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Posted to user@hbase.apache.org by Steen Manniche <bo...@gmail.com> on 2017/09/12 09:34:46 UTC
Loading of coprocessors on a region multiple times
Hi list.
I have a coprocessor which has been loaded on a table 'plot'. The
table has 2697 regions across 8 nodes. Recently, I have observed some
strangeness in the log-files:
2017-09-12 11:00:28,461 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
2017-09-12 11:00:29,080 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
2017-09-12 11:00:29,648 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
2017-09-12 11:00:30,464 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
2017-09-12 11:00:31,204 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
2017-09-12 11:00:31,874 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
2017-09-12 11:00:32,253 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
2017-09-12 11:01:52,703 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
2017-09-12 11:02:08,403 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
2017-09-12 11:02:18,215 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
2017-09-12 11:02:37,779 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
2017-09-12 11:02:49,227 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
2017-09-12 11:03:01,271 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
2017-09-12 11:09:10,639 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
2017-09-12 11:14:08,939 INFO [RS_OPEN_REGION-sild03:16020-16]
regionserver.RegionCoprocessorHost: Loaded coprocessor
net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
protein_ee successfully.
All in all, There are thousand of these log-lines on the regionserver
logs. The coprocessor is quite simple
(https://github.com/manniche/hbase-table-event-signaler/blob/develop/src/main/java/net/nzcorp/hbase/tableevent_signaler/TableEventSignaler.java)
I would assume to find this line exactly once per region, but it seems
that the `start()` method on the coprocessor is called multiple times?
the hbase describe table shows:
hbase(main):007:0> describe 'plot'
Table plot is ENABLED
plot, {TABLE_ATTRIBUTES => {coprocessor$5 =>
'hdfs:///user/hbase/nzcorp-tableevent-signaler-0.10.0.jar|net.nzcorp.hbase.tableevent_signaler.TableEventSignaler|5|destination_table=plot,secondary_index_table=plot_index,seco
ndary_index_cf=p,source_column_family=e,target_column_family=e,amq_address=amqp://*******:******@rmq-server1:5672/hbase_events,send_value=true,filter_qualifiers=dna_accession_number|feature_accession_number'}
[... info on column families ...]
9 row(s) in 0.3650 seconds
We are running hbase version 1.1.2
Best regards,
Steen
Re: Loading of coprocessors on a region multiple times
Posted by Ted Yu <yu...@gmail.com>.
Here is how ExecutorType forms the name:
String getExecutorName(String serverName) {
return this.toString() + "-" + serverName.replace("%", "%%");
Then Executor is created:
Executor hbes = new Executor(name, maxThreads, this.
eventHandlerListeners);
In your sample, 16 was the thread number.
Cheers
On Tue, Sep 12, 2017 at 4:31 AM, Steen Manniche <bo...@gmail.com> wrote:
> Hi Ted,
>
> thanks for your quick answer. It would indeed. But since we have in
> the vicinity of 6K such log-lines for the table in a single
> regionserver, should I then interpret the the number coming after the
> RS_OPEN_REGION-{servername:port}- as the thread id? E.g.
> RS_OPEN_REGION-sild03:16020-16 as thread number 16 that operates on
> the region?
>
> Best regards,
> Steen
>
> On Tue, Sep 12, 2017 at 12:48 PM, Ted Yu <yu...@gmail.com> wrote:
> > loadTableCoprocessors() is called from RegionCoprocessorHost ctor.
> > In HRegion ctor, you would find:
> >
> > this.coprocessorHost = new RegionCoprocessorHost(this, rsServices,
> > conf);
> >
> > Meaning RegionCoprocessorHost is instantiated per region.
> > This can explain why you saw the log multiple times.
> >
> > On Tue, Sep 12, 2017 at 2:34 AM, Steen Manniche <bo...@gmail.com>
> wrote:
> >
> >> Hi list.
