultGoPublisher:100 - Agent 
[3ba812767907, 172.17.0.2, d1330c5c-f60e-4de2-beca-bc21859ee99b] is 
reporting build result [Passed] to Go Server for Build 
[Q3UNIT-Infra-QA/9/GetNexusArtifact/37/GetNexusArtifact/142012]
2022-12-19 19:03:57,185 INFO  [scheduler-1] HttpService:125 - Got back 200 
from server
2022-12-19 19:03:57,238 INFO  [scheduler-1] DefaultGoPublisher:82 - 
Stopping Transmission for Build 
[Q3UNIT-Infra-QA/9/GetNexusArtifact/37/GetNexusArtifact/142012]


On Monday, December 19, 2022 at 8:46:30 AM UTC-6 Veenu Official wrote:

> Thank you so much Chad. I will analyse the logs /godata/logs/agent.log and 
> get back to you soon.
>
> On Saturday, December 17, 2022 at 10:37:18 PM UTC-6 Chad Wilson wrote:
>
>> Hi
>>
>> I haven't looked into your specific case in detail (there's not enough 
>> logging here as it is), however the general challenge of "ensure elastic 
>> agent startup time is as optimal as possible" is one I am interested in 
>> improving, especially with some help from the community in figuring out 
>> what is happening.
>>
>> In 22.3.0 I made a change to reduce some redundant sleeps 
>> <https://github.com/gocd/gocd/pull/10759/commits/41d67fa7b4d9618ee50c35739af62400824a534c>
>>  
>> specific to when the agent needs to update the version to synchronize with 
>> the server at startup (very common for elastic agents, which tend to not 
>> have any persistent storage to cache the up-to-date agent launcher and jar 
>> versions), however that doesn't specifically deal with the errors below 
>> where the agent tries to negotiate with the server to become authorised. It 
>> might take 20s in "total" time" with earlier versions, but I don't think 
>> you should see those "no cookie set" errors for *all* of those 20 
>> seconds, if working correctly - perhaps just one at the end.
>>
>> The *ping* operation is independent of the main loop that retrieves work 
>> and ensures the cookie is present, so it's conceptually possible you can 
>> get some of these *ping *errors during startup before it has fully 
>> registered and retrieved the cookie, but not exactly sure what is going on 
>> there.
>>
>> To understand further, you might want to look at the fuller logs from an 
>> agent's perspective. IIRC not all the logs that might be useful will be 
>> seen in the agent's stdout, but you should be able to see the fuller 
>> lifecycle of what is happening from the agent's perspective inside the 
>> /godata/logs/agent.log (if running as a container) which should show which 
>> part of the start-up and work loop the agent is working on. If you can 
>> build a timeline of important events we can probably figure out what is 
>> going on and the right bits to be optimised.
>>
>> -Chad
>>
>> On Fri, Dec 16, 2022 at 11:53 PM Veenu Official <[email protected]> 
>> wrote:
>>
>>> We have these errors coming up on Elastic Agent Container Start up and 
>>> it occurs 4 times or more. Every time it takes 5 seconds and then it is a 
>>> loop of 5 seconds for 4 times, so we are trying to optimize the time by 
>>> getting rid of these errors.
>>>
>>> Please let me know if anyone has been able to resolve these errors. It 
>>> would be greatly helpful.
>>>
>>>
>>>
>>> 2022-12-13T09:20:50.605-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - 2022-12-13 15:20:50,583 ERROR [scheduler-2] RemotingClient:166 - 
>>> Server responded to action `ping` with: status[422 Unprocessable Entity], 
>>> body[{
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - "message" : "Agent [Agent [d1c6f1714063, 172.17.0.3, 
>>> 50392830-07ba-4475-8061-67293edd1015, null]] has no cookie set; nested 
>>> exception is com.thoughtworks.go.server.service.AgentNoCookieSetException: 
>>> Agent [Agent [d1c6f1714063, 172.17.0.3, 
>>> 50392830-07ba-4475-8061-67293edd1015, null]] has no cookie set"
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - }]
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - 2022-12-13 15:20:50,584 ERROR [scheduler-2] 
>>> AgentHTTPClientController:114 - Error occurred when agent tried to ping 
>>> server:
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - java.lang.RuntimeException: 
>>> org.apache.http.client.ClientProtocolException: The server returned status 
>>> code 422. Possible reasons include:
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - - This agent has been deleted from the configuration
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - - This agent is pending approval
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - - There is possibly a reverse proxy (or load balancer) that has 
>>> been misconfigured. See 
>>> https://docs.gocd.org/22.1.0/installation/configure-reverse-proxy.html#agents-and-reverse-proxies
>>>  
>>> for details.
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - at com.thoughtworks.go.agent.RemotingClient.post
>>> (RemotingClient.java:118)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - at 
>>> com.thoughtworks.go.agent.RemotingClient.ping(RemotingClient.java:74)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - at 
>>> com.thoughtworks.go.agent.AgentHTTPClientController.ping(AgentHTTPClientController.java:109)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - at 
>>> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native 
>>> Method)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - at 
>>> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown 
>>> Source)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - at 
>>> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown 
>>> Source)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - at java.base/java.lang.reflect.Method.invoke(Unknown Source)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - at 
>>> org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - at 
>>> org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - at 
>>> java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown 
>>> Source)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - at java.base/java.util.concurrent.FutureTask.runAndReset(Unknown 
>>> Source)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - at 
>>> java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown
>>>  
>>> Source)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,584 
>>> [stdout] - at 
>>> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,585 
>>> [stdout] - at 
>>> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,585 
>>> [stdout] - at java.base/java.lang.Thread.run(Unknown Source)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,585 
>>> [stdout] - Caused by: org.apache.http.client.ClientProtocolException: The 
>>> server returned status code 422. Possible reasons include:
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,585 
>>> [stdout] - - This agent has been deleted from the configuration
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,585 
>>> [stdout] - - This agent is pending approval
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,585 
>>> [stdout] - - There is possibly a reverse proxy (or load balancer) that has 
>>> been misconfigured. See 
>>> https://docs.gocd.org/22.1.0/installation/configure-reverse-proxy.html#agents-and-reverse-proxies
>>>  
>>> for details.
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,585 
>>> [stdout] - at 
>>> com.thoughtworks.go.agent.RemotingClient.validateResponse(RemotingClient.java:141)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,585 
>>> [stdout] - at com.thoughtworks.go.agent.RemotingClient.post
>>> (RemotingClient.java:114)
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:50,585 
>>> [stdout] - ... 14 common frames omitted
>>>     2022-12-13T09:20:51.811-06:00    jvm 1 | 2022-12-13 15:20:51,714 
>>> [stdout] - 2022-12-13 15:20:51,713 INFO [main] 
>>> DefaultPluginJarChangeListener:74 - Plugin load finished: 
>>> /go/plugins/external/epsilon-gocd-nexus-component-task-plugin-1.2.jar
>>>     2022-12-13T09:21:06.760-06:00    jvm 1 | 2022-12-13 15:20:51,724 
>>> [stdout] - 2022-12-13 15:20:51,724 INFO [main] Defaul
>>>         No newer events at this moment. Auto retrying... 
>>> Pause 
>>>
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