I have Eclipse 2020-03 with Maven and Drools (via install new software). My first project follows
RedHat 7.5 Using Java to run DRLs
and I am getting builder error:
Errors occurred during the build.
Errors running builder 'Drools Builder' on project 'Drools_1'.
org/apache/commons/math3/util/ArithmeticUtils
I have d/l the math3 JAR, added it to my build path.
Any ideas about the Drools Builder? It's one of the builders in the project > Properties > Builders
Related
How does Eclipse propagate Java 11 "Expose Package..." to the Maven target?
I am exposing a Java 11 module to ALL-UNNAMED using Eclipse: Properties -> Java Build Path -> Module Dependencies -> Expose Package...
Nothing is added to pom.xml with this configuration yet the project builds successfully.
Using Eclipse 2020-06, m2e's maven 3.6.3, maven-compiler-plugin 3.8.1 (this is the only explicit override in pom.xml). The rest is the "EMBEDDED" maven.
When I look at the Maven console and effective pom I do not see any compilerArgs (--add-exports...) added. When I run mvn from the command line I do get compiler failure as expected.
How does m2e propagate --add-exports to javac without it being visible to help:effective-pom target or Maven console?
In Eclipse when I click "Show JPMS Options..." it does display "--add-exports ...", but nowhere in the m2e debug output does this appear.
When I run the sample Drools project in Eclipse, it throws an Exception "The Eclipse JDT Core jar is not in the classpath". I have created the Drools 6 runtime manually. Am I missing something?
Full stacktrace
org.drools.core.RuntimeDroolsException: Unable to load dialect 'org.drools.compiler.rule.builder.dialect.java.JavaDialectConfiguration:java:org.drools.compiler.rule.builder.dialect.java.JavaDialectConfiguration'
at org.drools.compiler.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:360)
at org.drools.compiler.compiler.PackageBuilderConfiguration.buildDialectConfigurationMap(PackageBuilderConfiguration.java:346)
at org.drools.compiler.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:228)
at org.drools.compiler.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:196)
at org.drools.compiler.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:152)
at org.drools.compiler.kie.builder.impl.AbstractKieModule.buildKnowledgePackages(AbstractKieModule.java:166)
at org.drools.compiler.kie.builder.impl.KieContainerImpl.createKieBase(KieContainerImpl.java:244)
at org.drools.compiler.kie.builder.impl.KieContainerImpl.getKieBase(KieContainerImpl.java:204)
at org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieSession(KieContainerImpl.java:347)
at org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieSession(KieContainerImpl.java:322)
at com.sample.ProcessTest.main(ProcessTest.java:17)
Caused by: java.lang.RuntimeException: The Eclipse JDT Core jar is not in the classpath
at org.drools.compiler.rule.builder.dialect.java.JavaDialectConfiguration.setCompiler(JavaDialectConfiguration.java:100)
at org.drools.compiler.rule.builder.dialect.java.JavaDialectConfiguration.init(JavaDialectConfiguration.java:61)
at org.drools.compiler.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:356)
... 10 more
You are missing the Ecliose jdt core jar. Add yhat jar and it should work.
Added the org.eclipse.jdt.core-3.7.1.jar file to the buildpath of the project and it works perfectly fine. Not sure why this was not part of the Drools runtime which i created manually.
i am using eclipse Luna. I have installed e4 tools
When i tried to create e4 project as File -> New -> Other… -> Eclipse 4 Application Project. Following error occurs:
Errors occurred during the build.
Errors running builder 'Plug-in Manifest Builder' on project 'testing'.
java.lang.NullPointerException What is the reason?
I add sbt eclipse plug-in .First I created the project named hello the in project directory i created a file named plugins.sbt and add this line in it
addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "2.5.0")
and after the sbt> I typed eclipse then it created the project for eclipse
when I open eclipse it gives me error message
An error has occurred. See the error log for more details
The org.eclipse.jdt.ui.javaElementFilters plug-in extension "scala.tools.eclipse.javaelements.ScalaElementFilter" specifies a viewer filter class which does not exist.
Plug-in org.scala-ide.sdt.core was unable to load class scala.tools.eclipse.javaelements.ScalaElementFilter.
An error occurred while automatically activating bundle org.scala-ide.sdt.core (806).
please help me to how to resolve this error and when I imported the sbt project eclipse give me another error
Building workspace has encountered a problem
Errors occurred during the build.
Error instantiating builder 'org.scala-ide.sdt.core.scalabuilder'.
Plug-in org.scala-ide.sdt.core was unable to load class scala.tools.eclipse.ScalaBuilder.
An error occurred while automatically activating bundle org.scala-ide.sdt.core (806).
Plug-in org.scala-ide.sdt.core was unable to load class scala.tools.eclipse.ScalaBuilder.
An error occurred while automatically activating bundle org.scala-ide.sdt.core (806).
Please help me
scala version 2.11.1
sbt version 0.13
I added the scala-IDE plugin from this source
http://scala-ide.org/download/current.html
i am using eclipse juno and pasted the following location in install new software
http://download.scala-ide.org/sdk/helium/e38/scala211/stable/site
my project compiles successfully in sbt
Are you using Eclipse Luna for Java Developers (as opposed to Eclipse Classic) AND Scala IDE 4.0 milestone 3? There is a known issue (solved in the nightly builds since then), reported on the mailing list here.
You can "fix" it by either upgrading the Scala plugin to a nightly build (they're pretty stable), or going with Eclipse Classic instead.
I'm trying to generate the metamodel definitions in Eclipse as documented on:
http://www.datanucleus.org/products/accessplatform/jpa/jpql_criteria.html
My project compiler level is set to 1.6 and the mentioned datanucleus jars are added to the factory path.
When the project builds I get the following error:
Errors occurred during the build.
Errors running builder 'Java Builder' on project 'X'.
Could not initialize class org.datanucleus.jpa.query.JPACriteriaProcessor
When using mvn compile the metamodel definitions are generated successfully, so it's probably related to Eclipse annnotation processing.
I'm using latest Spring Tool Suite 3.1.0.RELEASE based on Eclipse 4.2.1
Not put persistence-api.jar (or equivalent, such as Geronimo specs JPA2) in the Factory Path? Either way one of the deps is missing