Deleted Spaces show not found

Hi,
I want to delete spaces which show now found but its display in gui

May i know the steps to delete Orphon Space

Does server.log have a more detailed error strack trace?

Not helpfull but here is the server log

2019-09-27 05:01:46,138 [scheduler-15] WARN c.d.s.r.MaterializationCache - couldn’t expand materialization a90c3b6d-714c-49f4-9ad1-1783016d9062
java.lang.IllegalStateException: Unable to retrieve selection for path.ca50053a-d508-41ad-9156-aaf338238444/a90c3b6d-714c-49f4-9ad1-1783016d9062_0
at com.dremio.service.reflection.materialization.AccelerationStoragePlugin.lambda$getDatasetHandle$0(AccelerationStoragePlugin.java:181) ~[dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.google.common.collect.Iterators$7.transform(Iterators.java:750) ~[guava-20.0.jar:na]
at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:47) ~[guava-20.0.jar:na]
at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:47) ~[guava-20.0.jar:na]
at com.google.common.collect.MultitransformedIterator.hasNext(MultitransformedIterator.java:52) ~[guava-20.0.jar:na]
at com.google.common.collect.MultitransformedIterator.hasNext(MultitransformedIterator.java:50) ~[guava-20.0.jar:na]
at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:249) ~[guava-20.0.jar:na]
at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:209) ~[guava-20.0.jar:na]
at com.google.common.collect.FluentIterable.toList(FluentIterable.java:614) ~[guava-20.0.jar:na]
at com.dremio.service.reflection.materialization.AccelerationStoragePlugin.getDatasetHandle(AccelerationStoragePlugin.java:185) ~[dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.catalog.ManagedStoragePlugin.getDatasetHandle(ManagedStoragePlugin.java:441) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.catalog.DatasetManager.getTableFromPlugin(DatasetManager.java:295) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.catalog.DatasetManager.getTable(DatasetManager.java:205) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.catalog.CatalogImpl.getTable(CatalogImpl.java:140) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.catalog.DelegatingCatalog.getTable(DelegatingCatalog.java:61) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.catalog.CachingCatalog.getTable(CachingCatalog.java:70) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.catalog.DremioCatalogReader.getTable(DremioCatalogReader.java:94) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.planner.acceleration.MaterializationExpander.expandSchemaPath(MaterializationExpander.java:202) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.planner.acceleration.MaterializationExpander.expand(MaterializationExpander.java:91) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.planner.acceleration.MaterializationDescriptor.getMaterializationFor(MaterializationDescriptor.java:147) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.ReflectionServiceImpl$CacheHelperImpl.expand(ReflectionServiceImpl.java:950) ~[dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.ReflectionServiceImpl$CacheHelperImpl.expand(ReflectionServiceImpl.java:931) ~[dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.MaterializationCache.updateEntry(MaterializationCache.java:174) [dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.MaterializationCache.safeUpdateEntry(MaterializationCache.java:166) [dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.MaterializationCache.updateCache(MaterializationCache.java:127) [dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.MaterializationCache.compareAndSetCache(MaterializationCache.java:99) [dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.MaterializationCache.refresh(MaterializationCache.java:92) [dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.ReflectionServiceImpl.refreshCache(ReflectionServiceImpl.java:397) [dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.ReflectionServiceImpl$CacheRefresher.run(ReflectionServiceImpl.java:1005) [dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.scheduler.LocalSchedulerService$CancellableTask.run(LocalSchedulerService.java:187) [dremio-services-scheduler-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_212]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_212]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_212]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_212]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_212]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_212]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_212]
2019-09-27 05:01:46,173 [scheduler-15] WARN c.d.s.r.MaterializationCache - couldn’t expand materialization 97d8e746-59d1-4072-84d0-ba621338bddb
java.lang.IllegalStateException: Unable to retrieve selection for path.e393eba7-3326-4768-bdf9-12bfc71b65ef/97d8e746-59d1-4072-84d0-ba621338bddb_0
at com.dremio.service.reflection.materialization.AccelerationStoragePlugin.lambda$getDatasetHandle$0(AccelerationStoragePlugin.java:181) ~[dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.google.common.collect.Iterators$7.transform(Iterators.java:750) ~[guava-20.0.jar:na]
at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:47) ~[guava-20.0.jar:na]
at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:47) ~[guava-20.0.jar:na]
at com.google.common.collect.MultitransformedIterator.hasNext(MultitransformedIterator.java:52) ~[guava-20.0.jar:na]
at com.google.common.collect.MultitransformedIterator.hasNext(MultitransformedIterator.java:50) ~[guava-20.0.jar:na]
at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:249) ~[guava-20.0.jar:na]
at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:209) ~[guava-20.0.jar:na]
at com.google.common.collect.FluentIterable.toList(FluentIterable.java:614) ~[guava-20.0.jar:na]
at com.dremio.service.reflection.materialization.AccelerationStoragePlugin.getDatasetHandle(AccelerationStoragePlugin.java:185) ~[dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.catalog.ManagedStoragePlugin.getDatasetHandle(ManagedStoragePlugin.java:441) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.catalog.DatasetManager.getTableFromPlugin(DatasetManager.java:295) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.catalog.DatasetManager.getTable(DatasetManager.java:205) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.catalog.CatalogImpl.getTable(CatalogImpl.java:140) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.catalog.DelegatingCatalog.getTable(DelegatingCatalog.java:61) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.catalog.CachingCatalog.getTable(CachingCatalog.java:70) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.catalog.DremioCatalogReader.getTable(DremioCatalogReader.java:94) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.planner.acceleration.MaterializationExpander.expandSchemaPath(MaterializationExpander.java:202) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.planner.acceleration.MaterializationExpander.expand(MaterializationExpander.java:91) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.exec.planner.acceleration.MaterializationDescriptor.getMaterializationFor(MaterializationDescriptor.java:147) ~[dremio-sabot-kernel-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.ReflectionServiceImpl$CacheHelperImpl.expand(ReflectionServiceImpl.java:950) ~[dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.ReflectionServiceImpl$CacheHelperImpl.expand(ReflectionServiceImpl.java:931) ~[dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.MaterializationCache.updateEntry(MaterializationCache.java:174) [dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.MaterializationCache.safeUpdateEntry(MaterializationCache.java:166) [dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.MaterializationCache.updateCache(MaterializationCache.java:127) [dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.MaterializationCache.compareAndSetCache(MaterializationCache.java:99) [dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.MaterializationCache.refresh(MaterializationCache.java:92) [dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.ReflectionServiceImpl.refreshCache(ReflectionServiceImpl.java:397) [dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.reflection.ReflectionServiceImpl$CacheRefresher.run(ReflectionServiceImpl.java:1005) [dremio-services-accelerator-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at com.dremio.service.scheduler.LocalSchedulerService$CancellableTask.run(LocalSchedulerService.java:187) [dremio-services-scheduler-3.2.0-201905102005330382-0598733.jar:3.2.0-201905102005330382-0598733]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_212]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_212]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_212]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_212]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_212]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_212]