mbien opened a new pull request, #8993:
URL: https://github.com/apache/netbeans/pull/8993
provider can return an empty collection, e.g when network problems are
encountered. This collection is typically immutable.
use defensive copy before adding to it, which is cleaner anyway.
exception:
<details>
org.apache.http.client.HttpResponseException: status code: 500, reason
phrase: Internal Server Error (500)
at
org.eclipse.aether.transport.http.HttpTransporter.handleStatus(HttpTransporter.java:639)
at
org.eclipse.aether.transport.http.HttpTransporter.execute(HttpTransporter.java:509)
at
org.eclipse.aether.transport.http.HttpTransporter.implGet(HttpTransporter.java:456)
at
org.eclipse.aether.spi.connector.transport.AbstractTransporter.get(AbstractTransporter.java:64)
at
org.eclipse.aether.connector.basic.BasicRepositoryConnector$GetTaskRunner.runTask(BasicRepositoryConnector.java:482)
at
org.eclipse.aether.connector.basic.BasicRepositoryConnector$TaskRunner.run(BasicRepositoryConnector.java:414)
Caused: org.eclipse.aether.transfer.ArtifactTransferException: Could not
transfer artifact
org.apache.maven.plugins:maven-clean-plugin:json:cyclonedx:4.0.0-beta-2 from/to
central (https://repo.maven.apache.org/maven2/): status code: 500, reason
phrase: Internal Server Error (500)
at
org.eclipse.aether.connector.basic.ArtifactTransportListener.transferFailed(ArtifactTransportListener.java:44)
at
org.eclipse.aether.connector.basic.BasicRepositoryConnector$TaskRunner.run(BasicRepositoryConnector.java:417)
at
org.eclipse.aether.connector.basic.BasicRepositoryConnector.get(BasicRepositoryConnector.java:260)
at
org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:537)
at
org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:449)
Caused: org.eclipse.aether.resolution.ArtifactResolutionException: The
following artifacts could not be resolved:
org.apache.maven.plugins:maven-clean-plugin:json:cyclonedx:4.0.0-beta-2
(absent): Could not transfer artifact
org.apache.maven.plugins:maven-clean-plugin:json:cyclonedx:4.0.0-beta-2 from/to
central (https://repo.maven.apache.org/maven2/): status code: 500, reason
phrase: Internal Server Error (500)
at
org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:473)
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)
Caused: org.apache.maven.artifact.resolver.ArtifactResolutionException: The
following artifacts could not be resolved:
org.apache.maven.plugins:maven-clean-plugin:json:cyclonedx:4.0.0-beta-2
(absent): Could not transfer artifact
org.apache.maven.plugins:maven-clean-plugin:json:cyclonedx:4.0.0-beta-2 from/to
central (https://repo.maven.apache.org/maven2/): status code: 500, reason
phrase: Internal Server Error (500)
org.apache.maven.plugins:maven-clean-plugin:json:4.0.0-beta-2
from the specified remote repositories:
central (https://repo.maven.apache.org/maven2/, releases=true,
snapshots=true)
at
org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:202)
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.indexer.api.RepositoryUtil.downloadArtifact(RepositoryUtil.java:98)
at
org.netbeans.modules.maven.indexer.api.PluginIndexManager.getPluginGoalNames(PluginIndexManager.java:74)
[catch] at
org.netbeans.modules.maven.grammar.GoalsProviderImpl.getAvailableGoals(GoalsProviderImpl.java:41)
at
org.netbeans.modules.maven.execute.ui.RunGoalsPanel.lambda$new$1(RunGoalsPanel.java:71)
at
org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1403)
at
org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
at org.openide.util.lookup.Lookups.executeWith(Lookups.java:287)
at
org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2018)
java.lang.UnsupportedOperationException
at
java.base/java.util.AbstractCollection.add(AbstractCollection.java:253)
at
java.base/java.util.AbstractCollection.addAll(AbstractCollection.java:338)
at
org.netbeans.modules.maven.execute.ui.RunGoalsPanel.lambda$new$1(RunGoalsPanel.java:74)
at
org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1403)
at
org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
at org.openide.util.lookup.Lookups.executeWith(Lookups.java:287)
at
org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2018)
</details>
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