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java.lang.OutOfMemoryError: Java heap space	at java.util.HashMap.resize(HashMap.java:462)	at java.util.HashMap.addEntry(HashMap.java:755)	at java.util.HashMap.put(HashMap.java:385)	at java.util.HashSet.add(HashSet.java:200)	at org.apache.maven.index.DefaultScannerListener.initialize(DefaultScannerListener.java:222)	at org.apache.maven.index.DefaultScannerListener.scanningStarted(DefaultScannerListener.java:82)	at org.apache.maven.index.DefaultScanner.scan(DefaultScanner.java:49)	at org.apache.maven.index.DefaultNexusIndexer.scan(DefaultNexusIndexer.java:290)	at org.sonatype.nexus.index.DefaultIndexerManager.reindexRepository(DefaultIndexerManager.java:903)	at org.sonatype.nexus.index.DefaultIndexerManager.reindexAllRepositories(DefaultIndexerManager.java:810)	at org.sonatype.nexus.tasks.ReindexTaskHandlerLegacy.reindexAllRepositories(ReindexTaskHandlerLegacy.java:47)	at org.sonatype.nexus.tasks.AbstractIndexerTask.doRun(AbstractIndexerTask.java:80)	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:637)