java.io.IOException: Cannot fetch remote index for repository "couch" [id=couch], error occurred.

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Nexus UI allows invalid URL's in proxy repository configuration

Cannot fetch remote index for repository "couch" [id=couch], error occurred.

java.net.URISyntaxException: Illegal character in path at index 33: http://files.couchbase.com/maven2 /.index/nexus-maven-repository-index.properties	at java.net.URI$Parser.fail(URI.java:2829)	at java.net.URI$Parser.checkChars(URI.java:3002)	at java.net.URI$Parser.parseHierarchical(URI.java:3086)	at java.net.URI$Parser.parse(URI.java:3034)	at java.net.URI.(URI.java:595)	at java.net.URI.create(URI.java:857)	at org.apache.http.client.methods.HttpGet.(HttpGet.java:69)	at org.sonatype.nexus.proxy.storage.remote.httpclient.HttpClientRemoteStorage.retrieveItem(HttpClientRemoteStorage.java:190)	at org.sonatype.nexus.index.DefaultIndexerManager$11.retrieve(DefaultIndexerManager.java:1252)	at org.apache.maven.index.updater.DefaultIndexUpdater.downloadIndexProperties(DefaultIndexUpdater.java:465)	at org.apache.maven.index.updater.DefaultIndexUpdater.access$000(DefaultIndexUpdater.java:76)	at org.apache.maven.index.updater.DefaultIndexUpdater$IndexAdaptor.setProperties(DefaultIndexUpdater.java:595)	at org.apache.maven.index.updater.DefaultIndexUpdater.fetchAndUpdateIndex(DefaultIndexUpdater.java:822)	at org.apache.maven.index.updater.DefaultIndexUpdater.fetchAndUpdateIndex(DefaultIndexUpdater.java:159)	at org.sonatype.nexus.index.DefaultIndexerManager.updateRemoteIndex(DefaultIndexerManager.java:1289)	at org.sonatype.nexus.index.DefaultIndexerManager.access$1100(DefaultIndexerManager.java:189)	at org.sonatype.nexus.index.DefaultIndexerManager$IndexUpdateRunnable.run(DefaultIndexerManager.java:1058)	at org.sonatype.nexus.index.DefaultIndexerManager.sharedSingle(DefaultIndexerManager.java:2310)	at org.sonatype.nexus.index.DefaultIndexerManager.reindexRepository(DefaultIndexerManager.java:999)	at org.sonatype.nexus.index.DefaultIndexerManager.reindexRepository(DefaultIndexerManager.java:962)	at org.sonatype.nexus.index.DefaultIndexerManager.reindexRepository(DefaultIndexerManager.java:939)	at org.sonatype.nexus.tasks.ReindexTaskHandlerLegacy.reindexRepository(ReindexTaskHandlerLegacy.java:62)	at org.sonatype.nexus.tasks.AbstractIndexerTask.doRun(AbstractIndexerTask.java:69)	at org.sonatype.nexus.scheduling.AbstractNexusTask.call(AbstractNexusTask.java:157)	at org.sonatype.scheduling.DefaultScheduledTask.call(DefaultScheduledTask.java:419)	at org.sonatype.nexus.threads.MDCAwareCallable.call(MDCAwareCallable.java:45)	at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)	at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)	at java.util.concurrent.FutureTask.run(FutureTask.java:262)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at java.lang.Thread.run(Thread.java:745)