Chapter 1. Eclipse 4.18

Significant package updates on RHEL 7

eclipse 4.17 4.18

Eclipse IDE and JDT/PDE plug-ins have been updated to version 4.18. For a more complete list of changes, see the Eclipse 4.18 – New and Noteworthy page. Notable enhancements include:

• In the Console preference page it is now possible to select the new preference "Enable word wrap".
• In the Appearance preference page the new "System" theme is now available. It uses system colors to integrate smoothly into your operating system or operating system theme.
• Eclipse JDT has been updated to use JUnit 5.7.
• New clean up options and code formatting options have been added to Java Development Tools.
• In the Arguments tab for Java-based launch configurations (Java Application, JUnit, and others), you can now select the new checkbox to write arguments into an @argfile.

eclipse-egit/jgit 5.9.0 5.10.0

The Git integration plug-ins have been updated to version 5.10.0. For details, see the upstream EGit 5.10.0 release notes and JGit 5.10.0 release notes.

eclipse-m2e 1.16.2 1.17.1

The Maven integration plug-in has been updated to version 1.17.1.

Known issues on RHEL 7

Initializing Eclipse Error Reporting System error

This error occurs when running a workspace created in an older version of Eclipse.

To work around this problem, start Eclipse with the -clean option to clear its dependency resolution cache:

$ scl enable rh-eclipse "eclipse -clean"

Eclipse will start without this error message.

NullPointerExceptions

NullPointerExceptions can occur when you install a plug-in from a third-party update site. In that case, Eclipse fails to start with a NullPointerException in the workspace log file.

To work around this problem, restart Eclipse with the -clean option to clear its dependency resolution cache:

On RHEL 7:

$ scl enable rh-eclipse "eclipse -clean"

Eclipse will start normally.

The rh-eclipse-tycho package conflicts with the same package from earlier collections

For example: rh-eclipse48-tycho:

As a result, the installation of the rh-eclipse-tycho package may fail when the rh-eclipse48-tycho package is already installed.

You only need Tycho if you want to build or rebuild Eclipse or its plug-ins need Tycho. If needed, uninstall the rh-eclipse48-tycho package before installing the rh-eclipse-tycho package using this command:

$ yum remove rh-eclipse48-tycho

The installation of the rh-eclipse-tycho package will now succeed.

The rh-eclipse-scldevel package conflicts with packages from earlier collections

For example: rh-maven36-scldevel:

As a result, the installation of the rh-maven36-scldevel package may fail when the rh-maven35-scldevel package is already installed.

To solve this problem, uninstall the rh-maven35-scldevel package before installing the new version of rh-eclipse-scldevel using this command:

$ yum remove rh-maven35-scldevel

The installation of rh-eclipse-scldevel will now succeed.

Incompatibilities between Eclipse Subclipse and base RHEL Subversion

Working copies of Subversion repositories created with Eclipse Subclipse are incompatible with the base RHEL version of Subversion. Using the svn command on such working copies may result in the following error:

$ svn up
svn: E155021: This client is too old to work with the working copy

To work around this problem, use the pure Java implementation of Subversion used by Eclipse Subclipse on the command line:

# yum install rh-eclipse-svnkit-cli # Command line support for SVNKit

Now, use the jsvn command anywhere you would normally use the svn command:

$ jsvn up
Updating '.':
At revision 16476.

Lambda expression evaluation failed due to unexpected argument types

During compilation, some lambda expressions used in conditional breakpoints or Expression view are falsely assigned an Object variable type.