Security warning when launching on Ubuntu Xenial using webstart

[peter@…]

What steps will reproduce the problem?

1. Download josm.jnlp
2. Open the file using web start

What is the expected result?

Josm is started.

What happens instead?

Java Security warning dialog is opened.
"The connection to this website is untrusted"
Note: The certificate is not valid and cannot be used to verify the identity of this website.

Please provide any additional information below. Attach a screenshot if possible.

I could, by adding the url https://josm.openstreetmap.de, to the exception list in java at least continue but the security dialog keeps popping up.

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-03-13 01:17:21 +0100 (Sun, 13 Mar 2016)
Build-Date:2016-03-13 02:35:00
Revision:9979
Relative:URL: ^/trunk

Identification: JOSM/1.5 (9979 en) Linux Ubuntu Xenial Xerus (development branch)
Memory Usage: 260 MB / 1746 MB (48 MB allocated, but free)
Java version: 1.8.0_77-b03, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
VM arguments: [-Djava.security.policy=file:/usr/lib/jvm/java-8-oracle/jre/lib/security/javaws.policy, -DtrustProxy=true, -Djnlpx.home=<java.home>/bin, -Djava.security.manager, -Djnlpx.origFilenameArg=/home/peterm/.java/deployment/cache/6.0/56/1ee8cfb8-2218f9ba, -Djnlpx.remove=false, -Dsun.awt.warmup=true, -Djava.util.Arrays.useLegacyMergeSort=true, -Djnlpx.splashport=55361, -Djnlp.application.href=https://josm.openstreetmap.de/download/josm.jnlp, -Djnlpx.jvm=<java.home>/bin/java, -Djnlpx.vmargs=LURqYXZhLnV0aWwuQXJyYXlzLnVzZUxlZ2FjeU1lcmdlU29ydD10cnVlAC1Eam5scC5hcHBsaWNhdGlvbi5ocmVmPWh0dHBzOi8vam9zbS5vcGVuc3RyZWV0bWFwLmRlL2Rvd25sb2FkL2pvc20uam5scAA=]


Last errors/warnings:
- W: javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateException: Certificate has been denied. Cause: java.security.cert.CertificateException: Certificate has been denied
- W: javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateException: Certificate has been denied. Cause: java.security.cert.CertificateException: Certificate has been denied
- W: Already here java.security.cert.CertificateException: Certificate has been denied
- W: javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateException: Certificate has been denied. Cause: java.security.cert.CertificateException: Certificate has been denied
- W: Already here java.security.cert.CertificateException: Certificate has been denied

[bastiK]

@peter: Does it work with the downloaded .jar file?

@team:

• The JOSM version reported in this ticket is before the recent certificate change (in [9995] and later).
• OS is Xenial, which is due to be released 21 April 2016, but Oracle Java is used, so it shouldn't really matter.

[Don-vip]

Closed as duplicate of #12264.