[HBASE-9140] NPE in AsyncProcess

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: 0.95.2
• Component/s: Client

Environment

0.95.2 + Hadoop 2.0.4

• Assignee: Unassigned
• Reporter: Elliott Neil Clark
• Created: 06/Aug/13 16:11
• Updated: 16/Jun/22 17:50
• Resolved: 16/Jun/22 17:50

Description

Running YCSB progress got stuck for quite a while and then a Null Pointer Exception was thrown:

 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]