Hi there-
I think there are two subjects here:
1) the fact that HTable isn't thread-safe
2) how counters work
Even if you are incrementing counters, you shouldn't be sharing HTable
instances across threads.
Counters get updated atomically on the RS, not on the client.
Counter behavior isn
I have an HTable instance instantiated as part of a singleton service. This
singleton service is called from different threads from different parts of
the app. Reading through the HTable docs suggests not to use single HTable
instance for updates, if it's true how can incrementColumnValue provide
t
Actually it's on the family level.
J-D
On Wed, Jul 6, 2011 at 1:53 PM, Stack wrote:
> Replication is table-scoped.
> St.Ack
>
> On Tue, Jul 5, 2011 at 1:46 AM, James Ram wrote:
>> Hi,
>>
>> Is it possible to replicate a particular dataset to another cluster
>> instead of replicating the whole d
My guess is that it needs to ask the master for the regions so it can
make the splits used by mapper tasks (to find master, needs to ask zk,
etc.). Check it out yourself under the mapreduce package?
St.Ack
On Wed, Jul 20, 2011 at 3:06 PM, Andre Reiter wrote:
> Hi Ted,
> thanks for the reply,
>
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Hi Ted,
thanks for the reply,
at the moment i'm hust wondering, why the client creates a zookeeper connection
at all
all the client has to do, is to schedule a MR job, which is done by connecting
to the jobtracker and to provide all the needed stuff, config, some extra
resources in the distrib
This seems to be cdh related.
>> either the map HConnectionManager.HBASE_INSTANCES does not contain the
connection for the current config
You need to pass the same conf object.
In trunk, I added the following:
public static void deleteStaleConnection(HConnection connection) {
See
http://zhihon
unfortunatelly there was no such LOG entry... :-(
our versions:
hadoop-0.20.2-CDH3B4
hbase-0.90.1-CDH3B4
zookeeper-3.3.2-CDH3B4
either the map HConnectionManager.HBASE_INSTANCES does not contain the
connection for the current config, or HConnectionImplementation.zooKeeper is
null
but the zooke
Andre:
So you didn't see the following in client log (HConnectionManager line 1067)
?
LOG.info("Closed zookeeper sessionid=0x" +
Long.toHexString(this.zooKeeper.getZooKeeper().getSessionId()));
HConnectionManager.deleteConnection(conf, true) is supposed to close zk
connection in 0
Hi St.Ack,
actually calling HConnectionManager.deleteConnection(conf, true); does not
close the connection to the zookeeper
i still can see the connection established...
andre
Stack wrote:
Then similarly, can you do the deleteConnection above in your client
or reuse the Configuration client
Thanks, Andy.
On Mon, Jul 18, 2011 at 2:49 PM, allan yan wrote:
> Hi,
> I don't know how to report issue to HBase team. So I just post it here.
> There might be a bug for REST web service to get rows with given startRow
> and endRow.
> For example, to get a list of rows with startRow=testrow1, en
Then similarly, can you do the deleteConnection above in your client
or reuse the Configuration client-side that you use setting up the
job?
St.Ack
On Wed, Jul 20, 2011 at 12:13 AM, Andre Reiter wrote:
> Hi Stack,
>
> just to make clear, actually the connections to the zookeeper being kept are
>
On Wed, Jul 20, 2011 at 1:19 AM, Jeff wrote:
> Caused by: java.net.ConnectException: Connection refused
This is root of the prob.
Its odd though because you are standalone.
Any exceptions before those you post here?
Anything about this box that preventing process connect to itself on
different
On Wed, Jul 20, 2011 at 8:22 AM, Xu-Feng Mao wrote:
> Hi,
> We're running a 25-node regionserver hbase cluster, using cdh3u0.
> 1. We run into several jvm crashes on master today. It seems like jvm
> issues, as I attached the hs_error_pid files
> with this message. Just want to confirm that if thi
On Wed, Jul 20, 2011 at 7:00 AM, Srikanth P. Shreenivas
wrote:
> We are trying to design a HBase table, and we seem to be tending towards
> packing 3 fields into our row key, as we need to be able to do random access
> using these 3 fields.
> The row key is turning out to be around 93 characters
Hi,
We're running a 25-node regionserver hbase cluster, using cdh3u0.
1. We run into several jvm crashes on master today. It seems like jvm
issues, as I attached the hs_error_pid files
with this message. Just want to confirm that if this is really a jvm issue,
or maybe some master issue trigger t
2011/7/20 勇胡 :
> Maybe I have to update my hbase.
>
Yes. This would be a good idea.
St.Ack
Thanks for your response. I just found the information from mailing archive.
It is as follows:
"In the shell you can ask for more versions by saying: get 'table', 'row',
{COLUMN => 'family', VERSIONS => 4}". By the way, my hbase version is
0.90.2, I used help 'get' to see the examples and I didn't
If you look at help of get command, you would see:
hbase> get 't1', 'r1', {COLUMN => 'c1', TIMERANGE => [ts1, ts2], VERSIONS
=> 4}
On Wed, Jul 20, 2011 at 7:09 AM, 勇胡 wrote:
> Hello,
>
> I created a table named 'score', and I issue put command twice:
>
> put 'score','tom','course:math','1.2'
>
I believe you are hitting the default zookeeper limit. If hbase is not
managing zookeeper, edit zoo.cfg on the zookeeper server and add
maxClientCnxns=0 and restart the server. Otherwise there is a similar
setting on hbase, but can't recall it.
On Tue, Jul 19, 2011 at 11:36 PM, King JKing wrote:
Hello,
I created a table named 'score', and I issue put command twice:
put 'score','tom','course:math','1.2'
put 'score','tom','course:math','1.3'
Now the cell has two data versions, I want to read these two versions, so I
issue a command,
get 'score', 'tom', {COLUMN=>'course:math',VERSION=>2}
Hi,
We are trying to design a HBase table, and we seem to be tending towards
packing 3 fields into our row key, as we need to be able to do random access
using these 3 fields.
The row key is turning out to be around 93 characters in size.
Is it okay to use a 100 character long row keys? It wil
Hi,
I am trying to start HBase 0.90.3 in standalone mode and I get the following
errors. I follow the instructions in the QuckStart at apache site. I set the
JAVA_HOME and the conf/hbase-site.xml accordingly.
I start HBase with bin/start-hbase.sh script and the start the shell using
bin/start-hb
Hi Stack,
just to make clear, actually the connections to the zookeeper being kept are
not on our mappers (tasktrackers) but on the client, which schedules the MR job
i think, the mappers are just fine, as they are
andre
Stack wrote:
Can you reuse Configuration instances though the "configu
Can you reuse Configuration instances though the "configuration" changes?
Else in your Mapper#cleanup, call HTable.close() then try
HConnectionManager.deleteConnection(table.getConfiguration()) after
close (could be issue with executors used by multi* operations not
completing before delete of con
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