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Comparison method violates its general contract!
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java.lang.IllegalArgumentException: Comparison method violates its general contract!	at java.util.TimSort.mergeLo(TimSort.java:777)	at java.util.TimSort.mergeAt(TimSort.java:514)	at java.util.TimSort.mergeCollapse(TimSort.java:441)	at java.util.TimSort.sort(TimSort.java:245)	at java.util.Arrays.sort(Arrays.java:1512)	at java.util.ArrayList.sort(ArrayList.java:1454)	at java.util.Collections.sort(Collections.java:175)	at jetbrains.buildServer.torrent.seeder.TorrentFilesDB.getSortedKeys(TorrentFilesDB.java:166)	at jetbrains.buildServer.torrent.seeder.TorrentFilesDB.flush(TorrentFilesDB.java:139)	at jetbrains.buildServer.torrent.seeder.TorrentsSeeder.flushTorrentsDB(TorrentsSeeder.java:127)	at jetbrains.buildServer.torrent.seeder.TorrentsSeeder.registerSrcAndTorrentFile(TorrentsSeeder.java:87)	at jetbrains.buildServer.torrent.ServerTorrentsDirectorySeeder.processArtifactInternal(ServerTorrentsDirectorySeeder.java:190)	at jetbrains.buildServer.torrent.ServerTorrentsDirectorySeeder.processArtifactInternal(ServerTorrentsDirectorySeeder.java:181)	at jetbrains.buildServer.torrent.ServerTorrentsDirectorySeeder$4.processBuildArtifact(ServerTorrentsDirectorySeeder.java:169)	at jetbrains.buildServer.serverSide.impl.artifacts.BuildArtifactsImpl.iterate(BuildArtifactsImpl.java:61)	at jetbrains.buildServer.serverSide.impl.artifacts.BuildArtifactsImpl.iterateArtifacts(BuildArtifactsImpl.java:52)	at jetbrains.buildServer.torrent.ServerTorrentsDirectorySeeder.announceBuildArtifacts(ServerTorrentsDirectorySeeder.java:166)	at jetbrains.buildServer.torrent.ServerTorrentsDirectorySeeder.access$300(ServerTorrentsDirectorySeeder.java:35)	at jetbrains.buildServer.torrent.ServerTorrentsDirectorySeeder$1.buildFinished(ServerTorrentsDirectorySeeder.java:73)	at sun.reflect.GeneratedMethodAccessor394.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at jetbrains.buildServer.util.EventDispatcher.dispatch(EventDispatcher.java:121)	at jetbrains.buildServer.serverSide.ServerSideEventDispatcher.superDispatch(ServerSideEventDispatcher.java:59)	at jetbrains.buildServer.serverSide.ServerSideEventDispatcher$1.run(ServerSideEventDispatcher.java:49)	at jetbrains.buildServer.serverSide.impl.auth.SecurityContextImpl.runAs(SecurityContextImpl.java:118)	at jetbrains.buildServer.serverSide.impl.auth.SecurityContextImpl.runAsSystem(SecurityContextImpl.java:102)	at jetbrains.buildServer.serverSide.ServerSideEventDispatcher.dispatch(ServerSideEventDispatcher.java:47)	at jetbrains.buildServer.util.EventDispatcher$2.invoke(EventDispatcher.java:68)	at com.sun.proxy.$Proxy20.buildFinished(Unknown Source)	at jetbrains.buildServer.serverSide.impl.RunningBuildsManagerImpl.finishBuild(RunningBuildsManagerImpl.java:168)	at jetbrains.buildServer.serverSide.impl.RunningBuildsManagerImpl.access$600(RunningBuildsManagerImpl.java:34)	at jetbrains.buildServer.serverSide.impl.RunningBuildsManagerImpl$5.run(RunningBuildsManagerImpl.java:508)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)