See http://wiki.apache.org/hadoop/Hbase/FAQ#5
St.Ack
Slava Gorelik wrote:
Hi.First of all i want to say thank you for you assistance !!!
DEBUG on hadoop or hbase ? And how can i enable ?
fsck said that HDFS is healthy.
Best Regards and Thank You
On Tue, Oct 28, 2008 at 8:45 PM, stack <[EMAIL PROTECTED]> wrote:
Slava Gorelik wrote:
Hi.HDFS capacity is about 800gb (8 datanodes) and the current usage is
about
30GB. This is after total re-format of the HDFS that was made a hour
before.
BTW, the logs i sent are from the first exception that i found in them.
Best Regards.
Please enable DEBUG and retry. Send me all logs. What does the fsck on
HDFS say? There is something seriously wrong with your cluster that you are
having so much trouble getting it running. Lets try and figure it.
St.Ack
On Tue, Oct 28, 2008 at 7:12 PM, stack <[EMAIL PROTECTED]> wrote:
I took a quick look Slava (Thanks for sending the files). Here's a few
notes:
+ The logs are from after the damage is done; the transition from good to
bad is missing. If I could see that, that would help
+ But what seems to be plain is that that your HDFS is very sick. See
this
from head of one of the regionserver logs:
2008-10-27 23:41:12,682 WARN org.apache.hadoop.dfs.DFSClient:
DataStreamer
Exception: java.io.IOException: Unable to create new block.
at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2349)
at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream.access$1800(DFSClient.java:1735)
at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:1912)
2008-10-27 23:41:12,682 WARN org.apache.hadoop.dfs.DFSClient: Error
Recovery for block blk_-5188192041705782716_60000 bad datanode[0]
2008-10-27 23:41:12,685 ERROR
org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction/Split
failed for region
BizDB,1.1.PerfBO1.f2188a42-5eb7-4a6a-82ef-2da0d0ea4ce0,1225136351518
java.io.IOException: Could not get block locations. Aborting...
If HDFS is ailing, hbase is too. In fact, the regionservers will shut
themselves to protect themselves against damaging or losing data:
2008-10-27 23:41:12,688 FATAL
org.apache.hadoop.hbase.regionserver.Flusher:
Replay of hlog required. Forcing server restart
So, whats up with your HDFS? Not enough space alloted? What happens if
you run "./bin/hadoop fsck /"? Does that give you a clue as to what
happened? Dig in the datanode and namenode logs. Look for where the
exceptions start. It might give you a clue.
+ The suse regionserver log had garbage in it.
St.Ack
Slava Gorelik wrote:
Hi.
My happiness was very short :-( After i successfully added 1M rows (50k
each row) i tried to add 10M rows.
And after 3-4 working hours it started to dying. First one region server
is died, after another one and eventually all cluster is dead.
I attached log files (relevant part, archived) from region servers and
from the master.
Best Regards.
On Mon, Oct 27, 2008 at 11:19 AM, Slava Gorelik <
[EMAIL PROTECTED]<mailto:
[EMAIL PROTECTED]>> wrote:
Hi.
So far so good, after changing the file descriptors
and dfs.datanode.socket.write.timeout, dfs.datanode.max.xcievers
my cluster works stable.
Thank You and Best Regards.
P.S. Regarding deleting multiple columns missing functionality i
filled jira : https://issues.apache.org/jira/browse/HBASE-961
On Sun, Oct 26, 2008 at 12:58 AM, Michael Stack <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Slava Gorelik wrote:
Hi.Haven't tried yet them, i'll try tomorrow morning. In
general cluster is
working well, the problems begins if i'm trying to add 10M
rows, after 1.2M
if happened.
Anything else running beside the regionserver or datanodes
that would suck resources? When datanodes begin to slow, we
begin to see the issue Jean-Adrien's configurations address.
Are you uploading using MapReduce? Are TTs running on same
nodes as the datanode and regionserver? How are you doing the
upload? Describe what your uploader looks like (Sorry if
you've already done this).
I already changed the limit of files descriptors,
Good.
I'll try
to change the properties:
<property> <name>dfs.datanode.socket.write.timeout</name>
<value>0</value>
</property>
<property>
<name>dfs.datanode.max.xcievers</name>
<value>1023</value>
</property>
Yeah, try it.
And let you know, is any other prescriptions ? Did i miss
something ?
BTW, off topic, but i sent e-mail recently to the list and
i can't see it:
Is it possible to delete multiple columns in any way by
regex : for example
colum_name_* ?
Not that I know of. If its not in the API, it should be.
Mind filing a JIRA?
Thanks Slava.
St.Ack
