Sorry I didn't know what you meant. I don't think it's sitting on the client
that long. Its during the next() call (on the first next call. for (Result
linkRowResult : scanner ) { ).
Why would this happen when i use addColumn vs. addFamily?
I will try to double the lease period. Thanks
stack-3 wrote:
>
> So, you are spending > 60 seconds in the client before going back to the
> regionserver? If so, can you change this? Or up the lease period on
> scanners > 60 seconds.
> St.Ack
>
> On Mon, Jun 29, 2009 at 1:26 PM, llpind <[email protected]> wrote:
>
>>
>> Both are defaults (60 second lease period, and 1 scanner caching). Yeah
>> it
>> is taking longer than 60 seconds.
>>
>>
>>
>> stack-3 wrote:
>> >
>> > Try upping timeout on scanners?
>> >
>> > Is your scanner spending longer than hbase.regionserver.lease.period --
>> 60
>> > seconds -- in map before it goes back to the server?
>> >
>> > What do you have for this value: hbase.client.scanner.caching?
>> >
>> > Is it 1 or something else? If > 1, then you'll be in client while N
>> are
>> > processed; there'll be no trip back to server to renew server-side
>> lease.
>> >
>> > St.Ack
>> >
>> > On Fri, Jun 26, 2009 at 2:49 PM, llpind <[email protected]> wrote:
>> >
>> >>
>> >> Tried it like this:
>> >>
>> >> Scan linkScan = new Scan (Bytes.toBytes(e + "|"), Bytes.toBytes(e +
>> >> "|A"));
>> >> linkScan.addColumn(Bytes.toBytes("type"),
>> >> Bytes.toBytes("ELECTRONICS"));
>> >> ResultScanner scanner = tblEntity.getScanner(linkScan);
>> >>
>> >> for (Result linkRowResult : scanner ) {
>> >> String row = Bytes.toString(linkRowResult.getRow());
>> >> }
>> >>
>> >>
>> >> Same exception. I would like to mentioned there is an outter loop
>> around
>> >> the block of code above changing variable 'e' to something else.
>> Also,
>> >> I
>> >> checked the type:ELECTRONICS column, and it isn't that sparse. As you
>> >> can
>> >> imagine an electronics department has a lot of items in it (in
>> relation
>> >> to
>> >> other departments), but a given item (row. e.g. Samsung blah) is
>> sparse.
>> >> Meaning given all the filters it may be sparse dataset. If it's
>> becuase
>> >> its
>> >> sparse, why would it work when i dont use addColumn, but use addFamily
>> >> instead?
>> >>
>> >>
>> >>
>> >>
>> >> Ryan Rawson wrote:
>> >> >
>> >> > Can you try with the constructor:
>> >> > Scan scanSpec = new Scan(startRow, stopRow);
>> >> >
>> >> > thanks,
>> >> > -ryan
>> >> >
>> >> > On Fri, Jun 26, 2009 at 2:18 PM, llpind<[email protected]>
>> wrote:
>> >> >>
>> >> >> It works find in shell when I do:
>> >> >>
>> >> >> scan 'tblStore', {COLUMNS =>'type:ELECTRONICS', STARTROW =>
>> >> 'TYPE1|TV|',
>> >> >> STOPROW => 'TYPE1|TV|A'}
>> >> >>
>> >> >> Am I doing something wrong in the API call?
>> >> >>
>> >> >>
>> >> >>
>> >> >> llpind wrote:
>> >> >>>
>> >> >>> Yeah I do have a type:ELECTRONIC column. I have a lot of data in
>> the
>> >> >>> tall
>> >> >>> table, so it may be sparse. I'm giving it filters like
>> start/stop
>> >> row
>> >> >>> key and column family/qualifier. This should still work IMO.
>> What
>> >> >>> other
>> >> >>> could be causing this?
>> >> >>>
>> >> >>>
>> >> >>> Ryan Rawson wrote:
>> >> >>>>
>> >> >>>> are you sure you have that column in your data? If you are
>> >> searching
>> >> >>>> for a column that doesnt exist or is very very very sparse, the
>> >> >>>> scanner will spend a lot of time searching only to find nothing,
>> >> thus
>> >> >>>> ending up with these kinds of exceptions....
>> >> >>>>
>> >> >>>> On Fri, Jun 26, 2009 at 12:35 PM, llpind<[email protected]>
>> >> wrote:
>> >> >>>>>
>> >> >>>>> This exception does not happen if I remove the addColumn, and
>> leave
>> >> >>>>> only
>> >> >>>>> addFamily (linkScan.addFamily(Bytes.toBytes("type")) .
>> >> >>>>>
>> >> >>>>> also, forgot I also have start and stop rows set:
>> >> >>>>>
>> >> >>>>>
>> >> >>>>>
>> >> >>>>> Scan linkScan = new Scan();.
