hbase-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ted Yu <yuzhih...@gmail.com>
Subject Re: consistent KeeperException$ConnectionLossException
Date Wed, 05 Jan 2011 03:34:57 GMT
Our code has been using new HTable(config, tableName) and this issue started
to occur dealing with relatively large data set.

On Tue, Jan 4, 2011 at 7:23 PM, Stack <stack@duboce.net> wrote:

> When you make a new HTable, do you do new HTable(tableName) or new
> HTable(config, tableName)?  If you are using the latter, you still run
> into the below?
>
> St.Ack
>
> On Tue, Jan 4, 2011 at 6:47 PM, Ted Yu <yuzhihong@gmail.com> wrote:
> > I increased max connections to 40.
> > I still got:
> >
> > 2011-01-04 21:30:05,701 WARN org.apache.zookeeper.server.NIOServerCnxn:
> Too
> > many connections from /10.202.50.79 - max is 40
> > 2011-01-04 21:30:06,072 WARN org.apache.zookeeper.server.NIOServerCnxn:
> Too
> > many connections from /10.202.50.80 - max is 40
> > 2011-01-04 21:30:06,458 WARN org.apache.zookeeper.server.NIOServerCnxn:
> Too
> > many connections from /10.202.50.80 - max is 40
> > 2011-01-04 21:30:06,944 WARN org.apache.zookeeper.server.NIOServerCnxn:
> Too
> > many connections from /10.202.50.79 - max is 40
> > 2011-01-04 21:30:07,273 WARN org.apache.zookeeper.server.NIOServerCnxn:
> Too
> > many connections from /10.202.50.80 - max is 40
> > 2011-01-04 21:30:07,665 WARN org.apache.zookeeper.server.NIOServerCnxn:
> Too
> > many connections from /10.202.50.79 - max is 40
> > 2011-01-04 21:30:07,876 WARN org.apache.zookeeper.server.NIOServerCnxn:
> > EndOfStreamException: Unable to read additional data from client
> sessionid
> > 0x12d52be9c2b001b, likely client has closed socket
> > 2011-01-04 21:30:07,876 INFO org.apache.zookeeper.server.NIOServerCnxn:
> > Closed socket connection for client /10.202.50.79:43150 which had
> sessionid
> > 0x12d52be9c2b001b
> > 2011-01-04 21:30:07,876 WARN org.apache.zookeeper.server.NIOServerCnxn:
> > EndOfStreamException: Unable to read additional data from client
> sessionid
> > 0x12d52be9c2b008b, likely client has closed socket
> > 2011-01-04 21:30:07,876 INFO org.apache.zookeeper.server.NIOServerCnxn:
> > Closed socket connection for client /10.202.50.79:26104 which had
> sessionid
> > 0x12d52be9c2b008b
> > 2011-01-04 21:30:07,876 WARN org.apache.zookeeper.server.NIOServerCnxn:
> > EndOfStreamException: Unable to read additional data from client
> sessionid
> > 0x12d52be9c2b010c, likely client has closed socket
> >
> > I verified maxClientCnxns of 30 in 0.20.6 where we didn't experience this
> > problem.
> >
> > More comment is welcome.
> >
> > On Tue, Jan 4, 2011 at 11:47 AM, Ted Yu <yuzhihong@gmail.com> wrote:
> >
> >> So I should be using HTablePool.
> >> For 0.20.6, I didn't see ConnectionLossException this often.
> >>
> >> I wonder if something changed from 0.20.6 to 0.90
> >>
> >> On Tue, Jan 4, 2011 at 11:29 AM, Stack <stack@duboce.net> wrote:
> >>
> >>> Are you passing the same Configuration instance when creating your
> >>> HTables?   See
> >>>
> http://people.apache.org/~stack/hbase-0.90.0-candidate-2/docs/apidocs/org/apache/hadoop/hbase/client/HConnectionManager.html<http://people.apache.org/%7Estack/hbase-0.90.0-candidate-2/docs/apidocs/org/apache/hadoop/hbase/client/HConnectionManager.html>
> <
> http://people.apache.org/%7Estack/hbase-0.90.0-candidate-2/docs/apidocs/org/apache/hadoop/hbase/client/HConnectionManager.html
> >
> >>> if not.  It explains how we figure whether zk client, rpc connections,
