Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Threaded View
HBase >> mail # user >> slow operation in postPut


Copy link to this message
-
Re: slow operation in postPut
Use HTablePool instead. For more infor,
http://hbase.apache.org/book/client.html.
On Thu, Aug 1, 2013 at 3:32 PM, yonghu <[EMAIL PROTECTED]> wrote:

> If I want to use multi-thread with thread safe, which class should I use?
>
>
> On Thu, Aug 1, 2013 at 3:08 PM, Ted Yu <[EMAIL PROTECTED]> wrote:
>
>> HTable is not thread safe.
>>
>> On Aug 1, 2013, at 5:58 AM, Pavel Hančar <[EMAIL PROTECTED]> wrote:
>>
>> > Hello,
>> > I have a class extending BaseRegionObserver and I use the postPut
>> method to
>> > run a slow procedure. I'd like to run more these procedures in more
>> > threads. Is it possible to run more HTable.put(put) methods
>> concurrently? I
>> > tried, but I have this error for each thread:
>> >
>> > Exception in thread "Thread-3" java.lang.IndexOutOfBoundsException:
>> Index:
>> > 1, Size: 1
>> >        at java.util.ArrayList.rangeCheck(ArrayList.java:604)
>> >        at java.util.ArrayList.remove(ArrayList.java:445)
>> >        at
>> > org.apache.hadoop.hbase.client.HTable.flushCommits(HTable.java:966)
>> >        at org.apache.hadoop.hbase.client.HTable.doPut(HTable.java:811)
>> >        at org.apache.hadoop.hbase.client.HTable.put(HTable.java:786)
>> >        at img.PutFilesThread.run(PutFilesThread.java:74)
>> >        at java.lang.Thread.run(Thread.java:724)
>> >
>> > Anybody has an idea?
>> >  Thanks,
>> >  Pavel Hančar
>>
>
>