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From Lyska Anton <ant...@wildec.com>
Subject Re: Insert blocked
Date Tue, 24 Jul 2012 10:09:04 GMT
Hi,

after first insert you are closing your table in finally block. thats why thread hangs

24.07.2012 3:41, Mohit Anchlia пишет:
> I am now using HTablePool but still the call hangs at "put". My code is
> something like this:
>
>
> hTablePool = *new* HTablePool(config,*MAX_POOL_SIZE*);
>
> result = *new* SessionTimelineDAO(hTablePool.getTable(t.name()),
> ColumnFamily.*S_T_MTX*);
>
>   public SessionTimelineDAO(HTableInterface hTableInterface, ColumnFamily
> cf){
>    this.tableInt = hTableInterface;
>    this.cf = cf.name().getBytes();
>    log.info("Table " + hTableInterface + " " + cf);
>   }
>
>   @Override
>   public void create(DataStoreModel dm) throws DataStoreException {
>    if(null == dm || null == dm.getKey()){
>     log.error("DataStoreModel is invalid");
>     return;
>    }
>
>    Put p = new Put(dm.getKey().array());
>
>    for(ByteBuffer bf : dm.getCols().keySet()){
>     p.add(cf, bf.array(), dm.getColumnValue(bf).array());
>    }
>
>    try {
>     log.info("In create ");
>     tableInt.put(p);
>    } catch (IOException e) {
>     log.error("Error writing " , e);
>     throw new DataStoreException(e);
>    } finally{
>     cleanUp();
>
>    }
>   }
>
>
>   private void cleanUp() {
>    if(null != tableInt){
>     try {
>      tableInt.close();
>     } catch (IOException e) {
>      log.error("Failed while closing table interface", e);
>     }
>    }
>   }
> On Mon, Jul 23, 2012 at 4:15 PM, Mohit Anchlia <mohitanchlia@gmail.com>wrote:
>
>>
>>   On Mon, Jul 23, 2012 at 3:54 PM, Elliott Clark <eclark@stumbleupon.com>wrote:
>>
>>> HTable is not thread safe[1]. It's better to use HTablePool if you want to
>>> share things across multiple threads.[2]
>>>
>>> 1
>>> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/HTable.html
>>> 2
>>>
>>> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/HTablePool.html
>>>
>>> Thanks! I'll change my code to use HtablePool
>>> On Mon, Jul 23, 2012 at 3:48 PM, Mohit Anchlia <mohitanchlia@gmail.com
>>>> wrote:
>>>> I am writing a stress tool to test my specific use case. In my current
>>>> implementation HTable is a global static variable that I initialize just
>>>> once and use it accross multiple threads. Is this ok?
>>>>
>>>> My row key consists of (timestamp - (timestamp % 1000)) and cols are
>>>> counters. What I am seeing is that when I run my test after first row is
>>>> created the application just hangs. I just wanted to check if there are
>>>> obvious things that I should watch out for.
>>>>
>>>> I am currently testing few threads in eclipse, but I'll still try and
>>>> generate stackTrace
>>>>
>>


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