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Cc: "user@hbase.apache.org" <user@hbase.apache.org>
From: Ted Yu <yuzhihong@gmail.com>
Subject: Re: PreBatchMutate - Delete another row inside this method
Date: Mon, 24 Nov 2014 14:32:04 -0800
To: "user@hbase.apache.org" <user@hbase.apache.org>

Row '123' may be in a different region from the one row '111' is in.=20
Cross region RPC should be avoided in coprocessor.=20

Does your application require that the deletion of row '123' be in the same t=
ransaction as the mutation ?

Cheers

On Nov 24, 2014, at 12:31 PM, tvraju <tvvraju@gmail.com> wrote:

> Hi,
> IN PreBatchMutate method in Observer, I am trying to check whether a row ,=

> say '123', exists and delete the row.  This row is different from the
> current row , say '111' ,in the method, which has locked the current row.
> But Delete operation is waiting for the lock to '111' instead of '123'.
>=20
> Say,  I have a table - test_delete, cf:delete_row
> I have two rows 1) '123','defaultRow' 2) '111','111'
>=20
> I will try to re-insert the second row with '111','123'. IN PreBatchMutate=

> method, I am trying to check if row '123' exists and delete it.
>=20
> Result result =3D c.getEnvironment().getRegion().get(new
> Get(Bytes.toBytes('123')));
>                                byte[] deleteRow =3D result.getRow();
>                                logger.debug(String.format("Deleting row
> :%s", Bytes.toString(deleteRow)));
>                                Delete delete =3D new Delete(deleteRow);
>=20
> c.getEnvironment().getRegion().delete(delete);
>=20
> Exception :
>=20
> org.apache.hadoop.hbase.regionserver.HRegion: Failed getting lock in batch=

> put, row=3D111
> java.io.IOException: Timed out waiting for lock for row: 111
>=20
> Please advice.
>=20
>=20
>=20
>=20
>=20
> --
> View this message in context: http://apache-hbase.679495.n3.nabble.com/Pre=
BatchMutate-Delete-another-row-inside-this-method-tp4066298.html
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