> >>
> >> I have a coprocessor which has been loaded on a table 'plot'. The
> >> table has 2697 regions across 8 nodes. Recently, I have observed some
> >> strangeness in the log-files:
> >>
> >> 2017-09-12 11:00:28,461 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >> 2017-09-12 11:00:29,080 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >> 2017-09-12 11:00:29,648 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >> 2017-09-12 11:00:30,464 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >> 2017-09-12 11:00:31,204 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >> 2017-09-12 11:00:31,874 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >> 2017-09-12 11:00:32,253 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >> 2017-09-12 11:01:52,703 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >> 2017-09-12 11:02:08,403 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >> 2017-09-12 11:02:18,215 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >> 2017-09-12 11:02:37,779 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >> 2017-09-12 11:02:49,227 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >> 2017-09-12 11:03:01,271 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >> 2017-09-12 11:09:10,639 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >> 2017-09-12 11:14:08,939 INFO [RS_OPEN_REGION-sild03:16020-16]
> >> regionserver.RegionCoprocessorHost: Loaded coprocessor
> >> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> >> protein_ee successfully.
> >>
> >> All in all, There are thousand of these log-lines on the regionserver
> >> logs. The coprocessor is quite simple
> >> (https://github.com/manniche/hbase-table-event-signaler/
> >> blob/develop/src/main/java/net/nzcorp/hbase/tableevent_
> >> signaler/TableEventSignaler.java)
> >>
> >> I would assume to find this line exactly once per region, but it seems
> >> that the `start()` method on the coprocessor is called multiple times?
> >>
> >> the hbase describe table shows:
> >>
> >> hbase(main):007:0> describe 'plot'
> >> Table plot is ENABLED
> >> plot, {TABLE_ATTRIBUTES => {coprocessor$5 =>
> >> 'hdfs:///user/hbase/nzcorp-tableevent-signaler-0.10.0.
> >> jar|net.nzcorp.hbase.tableevent_signaler.TableEventSignaler|5|
> >> destination_table=plot,secondary_index_table=plot_index,seco
> >> ndary_index_cf=p,source_column_family=e,target_column_
> >> family=e,amq_address=amqp://*******:******@rmq-server1:5672/
> >> hbase_events,send_value=true,filter_qualifiers=dna_
> >> accession_number|feature_accession_number'}
> >> [... info on column families ...]
> >> 9 row(s) in 0.3650 seconds
> >>
> >> We are running hbase version 1.1.2
> >>
> >> Best regards,
> >> Steen
> >>
>
Re: Loading of coprocessors on a region multiple times
Posted by Steen Manniche <bo...@gmail.com>.
Hi Ted,
thanks for your quick answer. It would indeed. But since we have in
the vicinity of 6K such log-lines for the table in a single
regionserver, should I then interpret the the number coming after the
RS_OPEN_REGION-{servername:port}- as the thread id? E.g.
RS_OPEN_REGION-sild03:16020-16 as thread number 16 that operates on
the region?
Best regards,
Steen
On Tue, Sep 12, 2017 at 12:48 PM, Ted Yu <yu...@gmail.com> wrote:
> loadTableCoprocessors() is called from RegionCoprocessorHost ctor.
> In HRegion ctor, you would find:
>
> this.coprocessorHost = new RegionCoprocessorHost(this, rsServices,
> conf);
>
> Meaning RegionCoprocessorHost is instantiated per region.
> This can explain why you saw the log multiple times.
>
> On Tue, Sep 12, 2017 at 2:34 AM, Steen Manniche <bo...@gmail.com> wrote:
>
>> Hi list.
>>
>> I have a coprocessor which has been loaded on a table 'plot'. The
>> table has 2697 regions across 8 nodes. Recently, I have observed some
>> strangeness in the log-files:
>>
>> 2017-09-12 11:00:28,461 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>> 2017-09-12 11:00:29,080 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>> 2017-09-12 11:00:29,648 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>> 2017-09-12 11:00:30,464 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>> 2017-09-12 11:00:31,204 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>> 2017-09-12 11:00:31,874 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>> 2017-09-12 11:00:32,253 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>> 2017-09-12 11:01:52,703 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>> 2017-09-12 11:02:08,403 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>> 2017-09-12 11:02:18,215 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>> 2017-09-12 11:02:37,779 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>> 2017-09-12 11:02:49,227 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>> 2017-09-12 11:03:01,271 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>> 2017-09-12 11:09:10,639 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>> 2017-09-12 11:14:08,939 INFO [RS_OPEN_REGION-sild03:16020-16]
>> regionserver.RegionCoprocessorHost: Loaded coprocessor
>> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
>> protein_ee successfully.
