Elliott Clark created HBASE-9140:
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             Summary: NPE in AsyncProcess
                 Key: HBASE-9140
                 URL: https://issues.apache.org/jira/browse/HBASE-9140
             Project: HBase
          Issue Type: Bug
          Components: Client
    Affects Versions: 0.95.2
         Environment: 0.95.2 + Hadoop 2.0.4
            Reporter: Elliott Clark


Running YCSB progress got stuck for quite a while and then a Null Pointer 
Exception was thrown:
{noformat}
 230 sec: 1266253 operations; 0 current ops/sec;  
 240 sec: 1266253 operations; 0 current ops/sec;  
 250 sec: 1266253 operations; 0 current ops/sec;  
 260 sec: 1266253 operations; 0 current ops/sec;  
 270 sec: 1266253 operations; 0 current ops/sec;  
 280 sec: 1266253 operations; 0 current ops/sec;  
 290 sec: 1266253 operations; 0 current ops/sec;  
 300 sec: 1266253 operations; 0 current ops/sec;  
 310 sec: 1266253 operations; 0 current ops/sec;  
 320 sec: 1266253 operations; 0 current ops/sec;  
 330 sec: 1266253 operations; 0 current ops/sec;  
 340 sec: 1266253 operations; 0 current ops/sec;  
 350 sec: 1266253 operations; 0 current ops/sec;  
 360 sec: 1266253 operations; 0 current ops/sec;  
 370 sec: 1266253 operations; 0 current ops/sec;  
 380 sec: 1266253 operations; 0 current ops/sec;  
 390 sec: 1266253 operations; 0 current ops/sec;  
Exception in thread "Thread-26" java.lang.NullPointerException
        at 
org.apache.hadoop.hbase.client.AsyncProcess.findDestLocation(AsyncProcess.java:288)
        at 
org.apache.hadoop.hbase.client.AsyncProcess.submit(AsyncProcess.java:233)
        at 
org.apache.hadoop.hbase.client.HTable.backgroundFlushCommits(HTable.java:811)
        at org.apache.hadoop.hbase.client.HTable.flushCommits(HTable.java:1192)
        at com.yahoo.ycsb.db.HBaseClient.cleanup(HBaseClient.java:106)
        at com.yahoo.ycsb.DBWrapper.cleanup(DBWrapper.java:73)
        at com.yahoo.ycsb.ClientThread.run(Client.java:307)
 400 sec: 1266253 operations; 0 current ops/sec; [UPDATE 
AverageLatency(us)=1341720] [INSERT AverageLatency(us)=197941421.07] [CLEANUP 
AverageLatency(us)=1342113] 
Exception in thread "Thread-16" java.lang.NullPointerException
        at 
org.apache.hadoop.hbase.client.AsyncProcess.findDestLocation(AsyncProcess.java:288)
        at 
org.apache.hadoop.hbase.client.AsyncProcess.submit(AsyncProcess.java:233)
        at 
org.apache.hadoop.hbase.client.HTable.backgroundFlushCommits(HTable.java:811)
        at org.apache.hadoop.hbase.client.HTable.flushCommits(HTable.java:1192)
        at com.yahoo.ycsb.db.HBaseClient.cleanup(HBaseClient.java:106)
        at com.yahoo.ycsb.DBWrapper.cleanup(DBWrapper.java:73)
        at com.yahoo.ycsb.ClientThread.run(Client.java:307)
 410 sec: 1266253 operations; 0 current ops/sec;  [INSERT 
AverageLatency(us)=208462580.75]  
{noformat}

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