Thank you, St. Ack. We'll take the jstack next time.
On 03/23/2011 04:17 PM, Stack wrote:
Please take a jstack next time. What version of jvm are you using.
If older,< u21, and no apparent reason for the RegionServer lockup,
then it might be a JVM issue. Try adding -XX:+UseMembar to your
HBASE_OPTS (We've seen at least one case of RegionServer lockup
because of missed notifications).
St.Ack
On Wed, Mar 23, 2011 at 4:23 AM, Iulia Zidaru<[email protected]> wrote:
Hi all,
We are using CDH3B4.
The RegionServer containing .META. stopped working under normal load. The
region server process was up, it could be viewed in hbase admin interface,
but the requests, regions, usedHeap, maxHeap metrics were constant in time
and it couldn't be accessed. Other machines continued working, but the
performance was very bad. A huge log was created on the machine's HDFS. The
cluster came back to normal performance when I had killed the RegionServer.
In regionServer's log we got only a WARNING
(java.nio.channels.ClosedChannelException) cause by the communication with
the client machine. No logs while it was frozen.
Any idea?
Thank you,
Iulia
--
Iulia Zidaru
Java Developer
1&1 Internet AG - Bucharest/Romania - Web Components Romania
18 Mircea Eliade St
Sect 1, Bucharest
RO Bucharest, 012015
[email protected]
0040 31 223 9153
--
Iulia Zidaru
Java Developer
1&1 Internet AG - Bucharest/Romania - Web Components Romania
18 Mircea Eliade St
Sect 1, Bucharest
RO Bucharest, 012015
[email protected]
0040 31 223 9153
