hi, all I met this exception when I doing intensive insertions using YCSB. Anybody give me some clues on this? I use hbase 0.20.6.
com.yahoo.ycsb.DBException: org.apache.hadoop.hbase.client.RetriesExhaustedException: Trying to contact region server -- nothing found, no 'location' returned, tableName=usertable, reload=true -- for region , row 'user1001412274', but failed after 11 attempts. Exceptions: org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 at com.yahoo.ycsb.db.HBaseClient.cleanup(Unknown Source) at com.yahoo.ycsb.DBWrapper.cleanup(Unknown Source) at com.yahoo.ycsb.ClientThread.run(Unknown Source) Caused by: org.apache.hadoop.hbase.client.RetriesExhaustedException: Trying to contact region server -- nothing found, no 'location' returned, tableName=usertable, reload=true -- for region , row 'user1001412274', but failed after 11 attempts. Exceptions: org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 org.apache.hadoop.hbase.client.NoServerForRegionException: No server address listed in .META. for region usertable,,1291950247501 at org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRegionLocationForRowWithRetries(HConnectionManager.java:1095) at org.apache.hadoop.hbase.client.HConnectionManager$TableServers.access$200(HConnectionManager.java:240) at org.apache.hadoop.hbase.client.HConnectionManager$TableServers$Batch.getRegionName(HConnectionManager.java:1191) at org.apache.hadoop.hbase.client.HConnectionManager$TableServers$Batch.process(HConnectionManager.java:1168) at org.apache.hadoop.hbase.client.HConnectionManager$TableServers.processBatchOfRows(HConnectionManager.java:1238) at org.apache.hadoop.hbase.client.HTable.flushCommits(HTable.java:666) ... 3 more