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https://issues.apache.org/jira/browse/HBASE-9140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13730930#comment-13730930
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Nicolas Liochon commented on HBASE-9140:
----------------------------------------
I looked at the code, I don't have a clear scenario. When we add to the list,
it can't be null, we have
currentWriteBufferSize += put.heapSize();
writeAsyncBuffer.add(put);
so if 'put' is null we NPE before adding it to the list.
You're working on it Elliott? What's the ycsb setting you used?
> 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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