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java.net.UnknownHostException: nameservice1	at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:378)	at org.apache.hadoop.hdfs.NameNodeProxies.createNonHAProxy(NameNodeProxies.java:310)	at org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:176)	at org.apache.hadoop.hdfs.DFSClient.(DFSClient.java:678)	at org.apache.hadoop.hdfs.DFSClient.(DFSClient.java:619)	at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:149)	at org.apache.hadoop.fs.PrestoFileSystemCache.createFileSystem(PrestoFileSystemCache.java:74)	at org.apache.hadoop.fs.PrestoFileSystemCache.getInternal(PrestoFileSystemCache.java:61)	at org.apache.hadoop.fs.PrestoFileSystemCache.get(PrestoFileSystemCache.java:43)	at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:371)	at org.apache.hadoop.fs.Path.getFileSystem(Path.java:295)	at parquet.hadoop.ParquetFileReader.readFooter(ParquetFileReader.java:384)	at com.facebook.presto.hive.parquet.ParquetHiveRecordCursor.createParquetRecordReader(ParquetHiveRecordCursor.java:364)	at com.facebook.presto.hive.parquet.ParquetHiveRecordCursor.(ParquetHiveRecordCursor.java:203)	at com.facebook.presto.hive.parquet.ParquetRecordCursorProvider.createHiveRecordCursor(ParquetRecordCursorProvider.java:102)	at com.facebook.presto.hive.HivePageSourceProvider.getHiveRecordCursor(HivePageSourceProvider.java:128)	at com.facebook.presto.hive.HivePageSourceProvider.createPageSource(HivePageSourceProvider.java:106)	at com.facebook.presto.spi.classloader.ClassLoaderSafeConnectorPageSourceProvider.createPageSource(ClassLoaderSafeConnectorPageSourceProvider.java:43)	at com.facebook.presto.transaction.LegacyConnectorPageSourceProvider.createPageSource(LegacyConnectorPageSourceProvider.java:40)	at com.facebook.presto.split.PageSourceManager.createPageSource(PageSourceManager.java:48)	at com.facebook.presto.operator.TableScanOperator.createSourceIfNecessary(TableScanOperator.java:268)	at com.facebook.presto.operator.TableScanOperator.isFinished(TableScanOperator.java:210)	at com.facebook.presto.operator.Driver.processInternal(Driver.java:377)	at com.facebook.presto.operator.Driver.processFor(Driver.java:303)	at com.facebook.presto.execution.SqlTaskExecution$DriverSplitRunner.processFor(SqlTaskExecution.java:580)	at com.facebook.presto.execution.TaskExecutor$PrioritizedSplitRunner.process(TaskExecutor.java:505)	at com.facebook.presto.execution.TaskExecutor$Runner.run(TaskExecutor.java:640)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)