mbien commented on issue #6680:
URL: https://github.com/apache/netbeans/issues/6680#issuecomment-1834291798
found
```java
System.setProperty("javax.net.debug", "ssl:handshake");
```
to be useful for SSL debugging. But it produces a lot of output with is
mixed with the test output which is also a lot. Would be interesting to diff
the two https handshake logs of the gradle `Downloader` with and without the
workaround.
exception snippet taken from the PR:
```
Caused by: javax.net.ssl.SSLHandshakeException: Received fatal alert:
handshake_failure
at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:131)
at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:117)
at
java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:347)
at
java.base/sun.security.ssl.Alert$AlertConsumer.consume(Alert.java:293)
at
java.base/sun.security.ssl.TransportContext.dispatch(TransportContext.java:186)
at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:172)
at
java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1511)
at
java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1421)
at
java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:456)
at
java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:427)
at
java.base/sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:580)
at
java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:201)
at
java.base/sun.net.www.protocol.http.HttpURLConnection.followRedirect0(HttpURLConnection.java:2830)
at
java.base/sun.net.www.protocol.http.HttpURLConnection.followRedirect(HttpURLConnection.java:2742)
at
java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1869)
at
java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1525)
at
java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:250)
at org.gradle.wrapper.Download.downloadInternal(Download.java:129)
at org.gradle.wrapper.Download.download(Download.java:109)
```
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