Error downloading plug-in - VMware Skyline Health & Diagnostics Plugin

Products

VMware vCenter Server

Issue/Introduction

The error can be seen repeating in the recent Tasks

Error downloading plug-in. URL is unreachable. connect timed out VMware Skyline Health & Diagnostics Plugin com.vmware.vhd.management.plugin:1.0.0.0)

There are also errors in the /var/log/vmware/vsphere-ui/logs/vsphere_client_virgo.log

[YYYY-MM-DDTHH:MM:SS.SSSZ] [ERROR] sdk-plugin-deployer-108358 com.vmware.vise.plugin.status.RemotePluginStatusServiceImpl DOWNLOAD_FAILED: Error downloading plugin package com.vmware.vhd.management.plugin:1.0.0.0 from https://###.###.###.###:443/plugins/assets/plugins.zip. Reason: URL is unreachable. Make sure that the URL is reachable.
[YYYY-MM-DDTHH:MM:SS.SSSZ] [ERROR] sdk-plugin-deployer-108358 com.vmware.vise.plugin.extension.VcExtensionManager Downloading plugin package: 'com.vmware.vhd.management.plugin:1.0.0.0' registered in vCenter: 'vcsa.example.com (b249c666-8de8-4b0a-bc44-3585f9b4e5b3)' has failed. java.util.concurrent.CompletionException: com.vmware.vise.plugin.download.PluginDownloadException: org.apache.http.conn.ConnectTimeoutException: Connect to ###.###.###.###:443 [/###.###.###.###] failed: connect timed out
at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1643)
at com.vmware.vise.util.concurrent.QueuingCachedThreadPool$2.call(QueuingCachedThreadPool.java:873)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at com.vmware.vise.util.concurrent.QueuingCachedThreadPool$QueueProcessor.run(QueuingCachedThreadPool.java:1271)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at com.vmware.vise.util.concurrent.WorkerThreadFactory$1.run(WorkerThreadFactory.java:64)
at java.lang.Thread.run(Thread.java:750)
Caused by: com.vmware.vise.plugin.download.PluginDownloadException: org.apache.http.conn.ConnectTimeoutException: Connect to ###.###.###.###:443 [/###.###.###.###] failed: connect timed out
at com.vmware.vise.plugin.download.PluginDownloadServiceImpl.download(PluginDownloadServiceImpl.java:195)
at com.vmware.vise.plugin.async.task.PluginDownloadTask.run(PluginDownloadTask.java:51)
at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1640)
... 9 common frames omitted
Caused by: org.apache.http.conn.ConnectTimeoutException: Connect to ###.###.###.###:443 [/###.###.###.###] failed: connect timed out
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:151)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:376)
at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:393)
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186)
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:72)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:221)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:165)
at com.vmware.vise.plugin.download.PluginDownloadServiceImpl.downloadPackageInfo(PluginDownloadServiceImpl.java:342)
at com.vmware.vise.plugin.download.PluginDownloadServiceImpl.download(PluginDownloadServiceImpl.java:172)
... 11 common frames omitted
Caused by: java.net.SocketTimeoutException: connect timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:607)
at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:368)
at com.vmware.vise.plugin.http.impl.RequestAwareSslSocketFactory.connectSocket(RequestAwareSslSocketFactory.java:52)
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)
... 23 common frames omitted

[YYYY-MM-DDTHH:MM:SS.SSSZ] [INFO ] sdk-plugin-deployer-108358 com.vmware.vise.plugin.registry.VcExtensionStateRegistry Updating entry: Plugin: 'com.vmware.vhd.management.plugin:1.0.0.0', State: 'FAILED_DOWNLOAD'

Environment

vCenter 8.0

Resolution

Unregister the extension from the Managed Object Browser (MOB) from the vCenter

Take a proper snapshot of the vCenter
- VMware vCenter in Enhanced Linked Mode pre-changes snapshot (online or offline) best practice
Browse to https://vcsa.example.com/mob/?moid=ExtensionManager&method=unregisterExtension
- Sign in as [email protected] (or similar vCenter SSO administrator user)
In the extensionKey value enter "com.vmware.vhd.management.plugin" without quotes
Press the Invoke method link at the bottom right

This will then stop the task from trying to download the plugin and fully remove the Skyline Health & Diagnostics plugin from the vCenter.