mikewalch opened a new issue #1021: Tablet server failed to load Root tablet during 2.0 upgrade URL: https://github.com/apache/accumulo/issues/1021 Found this while trying to upgrade from `1.9.3-SNAPSHOT` to `2.0.0-SNAPSHOT` ``` 2019-03-08 15:25:19,166 [tserver.TabletServer] INFO : Root tablet loaded: +r<< 2019-03-08 15:25:19,342 [tserver.FileManager] ERROR: Failed to open file hdfs://localhost:8020/accumulo/tables/+r/root_tablet/A000001b.rf null 2019-03-08 15:25:19,347 [scan.LookupTask] WARN : lookup failed for tablet +r<< java.io.IOException: Failed to open hdfs://localhost:8020/accumulo/tables/+r/root_tablet/A000001b.rf at org.apache.accumulo.tserver.FileManager.reserveReaders(FileManager.java:361) at org.apache.accumulo.tserver.FileManager.access$600(FileManager.java:63) at org.apache.accumulo.tserver.FileManager$ScanFileManager.openFiles(FileManager.java:526) at org.apache.accumulo.tserver.FileManager$ScanFileManager.openFileRefs(FileManager.java:511) at org.apache.accumulo.tserver.FileManager$ScanFileManager.openFiles(FileManager.java:536) at org.apache.accumulo.tserver.tablet.ScanDataSource.createIterator(ScanDataSource.java:182) at org.apache.accumulo.tserver.tablet.ScanDataSource.iterator(ScanDataSource.java:140) at org.apache.accumulo.core.iterators.system.SourceSwitchingIterator.seek(SourceSwitchingIterator.java:226) at org.apache.accumulo.tserver.tablet.Tablet.lookup(Tablet.java:603) at org.apache.accumulo.tserver.tablet.Tablet.lookup(Tablet.java:757) at org.apache.accumulo.tserver.scan.LookupTask.run(LookupTask.java:116) at org.apache.accumulo.tserver.session.ScanSession$ScanMeasurer.run(ScanSession.java:54) at org.apache.accumulo.tserver.TabletServerResourceManager.executeReadAhead(TabletServerResourceManager.java:936) at org.apache.accumulo.tserver.TabletServer$ThriftClientHandler.continueMultiScan(TabletServer.java:842) at org.apache.accumulo.tserver.TabletServer$ThriftClientHandler.startMultiScan(TabletServer.java:812) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.accumulo.core.trace.TraceUtil.lambda$wrapService$8(TraceUtil.java:235) at com.sun.proxy.$Proxy21.startMultiScan(Unknown Source) at org.apache.accumulo.core.tabletserver.thrift.TabletClientService$Processor$startMultiScan.getResult(TabletClientService.java:2757) at org.apache.accumulo.core.tabletserver.thrift.TabletClientService$Processor$startMultiScan.getResult(TabletClientService.java:2736) at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:38) at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39) at org.apache.accumulo.server.rpc.TimedProcessor.process(TimedProcessor.java:65) at org.apache.thrift.server.AbstractNonblockingServer$FrameBuffer.invoke(AbstractNonblockingServer.java:518) at org.apache.accumulo.server.rpc.CustomNonBlockingServer$CustomFrameBuffer.invoke(CustomNonBlockingServer.java:112) at org.apache.thrift.server.Invocation.run(Invocation.java:18) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.accumulo.fate.util.LoggingRunnable.run(LoggingRunnable.java:35) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.NullPointerException at java.util.Objects.requireNonNull(Objects.java:203) at org.apache.accumulo.core.crypto.CryptoUtils.writeParams(CryptoUtils.java:65) at org.apache.accumulo.core.file.rfile.bcfile.BCFile$Reader.serializeMetadata(BCFile.java:585) at org.apache.accumulo.core.file.blockfile.impl.CachableBlockFile$Reader$BCFileLoader.load(CachableBlockFile.java:229) at org.apache.accumulo.core.file.blockfile.cache.lru.SynchronousLoadingBlockCache.getBlock(SynchronousLoadingBlockCache.java:127) at org.apache.accumulo.core.file.blockfile.cache.lru.SynchronousLoadingBlockCache.resolveDependencies(SynchronousLoadingBlockCache.java:64) at org.apache.accumulo.core.file.blockfile.cache.lru.SynchronousLoadingBlockCache.getBlock(SynchronousLoadingBlockCache.java:109) at org.apache.accumulo.core.file.blockfile.impl.CachableBlockFile$Reader.getMetaBlock(CachableBlockFile.java:385) at org.apache.accumulo.core.file.rfile.RFile$Reader.<init>(RFile.java:1156) at org.apache.accumulo.core.file.rfile.RFile$Reader.<init>(RFile.java:1251) at org.apache.accumulo.core.file.rfile.RFileOperations.getReader(RFileOperations.java:53) at org.apache.accumulo.core.file.rfile.RFileOperations.openReader(RFileOperations.java:68) ```
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