[Solved]-How to find out why Eclipse Xhtml Editor hangs-eclipse

are you using devstudio 10.2 as installed from eclipse marketplace (or other update site) into an existing eclipse neon.1 install?

if so, you could try playing with your memory settings in eclipse.ini. or, try using the devstudio installer, which will give you different memory settings in devstudio.ini.

https://developers.redhat.com/products/devstudio/download/

if you're not already on devstudio 10.2, you could try updating to the latest.

but if it's not a memory problem... then you might want to report this as a bug in jira here:

https://issues.jboss.org/secure/createissue.jspa?pid=10020&issuetype=1 using component = jsp/jsf/xml/html-source-editing

could you also attach a sample project or .xhtml file to that jira, which causes the freeze, so someone can reproduce your issue?