eclipse集成maven时，报错如下:
java.io.IOException: Server returned status code 404: Not Found
at org.maven.ide.eclipse.internal.index.AsyncFetcher$PipedError InputStream.checkError(AsyncFetcher.java:181)
at org.maven.ide.eclipse.internal.index.AsyncFetcher$PipedError InputStream.read(AsyncFetcher.java:188)
at java.io.PipedInputStream.read(PipedInputStream.java:361)
at java.io.InputStream.read(InputStream.java:85)
at java.util.Properties$LineReader.readLine(Properties.java:418 )
at java.util.Properties.load0(Properties.java:337)
at java.util.Properties.load(Properties.java:325)
at org.sonatype.nexus.index.updater.DefaultIndexUpdater.downloa dIndexProperties(DefaultIndexUpdater.java:498)
at org.sonatype.nexus.index.updater.DefaultIndexUpdater.access$ 100(DefaultIndexUpdater.java:74)
at org.sonatype.nexus.index.updater.DefaultIndexUpdater$IndexAd aptor.setProperties(DefaultIndexUpdater.java:780)
at org.sonatype.nexus.index.updater.DefaultIndexUpdater.fetchAn dUpdateIndex(DefaultIndexUpdater.java:954)
at org.sonatype.nexus.index.updater.DefaultIndexUpdater.fetchAn dUpdateIndex(DefaultIndexUpdater.java:138)
at org.maven.ide.eclipse.internal.index.NexusIndexManager.updat eRemoteIndex(NexusIndexManager.java:1072)
at org.maven.ide.eclipse.internal.index.NexusIndexManager.updat eIndex(NexusIndexManager.java:1025)
at org.maven.ide.eclipse.internal.index.NexusIndexManager$1.run (NexusIndexManager.java:632)
at org.maven.ide.eclipse.internal.index.IndexUpdaterJob.run(Ind exUpdaterJob.java:71)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: java.io.IOException: Server returned status code 404: Not Found
解决方法：
1、删除 $HOME/.m2/repository 文件
2、重启eclipse
