Plugin Installer

[1569637105]

There is a Note: Missing modules may be published on Update Centers. Please run "Check for Newest" from the "Available Plugins" tab.
VisualVM Version 2.1.2 Generated when the plug-in is installe

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[thurka]

I don't have any problem installing Visual GC plugin version 2.1.3 in VisualVM 2.1.2. Did you invoked "Check for Newest" from the "Available Plugins" tab? Can you please provide steps to reproduce and also can you attach messages.log file? Thanks.

[1569637105]

Since my JDK version is 11.0.11, I downloaded version 2.1.2 from the official website. When I open the software, I go directly to the plug-in to download GC. While I was in the middle of downloading, an abnormal download occurred and was terminated. Then I configured the plugin center link based on the blogs on the web. Then when I downloaded it again, the problem I reported above appeared. I also tried to download the GC plug-in "Add Plugins..." and install it, but it still didn't work
messages.log
messages2.log
.

[thurka]

Since my JDK version is 11.0.11, I downloaded version 2.1.2 from the official website. When I open the software, I go directly to the plug-in to download GC. While I was in the middle of downloading, an abnormal download occurred and was terminated.

What do you mean by 'abnormal download occurred'? What was terminated? Download or VisualVM?

Then I configured the plugin center link based on the blogs on the web.

This is not needed. Default plugin center link is OK. Which blog did you use?

Then when I downloaded it again, the problem I reported above appeared. I also tried to download the GC plug-in "Add Plugins..." and install it,

Where did you download the plugin from? It looks like really old version, which is not compatible with current version VisualVM.

but it still didn't work

What it does?

messages.log
messages2.log

Thanks for the log file, messages2.log shows that there is problem with network connectivity:

Writing content of URL https://visualvm.github.io/uc/release212/updates.xml.gz?unique=0f0985837-6283-43fb-b0b8-cf5d137ca031_dc7b5036-b167-4971-a181-efb72bc8c92e failed.
java.net.SocketTimeoutException: Read timed out
	at java.base/java.net.SocketInputStream.socketRead0(Native Method)
	at java.base/java.net.SocketInputStream.socketRead(SocketInputStream.java:115)
	at java.base/java.net.SocketInputStream.read(SocketInputStream.java:168)
	at java.base/java.net.SocketInputStream.read(SocketInputStream.java:140)
	at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:478)
	at java.base/sun.security.ssl.SSLSocketInputRecord.readFully(SSLSocketInputRecord.java:461)
	at java.base/sun.security.ssl.SSLSocketInputRecord.decodeInputRecord(SSLSocketInputRecord.java:243)
	at java.base/sun.security.ssl.SSLSocketInputRecord.decode(SSLSocketInputRecord.java:181)
	at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:110)
	at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1372)
	at java.base/sun.security.ssl.SSLSocketImpl.readApplicationRecord(SSLSocketImpl.java:1339)
	at java.base/sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:959)
	at java.base/java.io.BufferedInputStream.fill(BufferedInputStream.java:252)
	at java.base/java.io.BufferedInputStream.read1(BufferedInputStream.java:292)
	at java.base/java.io.BufferedInputStream.read(BufferedInputStream.java:351)
	at java.base/sun.net.www.MeteredStream.read(MeteredStream.java:134)
	at java.base/java.io.FilterInputStream.read(FilterInputStream.java:133)
	at java.base/sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:3510)
	at java.base/java.io.BufferedInputStream.fill(BufferedInputStream.java:252)
	at java.base/java.io.BufferedInputStream.read1(BufferedInputStream.java:292)
	at java.base/java.io.BufferedInputStream.read(BufferedInputStream.java:351)
	at java.base/java.io.FilterInputStream.read(FilterInputStream.java:107)

Are you behind proxy server?

[1569637105]

-- What do you mean by "abnormal download"? What is termination? Download or VisualVM?
This refers to the installation of the GC when an exception occurred and the GC terminated the installation.

-- Where did you download the plugin? It looks very old and is not compatible with the current version of VisualVM.
https://visualvm.github.io/uc/8u131/updates.html

-- What can it do?
This refers to the（I also tried downloading the GC plugin "Add Plugins..." And install) still cannot install.

-- Are you behind the proxy server?
I operate from the Intranet. Not a proxy server

[thurka]

-- Where did you download the plugin? It looks very old and is not compatible with the current version of VisualVM. https://visualvm.github.io/uc/8u131/updates.html

This is plugin center for Java VisualVM (bundled with JDK 8) and released in 2017. Please refer to https://visualvm.github.io/pluginscenters.html and select the link for VisualVM version you are using. In your case for VisualVM 2.1.2 use https://visualvm.github.io/uc/release212/updates.html

-- Are you behind the proxy server?
I operate from the Intranet. Not a proxy server

Well according to exception from the log file, JDK have problem connecting to github website to download plugin itself. So you have to download right plugin manually and install it via "Add Plugins...".

[1569637105]

Thank you very much for your details! VisualVM2.1.2 installation GC issue. Can be obtained by manual download at https://visualvm.github.io/uc/release212/updates.html GC 2.1.3 version of the plugin and through the "add plug-ins..." Install. Problem solved!