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org.apache.lucene.index.CorruptIndexException: Unknown format version: -7 at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:211) at org.apache.lucene.index.DirectoryIndexReader$1.doBody(DirectoryIndexReader.java:68) at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:636) at org.apache.lucene.index.DirectoryIndexReader.open(DirectoryIndexReader.java:63) at org.apache.lucene.index.IndexReader.open(IndexReader.java:209) at org.apache.lucene.index.IndexReader.open(IndexReader.java:192) at org.sonatype.nexus.index.updater.DefaultIndexUpdater.copyUpdatedDocuments(DefaultIndexUpdater.java:388) at org.sonatype.nexus.index.updater.DefaultIndexUpdater.unpackIndexArchive(DefaultIndexUpdater.java:325) at org.sonatype.nexus.index.updater.DefaultIndexUpdater.loadIndexDirectory(DefaultIndexUpdater.java:251) at org.sonatype.nexus.index.updater.DefaultIndexUpdater.fetchAndUpdateIndex(DefaultIndexUpdater.java:157) at org.sonatype.nexus.index.DefaultIndexerManager.updateRemoteIndex(DefaultIndexerManager.java:1234) at org.sonatype.nexus.index.DefaultIndexerManager.downloadRepositoryIndex(DefaultIndexerManager.java:1115) at org.sonatype.nexus.index.DefaultIndexerManager.downloadAllIndex(DefaultIndexerManager.java:1036) at org.sonatype.nexus.tasks.DownloadIndexesTask.doRun(DownloadIndexesTask.java:54) at org.sonatype.nexus.scheduling.AbstractNexusTask.call(AbstractNexusTask.java:192) at org.sonatype.scheduling.DefaultScheduledTask.call(DefaultScheduledTask.java:338) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:207) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619)