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From yonghu <yongyong...@gmail.com>
Subject Re: slow operation in postPut
Date Thu, 01 Aug 2013 13:32:06 GMT
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 <yuzhihong@gmail.com> wrote:

> HTable is not thread safe.
>
> On Aug 1, 2013, at 5:58 AM, Pavel Hančar <pavel.hancar@gmail.com> 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
>

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