I get repeatedly on my codebase the following error. It happens about every 5 minutes.

Java Model Exception: Java Model Status [ does not exist]
at org.eclipse.jdt.internal.core.JavaElement.newJavaModelException(JavaElement.java:505)
at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:246)
at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:518)
at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:255)
at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:241)
at org.eclipse.jdt.internal.core.JavaProject.getJavaProjectElementInfo(JavaProject.java:1638)
at org.eclipse.jdt.internal.core.JavaProject.newNameLookup(JavaProject.java:2325)
at org.eclipse.jdt.internal.core.JavaProject.newNameLookup(JavaProject.java:2335)
at org.eclipse.jdt.internal.core.JavaProject.findType(JavaProject.java:1354)
at org.eclipse.jdt.internal.core.JavaProject.findType(JavaProject.java:1261)
at scala.tools.eclipse.javaelements.ScalaJavaMapper$$anonfun$2.apply(ScalaJavaMapper.scala:48)
at scala.tools.eclipse.javaelements.ScalaJavaMapper$$anonfun$2.apply(ScalaJavaMapper.scala:48)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
at scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:34)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:244)
at scala.collection.AbstractTraversable.map(Traversable.scala:105)
at scala.tools.eclipse.javaelements.ScalaJavaMapper$class.getJavaElement(ScalaJavaMapper.scala:48)
at scala.tools.eclipse.ScalaPresentationCompiler.getJavaElement(ScalaPresentationCompiler.scala:35)
at scala.tools.eclipse.javaelements.ScalaJavaMapper$class.getJavaElement(ScalaJavaMapper.scala:73)
at scala.tools.eclipse.ScalaPresentationCompiler.getJavaElement(ScalaPresentationCompiler.scala:35)
at scala.tools.eclipse.javaelements.ScalaJavaMapper$class.getJavaElement(ScalaJavaMapper.scala:50)
at scala.tools.eclipse.ScalaPresentationCompiler.getJavaElement(ScalaPresentationCompiler.scala:35)
at scala.tools.eclipse.ScalaPresentationCompiler.mkCompletionProposal(ScalaPresentationCompiler.scala:292)
at scala.tools.eclipse.completion.ScalaCompletions$$anonfun$findCompletions$1$$anonfun$apply$1$$anonfun$apply$mcV$sp$1.apply(ScalaCompletions.scala:71)
at scala.tools.eclipse.completion.ScalaCompletions$$anonfun$findCompletions$1$$anonfun$apply$1$$anonfun$apply$mcV$sp$1.apply(ScalaCompletions.scala:64)
at scala.collection.immutable.List.foreach(List.scala:309)
at scala.tools.eclipse.completion.ScalaCompletions$$anonfun$findCompletions$1$$anonfun$apply$1.apply$mcV$sp(ScalaCompletions.scala:64)
at scala.tools.eclipse.completion.ScalaCompletions$$anonfun$findCompletions$1$$anonfun$apply$1.apply(ScalaCompletions.scala:63)
at scala.tools.eclipse.completion.ScalaCompletions$$anonfun$findCompletions$1$$anonfun$apply$1.apply(ScalaCompletions.scala:63)
at scala.tools.nsc.util.InterruptReq.execute(InterruptReq.scala:26)
at scala.tools.nsc.interactive.Global.pollForWork(Global.scala:337)
at scala.tools.nsc.interactive.PresentationCompilerThread.run(PresentationCompilerThread.scala:22)