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This bug was originally marked as duplicate of bug 245701, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 8.0.1 (Build 201408251540) VM: Java HotSpot(TM) 64-Bit Server VM, 25.5-b02, Java(TM) SE Runtime Environment, 1.8.0_05-b13 OS: Linux User Comments: tmky2k: After I update the maven utilities plugin then I encounter this problem GUEST: AbstractMethodError at org.netbeans.modules.maven.NbMavenProjectImpl$OtherRootsVisitor.preVisitDirectory GUEST: ? GUEST: Openning maven project kalwi: After todays (16.7.2014) updates of dev. build, this exception occurs very often while just usual working with Maven projects (opening files, browsing the projects tree). I also don't see Other Resources, Other Test Resources, pom.xml etc. in the projects tree. I think that those two issues are related each to other. Unfortunatelly, the dev. build available for download is 201407090001, which is the same which I have (+ updates). So there is no way for me to prove that fresh installation of the actual build would solve this issue (in case of incompatibility between modules from 201407090001 and updated modules). I can only uninstall it and install again. I noticed that one of updated modules was "Maven Utils". The problem seems to be solved for me by todays updates. Stacktrace: java.lang.AbstractMethodError at org.netbeans.modules.maven.NbMavenProjectImpl$OtherRootsVisitor.preVisitDirectory(NbMavenProjectImpl.java:733) at org.netbeans.modules.maven.NbMavenProjectImpl$OtherRootsVisitor.preVisitDirectory(NbMavenProjectImpl.java:713) at java.nio.file.Files.walkFileTree(Files.java:2674) at java.nio.file.Files.walkFileTree(Files.java:2739) at org.netbeans.modules.maven.NbMavenProjectImpl.getOtherRoots(NbMavenProjectImpl.java:695) at org.netbeans.modules.maven.nodes.OtherRootNodeFactory$NList.keys(OtherRootNodeFactory.java:108)
Created attachment 149232 [details] stacktrace
Created attachment 149648 [details] stacktrace netbeans startup
*** This bug has been marked as a duplicate of bug 247437 ***