Hi Andrea, Which version of HBase are you testing with?
JM 2013/12/10 Andrea <[email protected]> > Hi, I encounter this problem: > > 13/12/10 13:25:15 WARN client.HConnectionManager$HConnectionImplementation: > Encountered problems when prefetch META table: > java.io.IOException: HRegionInfo was null or empty in Meta for usertable, > row=usertable,user4300292263938371081,99999999999999 > at > org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:170) > at > org.apache.hadoop.hbase.client.MetaScanner.access$000(MetaScanner.java:54) > at > org.apache.hadoop.hbase.client.MetaScanner$1.connect(MetaScanner.java:133) > at > org.apache.hadoop.hbase.client.MetaScanner$1.connect(MetaScanner.java:130) > at > > org.apache.hadoop.hbase.client.HConnectionManager.execute(HConnectionManager > .java:360) > at > org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:130) > at > org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:105) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation. > prefetchRegionCache(HConnectionManager.java:918) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation. > locateRegionInMeta(HConnectionManager.java:973) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation. > locateRegion(HConnectionManager.java:860) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation. > locateRegion(HConnectionManager.java:817) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation. > processBatchCallback(HConnectionManager.java:1507) > at > > org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation. > processBatch(HConnectionManager.java:1392) > at > org.apache.hadoop.hbase.client.HTable.flushCommits(HTable.java:918) > at org.apache.hadoop.hbase.client.HTable.doPut(HTable.java:774) > at org.apache.hadoop.hbase.client.HTable.put(HTable.java:749) > at com.yahoo.ycsb.db.HBaseClient.update(HBaseClient.java:328) > at com.yahoo.ycsb.db.HBaseClient.insert(HBaseClient.java:357) > at com.yahoo.ycsb.DBWrapper.insert(DBWrapper.java:148) > at > com.yahoo.ycsb.workloads.CoreWorkload.doInsert(CoreWorkload.java:461) > at com.yahoo.ycsb.ClientThread.run(Client.java:269) > > It will happen when, on a netowrk with one zookeeper, one master and one > regionserver I try to load a lot of data. This is the number of operations > before the error: > > 200 sec: 888708 operations; 7767.62 current ops/sec; [UPDATE > AverageLatency(us)=27089963] [INSERT AverageLatency(us)=9738.99] [CLEANUP > AverageLatency(us)=27089976] > 210 sec: 893742 operations; 502.7 current ops/sec; [UPDATE > AverageLatency(us)=14887298.5] [INSERT AverageLatency(us)=6937.27] [CLEANUP > AverageLatency(us)=14887312.5] > 221 sec: 928277 operations; 3226.97 current ops/sec; [UPDATE > AverageLatency(us)=27006074] [INSERT AverageLatency(us)=8529.21] [CLEANUP > AverageLatency(us)=27006089] > 231 sec: 930079 operations; 180.18 current ops/sec; [INSERT > AverageLatency(us)=457.08] > 13/12/10 13:25:13 WARN client.HConnectionManager$HConnectionImplementation: > Encountered problems when prefetch META table: ... > > Does this depend on the number of thread in whereby I insert the data? > >
