NullPointerException in HMemcacheScanner
----------------------------------------

                 Key: HADOOP-1888
                 URL: https://issues.apache.org/jira/browse/HADOOP-1888
             Project: Hadoop
          Issue Type: Bug
          Components: contrib/hbase
            Reporter: Nigel Daley


There are a number of instance of the NPE in
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/744/console

    [junit] java.lang.NullPointerException
    [junit]     at 
org.apache.hadoop.hbase.HMemcache$HMemcacheScanner.<init>(HMemcache.java:385)
    [junit]     at 
org.apache.hadoop.hbase.HMemcache.getScanner(HMemcache.java:350)
    [junit]     at 
org.apache.hadoop.hbase.HRegion$HScanner.<init>(HRegion.java:1542)
    [junit]     at org.apache.hadoop.hbase.HRegion.getScanner(HRegion.java:1058)
    [junit]     at 
org.apache.hadoop.hbase.HRegionServer.openScanner(HRegionServer.java:1173)
    [junit]     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    [junit]     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    [junit]     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    [junit]     at java.lang.reflect.Method.invoke(Method.java:585)
    [junit]     at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:340)
    [junit]     at org.apache.hadoop.ipc.Server$Handler.run(Server.java:566)

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