[ https://issues.jboss.org/browse/JBIDE-25894?page=com.atlassian.jira.plugi... ] Mickael Istria commented on JBIDE-25894: ---------------------------------------- I couldn't resist giving it a quick try: About installation and size; I only used the usual UI and have an empty workspace, which is included in measures: Took full Eclipse IDE for Java EE Developers Photon.M6, 409MB Added JBoss Tools support for CDI, Jax-RS and Hibernate (contributing to JDT and so to JDT-LS): +165MB Added JDT-LS from http://download.eclipse.org/jdtls/snapshots/repository/latest : +6MB For a total of 580MB disk footprint. Of course, it can be trimmed down as it includes the whole UI layer not need for a LS, and it also includes Hibernate Tools which come with a plethora of dependencies. Then I tried to start the JDT-LS app with {quote} /usr/bin/java -Declipse.application=org.eclipse.jdt.ls.core.id1 -Dosgi.bundles.defaultStartLevel=4 -Declipse.product=org.eclipse.jdt.ls.core.product -Dlog.level=ALL -noverify -Xmx1G -jar ./plugins/org.eclipse.equinox.launcher_1.5.0.v20180207-1446.jar -configuration ./config_linux -data /home/mistria/sandbox/eclipse-jee-photon-M6-linux-gtk-x86_64/eclipse/ls-data {quote} But startup failed with {quote} !ENTRY org.eclipse.osgi 4 0 2018-04-03 16:15:42.648 !MESSAGE An error occurred while automatically activating bundle org.eclipse.jdt.ls.core (945). !STACK 0 org.osgi.framework.BundleException: Exception in org.eclipse.jdt.ls.core.internal.JavaLanguageServerPlugin.start() of bundle org.eclipse.jdt.ls.core. at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:800) at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:729) at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:1002) at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:354) {quote} Version of org.eclipse.jdt.core.manipulation in my "JBoss Tools language server" is 1.10.0.v20180302-1956 [~fbricon] Which version of Eclipse JDT is supposed to be used for JDT-LS? -- This message was sent by Atlassian JIRA (v7.5.0#75005)