> >>> etc. are shared or not.
> >>>
> >>> St.Ack
> >>>
> >>> On Tue, Jan 4, 2011 at 11:12 AM, Jean-Daniel Cryans <
> jdcryans@apache.org>
> >>> wrote:
> >>> > It's a zookeeper setting, you cannot have by default more than 30
> >>> > connections from the same IP per ZK peer.
> >>> >
> >>> > If HBase is starting ZK for you, do change
> >>> > hbase.zookeeper.property.maxClientCnxns
> >>> >
> >>> > J-D
> >>> >
> >>> > On Tue, Jan 4, 2011 at 11:09 AM, Ted Yu <yuzhihong@gmail.com>
wrote:
> >>> >> Hi,
> >>> >> I am using HBase 0.90 and our job fails consistently with the
> following
> >>> >> exception:
> >>> >>
> >>> >> Caused by: org.apache.hadoop.hbase.ZooKeeperConnectionException:
> >>> >> org.apache.zookeeper.KeeperException$ConnectionLossException:
> >>> >> KeeperErrorCode = ConnectionLoss for /hbase
> >>> >>        at
> >>>
> org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.<init>(ZooKeeperWatcher.java:147)
> >>> >>        at
> >>>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getZooKeeperWatcher(HConnectionManager.java:1035)
> >>> >>        ... 19 more
> >>> >> Caused by:
> >>> org.apache.zookeeper.KeeperException$ConnectionLossException:
> >>> >> KeeperErrorCode = ConnectionLoss for /hbase
> >>> >>        at
> >>> org.apache.zookeeper.KeeperException.create(KeeperException.java:90)
> >>> >>        at
> >>> org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
> >>> >>        at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:608)
> >>> >>        at
> >>>
> org.apache.hadoop.hbase.zookeeper.ZKUtil.createAndFailSilent(ZKUtil.java:902)
> >>> >>        at
> >>>
> org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.<init>(ZooKeeperWatcher.java:133)
> >>> >>        ... 20 more
> >>> >>
> >>> >> Zookeeper quorum runs on the same node as NameNode. HMaster is
on
> >>> another
> >>> >> node. Hadoop is cdh3b2.
> >>> >>
> >>> >> In zookeeper log, I see (10.202.50.79 is the same node where the
> >>> exception
> >>> >> above happened):
> >>> >>
> >>> >> 2011-01-04 18:47:40,633 WARN
> org.apache.zookeeper.server.NIOServerCnxn:
> >>> Too
> >>> >> many connections from /10.202.50.79 - max is 30
> >>> >> 2011-01-04 18:47:41,187 WARN
> org.apache.zookeeper.server.NIOServerCnxn:
> >>> Too
> >>> >> many connections from /10.202.50.79 - max is 30
> >>> >> 2011-01-04 18:47:42,375 WARN
> org.apache.zookeeper.server.NIOServerCnxn:
> >>> Too
> >>> >> many connections from /10.202.50.79 - max is 30
> >>> >> 2011-01-04 18:47:42,447 WARN
> org.apache.zookeeper.server.NIOServerCnxn:
> >>> Too
> >>> >> many connections from /10.202.50.79 - max is 30
> >>> >> 2011-01-04 18:47:43,113 WARN
> org.apache.zookeeper.server.NIOServerCnxn:
> >>> >> EndOfStreamException: Unable to read additional data from client
> >>> sessionid
> >>> >> 0x12d5220eb970025, likely client has closed socket
> >>> >> 2011-01-04 18:47:43,113 INFO
> org.apache.zookeeper.server.NIOServerCnxn:
> >>> >> Closed socket connection for client /10.202.50.79:37845 which had
> >>> sessionid
> >>> >> 0x12d5220eb970025
> >>> >> 2011-01-04 18:47:43,113 WARN
> org.apache.zookeeper.server.NIOServerCnxn:
> >>> >> EndOfStreamException: Unable to read additional data from client
> >>> sessionid
> >>> >> 0x12d5220eb970087, likely client has closed socket
> >>> >>
> >>> >> Please advise what parameter I should tune.
> >>> >>
> >>> >> Thanks
> >>> >>
> >>> >
> >>>
> >>
> >>
> >
>

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message