Forgot to mention the versions: I'm running HBase 0.90.4 with Hadoop 0.20.205.0.
On Dec 13, 2011, at 8:52 AM, Yves Langisch wrote: > Hi, > > from time to time I get a NPE on my regionserver. Apparently it's occurring > while obtaining a row lock: > > --- > 2011-12-13 02:00:19,582 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: > Block cache LRU eviction completed; freed=39.59 MB, total=296.26 MB, > single=164.82 MB, multi=167.62 MB, memory=42.16 KB > 2011-12-13 02:00:20,365 ERROR > org.apache.hadoop.hbase.regionserver.HRegionServer: Error obtaining row lock > (fsOk: true) > java.lang.NullPointerException > at > java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:881) > at > org.apache.hadoop.hbase.regionserver.HRegionServer.addRowLock(HRegionServer.java:2010) > at > org.apache.hadoop.hbase.regionserver.HRegionServer.lockRow(HRegionServer.java:1996) > at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:570) > at > org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1039) > 2011-12-13 02:00:20,529 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: > Block cache LRU eviction started; Attempting to free 39.56 MB of total=335.72 > MB > 2011-12-13 02:00:20,532 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: > Block cache LRU eviction completed; freed=39.59 MB, total=296.2 MB, > single=177.89 MB, multi=154.62 MB, memory=42.16 KB > 2011-12-13 02:00:21,433 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: > Block cache LRU eviction started; Attempting to free 39.49 MB of total=335.66 > MB > 2011-12-13 02:00:21,435 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: > Block cache LRU eviction completed; freed=39.52 MB, total=296.14 MB, > single=172.92 MB, multi=159.46 MB, memory=42.16 KB > --- > > Any ideas? > > Regards > Yves
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