I'm using eclipse checkstyle plugin with Juno Eclipse distribution. Anytime the code is checked for checkstyle error I get the following error:
cannot initialize module TreeWalker - Unable to instantiate DoubleCheckedLocking
Does anybody know how to fix this problem? Is it a plugin compatibility issue or something else?
The DoubleCheckedLocking check has been removed in Checkstyle 5.6 and must be manually removed from your Checkstyle configuration.
See also: http://sourceforge.net/tracker/index.php?func=detail&aid=3571442&group_id=29721&atid=397078
Open the Checkstyle preferences, create your own Check Configuration, go into your own check configuration, find the TreeWalker module, click it and then un-check the DoubleCheckedLocking. As simple as that.
just comment or remove "DoubleCheckedLocking" from the checkstyle file and it will work
Under your Eclipse Workspace Search for file internal_config__*.xml
Remove the following line from the file
<module name="DoubleCheckedLocking"/>
Reload Workspace.
This will work for any discontinued module which produces the error message "Unable to instantiate"
Related
I had made an maven project and it worked fine.
Then I installed plugins
EclEmma Java Code Coverage,
PHP Development Tools (PDT),
Eclipse.orgSonarQube
Then I worked on some other project. When I again wanted to create an maven project,it threw the following error window which said
The selected wizard could not be started
reason
plug-in org.eclipse.m2e.core.ui was unable to load class
org.eclipse.m2e.core.ui.internal wizards.MavenProjectWizard
Removed SonarQube plugin .This solved the issue.
Now it works all fine.
But is there any other solution to this problem since I have to use sonar.
Click on eclipse help tab and open installation details search sonar and remove all related plugins.
That's not quite the right characterization of what it says on the page,Please check your .log file /path/workspace/.metadata/
Find the correct plugin which is causing this problem and update to compatible version of the plugin with eclipse version.
To find the hidden files in the workspace use Ctrl+H
I had the same problem, and I've tried so many solutions. But what I did to solve the problem, is that I just upgraded my Eclipse IDE (2019-06 to 2020-03) by following these steps (from https://wiki.eclipse.org/FAQ_How_do_I_upgrade_Eclipse_IDE%3F) :
You first need to add the new release's repository as follows:
1-1. Window > Preferences > Install/Update > Available Software Sites
1-2. Click 'Add'
1-3. Enter the URL https://download.eclipse.org/releases/2020-03/
1-4. Click 'Ok'
Help > Check for Updates
If updates are found, proceed through the install wizard and restart the IDE when
prompted. Otherwise, read carefully the error message to find out which component
is conflicting and establish your resolution strategy.
Note that the start splash screen may be cached and will not necessarily be
updated to the latest version after the IDE is restarted. Performing a full
relaunch should display the new version number.
I´m beginning with Acceleo.
I installed eclipse-modeling-luna-M6-win32.
Then i installed acceleo by update on eclipse.
(is there any better option?)
Trying to use the uml2java example.
To run it i tried to run org.eclipse.acceleo.examples.uml2java.
It gave me:
Error
Couldn't load class org.eclipse.acceleo.examples.uml2java.main.Uml2java from project org.eclipse.acceleo.examples.uml2java
Couldn't load class org.eclipse.acceleo.examples.uml2java.main.Uml2java. Check that its containing package is exported.
I did not change the code.
I checked the MANIFEST and it has on the runtime: org.eclipse.acceleo.examples.uml2java.main
I also saw that there is an UI project that as i understand is a plugin but i don´t know what to do with it (so that it will create a new menu on eclipse).
Any help is appreciated!!
Thanks.
it worked using eclipse indigo with the latest acceleo. i don´t know if it´s possible to use a more recent eclipse version. also works with eclipse kepler.
This fixed the problem for me. Try adding the "bin/" directory to the Classpath in the Manifest file.
Right click the MANIFEST.MF file and "Open With >" "Plug-in Manifest Editor".
This gives some tabs at the bottom. Use the "Runtime" tab. On the bottom right of this screen there is a place to edit the classpath. Add "bin/".
I got this idea from Etienne's answer in: Can't generate java from UML using Acceleo in Eclipse
I am running eclipse (Eclipse for PHP Developers).
After installing JSLint plugin from Rockstartapps (http://update.rockstarapps.com), the plugin don't validate.
When I am trying to apply validation to particular file (Right click on the file -> Rockstarapps -> Validate with JSLint...) it does absolutely nothing.
When saving a file it throws eclipse error:
Errors occurred during the build.