>>
>> All in all, There are thousand of these log-lines on the regionserver
>> logs. The coprocessor is quite simple
>> (https://github.com/manniche/hbase-table-event-signaler/
>> blob/develop/src/main/java/net/nzcorp/hbase/tableevent_
>> signaler/TableEventSignaler.java)
>>
>> I would assume to find this line exactly once per region, but it seems
>> that the `start()` method on the coprocessor is called multiple times?
>>
>> the hbase describe table shows:
>>
>> hbase(main):007:0> describe 'plot'
>> Table plot is ENABLED
>> plot, {TABLE_ATTRIBUTES => {coprocessor$5 =>
>> 'hdfs:///user/hbase/nzcorp-tableevent-signaler-0.10.0.
>> jar|net.nzcorp.hbase.tableevent_signaler.TableEventSignaler|5|
>> destination_table=plot,secondary_index_table=plot_index,seco
>> ndary_index_cf=p,source_column_family=e,target_column_
>> family=e,amq_address=amqp://*******:******@rmq-server1:5672/
>> hbase_events,send_value=true,filter_qualifiers=dna_
>> accession_number|feature_accession_number'}
>> [... info on column families ...]
>> 9 row(s) in 0.3650 seconds
>>
>> We are running hbase version 1.1.2
>>
>> Best regards,
>> Steen
>>
Re: Loading of coprocessors on a region multiple times
Posted by Ted Yu <yu...@gmail.com>.
loadTableCoprocessors() is called from RegionCoprocessorHost ctor.
In HRegion ctor, you would find:
this.coprocessorHost = new RegionCoprocessorHost(this, rsServices,
conf);
Meaning RegionCoprocessorHost is instantiated per region.
This can explain why you saw the log multiple times.
On Tue, Sep 12, 2017 at 2:34 AM, Steen Manniche <bo...@gmail.com> wrote:
> Hi list.
>
> I have a coprocessor which has been loaded on a table 'plot'. The
> table has 2697 regions across 8 nodes. Recently, I have observed some
> strangeness in the log-files:
>
> 2017-09-12 11:00:28,461 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
> 2017-09-12 11:00:29,080 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
> 2017-09-12 11:00:29,648 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
> 2017-09-12 11:00:30,464 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
> 2017-09-12 11:00:31,204 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
> 2017-09-12 11:00:31,874 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
> 2017-09-12 11:00:32,253 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
> 2017-09-12 11:01:52,703 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
> 2017-09-12 11:02:08,403 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
> 2017-09-12 11:02:18,215 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
> 2017-09-12 11:02:37,779 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
> 2017-09-12 11:02:49,227 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
> 2017-09-12 11:03:01,271 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
> 2017-09-12 11:09:10,639 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
> 2017-09-12 11:14:08,939 INFO [RS_OPEN_REGION-sild03:16020-16]
> regionserver.RegionCoprocessorHost: Loaded coprocessor
> net.nzcorp.hbase.tableevent_signaler.TableEventSignaler from HTD of
> protein_ee successfully.
>
> All in all, There are thousand of these log-lines on the regionserver
> logs. The coprocessor is quite simple
> (https://github.com/manniche/hbase-table-event-signaler/
> blob/develop/src/main/java/net/nzcorp/hbase/tableevent_
> signaler/TableEventSignaler.java)
>
> I would assume to find this line exactly once per region, but it seems
> that the `start()` method on the coprocessor is called multiple times?
>
> the hbase describe table shows:
>
> hbase(main):007:0> describe 'plot'
> Table plot is ENABLED
> plot, {TABLE_ATTRIBUTES => {coprocessor$5 =>
> 'hdfs:///user/hbase/nzcorp-tableevent-signaler-0.10.0.
> jar|net.nzcorp.hbase.tableevent_signaler.TableEventSignaler|5|
> destination_table=plot,secondary_index_table=plot_index,seco
> ndary_index_cf=p,source_column_family=e,target_column_
> family=e,amq_address=amqp://*******:******@rmq-server1:5672/
> hbase_events,send_value=true,filter_qualifiers=dna_
> accession_number|feature_accession_number'}
> [... info on column families ...]
> 9 row(s) in 0.3650 seconds
>
> We are running hbase version 1.1.2
>
> Best regards,
> Steen
>