>> >> >>>>> linkScan.addColumn(Bytes.toBytes("type"),
>> >> >>>>> Bytes.toBytes("ELECTRONICS"));
>> >> >>>>> linkScan.setStartRow (Bytes.toBytes(e + "|"));
>> >> >>>>> linkScan.setStopRow (Bytes.toBytes(e + " "));
>> >> >>>>> ResultScanner scanner = tblEntity.getScanner(linkScan);
>> >> >>>>> for (Result linkRowResult : scanner ) {
>> >> >>>>> String row = Bytes.toString(linkRowResult.getRow());
>> >> >>>>> }
>> >> >>>>>
>> >> >>>>>
>> >> >>>>>
>> >> >>>>>
>> >> >>>>> llpind wrote:
>> >> >>>>>>
>> >> >>>>>> Hey,
>> >> >>>>>>
>> >> >>>>>> I'm doing the following to get a scanner on a tall table:
>> >> >>>>>>
>> >> >>>>>> Scan linkScan = new Scan();.
>> >> >>>>>> linkScan.addColumn(Bytes.toBytes("type"),
>> >> >>>>>> Bytes.toBytes("ELECTRONICS"));
>> >> >>>>>> ResultScanner scanner = tblEntity.getScanner(linkScan);
>> >> >>>>>> for (Result linkRowResult : scanner ) {
>> >> >>>>>> String row = Bytes.toString(linkRowResult.getRow());
>> >> >>>>>> }
>> >> >>>>>>
>> >> >>>>>>
>> >> >>>>>>
>> ================================================================
>> >> >>>>>> at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
>> >> >>>>>> Caused by: org.apache.hadoop.hbase.UnknownScannerException:
>> >> >>>>>> org.apache.hadoop.hbase.UnknownScannerException:
>> >> -2823498412219891315
>> >> >>>>>> at
>> >> >>>>>>
>> >>
>> org.apache.hadoop.hbase.regionserver.HRegionServer.close(HRegionServer.java:1894)
>> >> >>>>>> at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown
>> >> >>>>>> Source)
>> >> >>>>>> at
>> >> >>>>>>
>> >>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> >> >>>>>> at java.lang.reflect.Method.invoke(Method.java:597)
>> >> >>>>>> at
>> >> >>>>>>
>> >> org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:643)
>> >> >>>>>> at
>> >> >>>>>>
>> >>
>> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:913)
>> >> >>>>>>
>> >> >>>>>> at
>> >> >>>>>> sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
>> >> >>>>>> Method)
>> >> >>>>>> at
>> >> >>>>>>
>> >>
>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
>> >> >>>>>> at
>> >> >>>>>>
>> >>
>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
>> >> >>>>>> at
>> >> >>>>>> java.lang.reflect.Constructor.newInstance(Constructor.java:513)
>> >> >>>>>> at
>> >> >>>>>>
>> >>
>> org.apache.hadoop.hbase.RemoteExceptionHandler.decodeRemoteException(RemoteExceptionHandler.java:94)
>> >> >>>>>> at
>> >> >>>>>>
>> >>
>> org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRegionServerWithRetries(HConnectionManager.java:928)
>> >> >>>>>> at
>> >> >>>>>>
>> >>
>> org.apache.hadoop.hbase.client.HTable$ClientScanner.nextScanner(HTable.java:1764)
>> >> >>>>>> at
>> >> >>>>>>
>> >>
>> org.apache.hadoop.hbase.client.HTable$ClientScanner.next(HTable.java:1859)
>> >> >>>>>> at
>> >> >>>>>>
>> >>
>> org.apache.hadoop.hbase.client.HTable$ClientScanner$1.hasNext(HTable.java:1915)
>> >> >>>>>> ... 8 more
>> >> >>>>>>
>> >> >>>>>>
>> >> >>>>>>
>> >> >>>>>
>> >> >>>>> --
>> >> >>>>> View this message in context:
>> >> >>>>>
>> >>
>> http://www.nabble.com/Scanner-exceptions-in-.20-tp24225950p24226108.html
>> >> >>>>> Sent from the HBase User mailing list archive at Nabble.com.
>> >> >>>>>
>> >> >>>>>
>> >> >>>>
>> >> >>>>
>> >> >>>
>> >> >>>
>> >> >>
>> >> >> --
>> >> >> View this message in context:
>> >> >>
>> >>
>> http://www.nabble.com/Scanner-exceptions-in-.20-tp24225950p24227420.html
>> >> >> Sent from the HBase User mailing list archive at Nabble.com.
>> >> >>
>> >> >>
>> >> >
>> >> >
>> >>
>> >> --
>> >> View this message in context:
>> >>
>> http://www.nabble.com/Scanner-exceptions-in-.20-tp24225950p24227741.html
>> >> Sent from the HBase User mailing list archive at Nabble.com.
>> >>
>> >>
>> >
>> >
>>
>> --
>> View this message in context:
>> http://www.nabble.com/Scanner-exceptions-in-.20-tp24225950p24261192.html
>> Sent from the HBase User mailing list archive at Nabble.com.
>>
>>
>
>
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