Errors running builder 'Rockstarapps JsLint Builder' on project 'testapp'.
java.lang.NullPointerException
Any clue why this happens?
Update
Found a very good replacement solution. Works completely the same as plugin by Rockstarapps worked before, perhaps rules are even a bit updated.
Looks like a bug in that plug-in.
I have a web app built with Maven.
Most of the time, I built the application using Intellij IDEA, but now I want to import the application in Eclipse to see something in this IDE.
After mvn eclipse:eclipse, I add in Eclipse the app, but when I try to add the app to the server (tomcat), I receive:
There are no resources that can be added or removed from the server
Solutions?
You need the project to have a Eclipse Dynamic Web Module facet. You can try doing this via the project properties dialog and looking at project facets, then clicking the appropriate check box. This may not be available however, so you may need to do the next thing.
Create a backup of your project and follow the directions at dzone.com. This'll allow you to modify the project facets via your eclipse .project file.
Keep in mind, once you add those facets, you cannot change them back via Eclipse. Definitely make sure you have a backup before starting.
This step worked for me:
Right-Click on the Project Name, then
Maven-->Update Project..
Click OK
After doing this I was able to see my project in Add/Remove Programs.
As mentioned somewhere else adding Eclipse WTP didn't do any good, however I performed the above step after I had already added Eclipse WTP, so I am guessing that may not be needed.
This was done for Eclipse Juno.
Hope this helps someone.
Edited: You can follow this link as above mentioned I think might have needed WTP and that add a lot of other things into the workspace.
http://blog.teamextension.com/maven-as-eclipse-dynamic-web-module-556
Check whether Maven Integration for Eclipse WTP is installed. If not, install it from Eclipse Marketplace
After installation restart Eclipse
Right click your project and Maven--> update project configuration
Delete tomcat and re create tomcat (clean tomcat,add your project,publish and enjoy)
I've got Tomcat 6, Java 1.6, and was trying to get it to work in Eclipse Juno Service Release 1's "internal server" (whatever that's called.) Here's what I did that worked for me:
(Found these instructions at http://www.mkyong.com/eclipse/eclipse-ide-tomcat-version-6-0-only-supports-j2ee-1-2-1-3-1-4-and-java-ee-5-web-modules/)
I should point out that I followed ClutchDude's instructions to make my project a Dynamic Web Module facet. It didn't work on its own for me, but maybe it was part of making it work in the end.
Using Eclipse (or other text editor), open the file
.settings/org.eclipse.wst.common.project.facet.core.xml
Find the line that reads
<installed facet="jst.web" version="3.0"/>
3.0 is for Tomcat 7.x (so says mkyong.) Change it to 2.5 (or 2.4).
I restarted Eclipse and it worked for my project.
The reason why this is happening is because eclipse by default looks for the deployment descriptor in the folder {project.home}/Webcontent/WEB-INF/web.xml where as the Maven puts them in src/main/webapp/WEB-INF/web.xml.
So when you are trying to add your project onto the server eclipse cannot find a deployment descriptor and hence you get the annoying message.
This can be solved by adding the following entries in .settings/org.eclipse.wst.common which can be found in
Project home folder in your workspace if it is a new maven project.
The folder where you already imported from if you are using Import -> Maven projects.
Make the following changes in to the org.eclipse.wst.common
wb-resource deploy-path="/" source-path="/src/main/webapp"/. Add this entry.
Edit --> property name="java-output-path"
Please check the following link from more details. http://java.dzone.com/articles/webapps-eclipse-and-maven.
The comments section has an excellent example with a working project.
This issue was fixed for me my installing additional eclipse modules. in particular, the ones related to m2e-wtp. just do a search for m2e in the plugins search listing for your version of eclipse
If you face an error like "There are no resources that can be added or removed from the server",
then
1) Go to the META_INF of your websvcsEAR and go to the application.xml.
2) Goto modules-> clickDetails and add the module that is existing. i.e., some EAR which your project demands.
3) Click ok
4) Now go to your server -> right click -> add and remove -> add your EAR.
Maybe you don't need add your application to the server's configuration. I think that you must use m2e eclipse plugin in order to launch the app.
For example, in your eclipse you will see a contextual menu called "Run as" if you right-click on your pom file. You can clicking on "Maven build" and Maven will download all the information needed to start tomcat.
I hope this helps you.
I used
mvn eclipse:eclipse -Dwtpversion=2.0
in command line in the folder where I had my pom.xml. Then I refreshed the project in eclipse IDE. After that I was able to add my project.
