NSRE is normal, this happens when regions move around and your client needs to update the location.
That seems like an awful lot of mappers/reducers on a 5 server / dual core setup... You have only 2 cores per server but you have a DataNode, RegionServer, and 4 map tasks and 3 reduce tasks? That may be over extending things a bit. JG > -----Original Message----- > From: Oleg Ruchovets [mailto:[email protected]] > Sent: Monday, November 08, 2010 7:52 AM > To: [email protected] > Subject: Hbase insertion process cause to region server down. > > Hi , > > I run map/reduce job which from reducers writes to hbase. I have to > write > 8-9 million raws. > > My environment: > 5 servers dual core , 8G ram. > HDFS -- 9TB > > hadoop has 1000 heap_size , > hbase has 2000 heap_size > zookeeper has 1000 heap_size > 20 map / 16 reducers while running the job > > Allmost all the time get such exception > > org.apache.hadoop.hbase.NotServingRegionException: > org.apache.hadoop.hbase.NotServingRegionException: Region URLs_sanity, > 20101106_www.homemade-chinese-soups.com/conch-soup.html,1289163460337 > closed > at > org.apache.hadoop.hbase.regionserver.HRegion.obtainRowLock(HRegion.java > :1607) > at > org.apache.hadoop.hbase.regionserver.HRegion.getLock(HRegion.java:1671) > at > org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:2380) > at > org.apache.hadoop.hbase.regionserver.HRegionServer.get(HRegionServer.ja > va:1731) > at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccesso > rImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at > org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:657) > at > org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:91 > 5) > > > > Thanks in advance.
