matthiasblaesing opened a new pull request, #7464:
URL: https://github.com/apache/netbeans/pull/7464
To parse JSF libraries in an (more or less) isolated environment, the JSF
library parsing is done with a special context class loader in place.
However as part of the preparation of the parsing process also maven
embedded is used to fetch the JSF reference implementation(s).
For a subset of users this exception was oberserved:
```
SEVERE [org.openide.util.Exceptions]
java.lang.ClassCastException: class
org.apache.commons.logging.impl.LogFactoryImpl cannot be cast to class
org.apache.commons.logging.LogFactory
(org.apache.commons.logging.impl.LogFactoryImpl is in unnamed module of loader
org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport$3
@473436a0; org.apache.commons.logging.LogFactory is in unnamed module of loader
org.netbeans.modules.netbinox.NetbinoxLoader @1f369488)
at
org.apache.commons.logging.LogFactory.newFactory(LogFactory.java:1445)
at org.apache.commons.logging.LogFactory.getFactory(LogFactory.java:818)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:987)
at
org.apache.http.conn.ssl.AbstractVerifier.<init>(AbstractVerifier.java:61)
at
org.apache.http.conn.ssl.AllowAllHostnameVerifier.<init>(AllowAllHostnameVerifier.java:44)
at
org.apache.http.conn.ssl.AllowAllHostnameVerifier.<clinit>(AllowAllHostnameVerifier.java:46)
Caused: java.lang.ExceptionInInitializerError
at
org.apache.http.conn.ssl.SSLConnectionSocketFactory.<clinit>(SSLConnectionSocketFactory.java:151)
at
org.eclipse.aether.transport.http.GlobalState.newConnectionManager(GlobalState.java:169)
at
org.eclipse.aether.transport.http.LocalState.<init>(LocalState.java:57)
at
org.eclipse.aether.transport.http.HttpTransporter.<init>(HttpTransporter.java:197)
at
org.eclipse.aether.transport.http.HttpTransporterFactory.newInstance(HttpTransporterFactory.java:95)
at
org.eclipse.aether.internal.impl.DefaultTransporterProvider.newTransporter(DefaultTransporterProvider.java:94)
at
org.eclipse.aether.connector.basic.BasicRepositoryConnector.<init>(BasicRepositoryConnector.java:128)
at
org.eclipse.aether.connector.basic.BasicRepositoryConnectorFactory.newInstance(BasicRepositoryConnectorFactory.java:172)
at
org.eclipse.aether.internal.impl.DefaultRepositoryConnectorProvider.newRepositoryConnector(DefaultRepositoryConnectorProvider.java:122)
at
org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:536)
at
org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:449)
at
org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:261)
at
org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:243)
at
org.eclipse.aether.internal.impl.DefaultRepositorySystem.resolveArtifact(DefaultRepositorySystem.java:278)
at
org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:197)
at
org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolveAlways(DefaultArtifactResolver.java:152)
at
org.netbeans.modules.maven.embedder.MavenEmbedder.resolveArtifact(MavenEmbedder.java:424)
at
org.netbeans.modules.maven.j2ee.MavenJsfReferenceImplementationProvider.artifactPathFor(MavenJsfReferenceImplementationProvider.java:81)
at
org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport.parseLibraries(FaceletsLibrarySupport.java:361)
at
org.netbeans.modules.web.jsf.editor.facelets.FaceletsLibrarySupport._findLibraries(FaceletsLibrarySupport.java:325)
```
The theory is, that running DefaultArtifactResolver#resolveAlways causes
loading of class LogFactoryImpl. As the context class loader is replaced that
context class loader is used for loading the class. That clashes with the
LogFactory, that is loaded via NetBinox.
It is expected, that removing the maven embedder call resolves the problem
or at least reduces the situation where this problem might occur.
Closes: #7449
Closes: #7436
Closes: #7354
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