I was able to resolve this by removing my EAR project from my Eclipse workspace, then re-importing it.
Well, with a Spring and maven project, i got it that way:
Eclipse Version: 2019-06 (4.12.0)
Java 1.8
Tomcat 7
Yes, go to Project Properties >> Facets >> select Dynamic Web Module but dont apply yet!!!
Right under, it should appear a link Further Configuration Available. Click on it, otherwise one will have to edit .settings/org.eclipse.wst.common.component manually. Update source directory to src/main/java. (source)
Then in Facets window check Java - mine was pointing to 11 even though i don't have Java 11 installed or configured like a JRE runtime. I could only add/remove when changed to 1.8. (source). Note: That was really the problem, why don't Eclipse get this configuration automatically from the project?
Finally Eclipse creates some directories like WEB-INF and META-INF, just delete them.
I just downloaded Eclipse SDK 3.5.1 and want to install some add ons such as GEF, EMF, etc.
I downloaded all the zip files for everything I needed and decided to install them in the dropins folder. I read http://wiki.eclipse.org/Equinox_p2_Getting_Started and structured my dropin folder as specified:
eclipse/
dropins/
emf/
eclipse/
features/
plugins/
gef/
eclipse/
features/
plugins/
... etc ...
When I start up Eclipse it does not recognize any of the features or plugins I have put into the structure above. Any ideas?
This is probably a bit late to help you, but maybe it will help somebody else. I had a similar problem, so I posted a question to the Eclipse Community Forums asking about how to get a report about missing dependencies. Mickael Istria's helpful reply is shown below for those who aren't members of that forum:
You can start or diag the OSGi Console and try to start the bundle manually. The console will print you some warnings. See http://eclipse.org/equinox/documents/quickstart.php and for more details.
shell> eclipse -console
[...Eclipse starts up...]
osgi> diag your.unresolved.bundle
[...shows you unresolved constraints...]
In my case, I tried several directory structures that I thought should work, before I found one that did:
dropins/
myPlugin
plugins/
depPluginDir1/*
depPluginDir2/*
Coming back years later to solve a similar problem..., I found the following web pages to be helpful: Where is My Bundle, Plug-ins are not picked up from the dropins/ folder.
First of all, run eclipse with -clean to ensure p2 fully rescans the dropins directory and sees your plugins.
If it still doesn't load you can use p2 debugging to see what the problem is also. For some strange reason p2 doesn't log dropins issues unless you explicitly turn it on with the following steps:
Create an .options file in the eclipse folder where you start up Eclipse with the following content:
org.eclipse.equinox.p2.core/debug=true
org.eclipse.equinox.p2.core/reconciler=true
Then run eclipse with the following arguments (last argument is the path to the .options file you just created):
eclipse -clean -console -consoleLog -debug /path/to/.options
PS, I have created this bugzilla to request it be turned on as a default. You can vote/track making this logging the default there.
PPS, #kc2001's suggestion is a good one also once you have narrowed down on what plugin has the issue and you want to troubleshoot it more.
Some relevant links:
http://wiki.eclipse.org/Equinox_p2_Getting_Started
http://www.eclipse.org/forums/index.php/m/116635/
http://www-01.ibm.com/support/docview.wss?uid=swg21428463
I suggest that you try to install those features via the update manager. EMF and GEF are standard features from Eclipse.org, there's no reason not to install them in Eclipse's main p2 repository folder (it is easy to uninstall them, in case that is your concern).
Have a look at the error log view (Window -> Show View -> Error Log) to see why they didn't load. My guess is that they are missing a dependency, but without more information it is difficult to answer your question. I also suggest looking at Help -> About Eclipse -> Installation Details to see what exactly is installed.
Something that has just solved this very same issue for me: start eclipse with the command line parameters -clean -console -consoleLog. The weird thing: with -clean -console, it didn't work. Only after I added -consoleLog, the bundles were recognized.
This ended up being an issue with Eclipse for me. Placing the plugin jar in each of the folders suggested, running as admin, etc. didn't work.
What did solve it was downgrading from a Juno package to Indigo. You can find older versions of Eclipse here.
The local archive plug-ins work if you have downloaded an update site plug-in. In that case the dropins might not work.
About the dropin structure, it always worked for me, but I never use the eclipse folder inside my own ones, only the plugins and features. Did you extract the zip file to that structure?
If yes, it should be worth checking the Error log after Eclipse started, there might be some unresolved dependecies listed.
Don't place the zip files manually like that.
Use the wizard within Eclipse to install a local archive plug-in.