Hi. I want to restore snapshot regardless of configuration about using coprocessor in source table. So, I disable loading coprocessor (described in https://www.cloudera.com/documentation/enterprise/5-13-x/topics/cm_mc_hbase_service.html#concept_fx5_2mv_hv) but still fail snapshot restoring. I think, checking 'hbase.coprocessor.enabled' configuration logic is omitted during restoring snapshot. I use hbase1.2.0-cdh5.13.0.   Confirm configuration.     but, error is occured when I try to restore snapshot 'users' table. (hostname masked)   Regionserver log 2017-12-15 16:18:50,280 ERROR org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler: Failed open of region=users,,1513317154960.047cb611299faac38d70705d3e01bd14., starting to roll back the global memstore size. java.lang.IllegalArgumentException: java.net.UnknownHostException: <hostname-masking> at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:406) 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.<init>(DFSClient.java:735) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:678) at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:158) at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2816) at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:98) at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2853) at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2835) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:387) at org.apache.hadoop.fs.Path.getFileSystem(Path.java:296) at org.apache.hadoop.hbase.util.CoprocessorClassLoader.init(CoprocessorClassLoader.java:176) at org.apache.hadoop.hbase.util.CoprocessorClassLoader.getClassLoader(CoprocessorClassLoader.java:263) at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.testTableCoprocessorAttrs(RegionCoprocessorHost.java:333) at org.apache.hadoop.hbase.regionserver.HRegion.checkClassLoading(HRegion.java:6628) at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:6572) at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:6534) at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:6505) at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:6461) at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:6412) at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:362) at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:129) at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:129) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: java.net.UnknownHostException: <hostname-masking> ... 27 more     ... View more