hbase-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: regionserver disconnection
Date Thu, 12 Nov 2009 19:14:01 GMT
Could we see the master log from around the same time the region
server got a session expired?

Thx,

J-D

On Thu, Nov 12, 2009 at 10:54 AM, Zhenyu Zhong <zhongresearch@gmail.com> wrote:
> Sorry, there was a typo in my email. But it is 10 minutes that I set in the
> hbase-site.xml.
>
> Please see the link.
> http://pastebin.com/m564c51bc
>
> Very  much appreciated.
> zhenyu
>
> On Thu, Nov 12, 2009 at 1:42 PM, Jean-Daniel Cryans <jdcryans@apache.org>wrote:
>
>> Usually if it was 10 minutes we would see sleepers complaining they
>> slept for way too long. In the logs I can see a 1 minute pause but not
>> 10 minutes because of the ZK debug. Are you sure you don't have a
>> typo? Like what you just wrote is not valid, you wrote
>> zookeeper.session.timout instead of zookeeper.session.timeout. Are you
>> sure it's distributed over the cluster? Could you pastebin
>> hbase-site.xml?
>>
>> Thx,
>>
>> J-D
>>
>> On Thu, Nov 12, 2009 at 10:28 AM, Zhenyu Zhong <zhongresearch@gmail.com>
>> wrote:
>> > J-D,
>> >
>> > Yes, that is weird. But it is what I have in the log. Probably the log is
>> > flushed by different threads, and one thread is blocked for a while?
>> >
>> > I set the zookeeper.session.timout=600000, which is 10 minutes. However,
>> we
>> > still see this problem.
>> >
>> > Does GC pause for such a long time period?
>> > I will try different GC options to see the differences.
>> >
>> > thanks
>> > zhenyu
>> >
>> >
>> > On Thu, Nov 12, 2009 at 1:10 PM, Jean-Daniel Cryans <jdcryans@apache.org
>> >wrote:
>> >
>> >> I see something weird
>> >>
>> >> 2009-11-12 15:04:36,370 WARN
>> >> org.apache.hadoop.hbase.regionserver.HRegionServer: Attempt=1
>> >> org.apache.hadoop.hbase.Leases$LeaseStillHeldException
>> >>        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
>> >> Method)
>> >>        at
>> >>
>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
>> >>        at
>> >>
>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
>> >> ...
>> >> 2009-11-12 15:03:52,682 DEBUG org.apache.zookeeper.ClientCnxn: Got
>> >> ping response for sessionid:0x224e55436ad0004 after 0ms
>> >> 2009-11-12 15:04:52,480 WARN org.apache.zookeeper.ClientCnxn:
>> >> Exception closing session 0x24e55436a0007d to
>> >> sun.nio.ch.SelectionKeyImpl@136f6ed1
>> >>
>> >> Goes back in time? I does look better tho. Did you say you set the
>> >> zookeeper session timeout higher in a previous thread? I'd be
>> >> interested to see if a higher (2-3 minutes) value would solve the
>> >> problem until java 7.
>> >>
>> >> The only thing that happens after that LeaseStillHeldException is that
>> >> for some reason (probably GC) the region server paused. This caused
>> >> the session to timeout and should be why the RS isn't connected to the
>> >> ZK quorum member.
>> >>
>> >> BTW we worked with the Zookeeper dev team to have more meaningful
>> >> exceptions and it's already committed in their trunk.
>> >>
>> >> J-D
>> >>
>> >> On Thu, Nov 12, 2009 at 8:40 AM, Zhenyu Zhong <zhongresearch@gmail.com>
>> >> wrote:
>> >> > Follow up on the regionserver disconnection:
>> >> >
>> >> > I made a few changes to the cluster setup.
>> >> > 1. split the regionserver and zookeeper quorum servers, such that
>> HRegion
>> >> > doesn't run on the same box as HQuorumPeer. I assume that there should
>> be
>> >> no
>> >> > disk io contention between the regionserver and zookeeper.
>> >> >    Now we have 14 regionservers, and 5 zookeeper quorum servers.
>> >> >
>> >> > Though I experienced 2 regionserver disconnection this morning, it
>> looks
>> >> > better from the regionserver log. (please see the following log)
>> >> >
>> >> >
>> >> > http://pastebin.com/m496dbfae
>> >> >
>> >> >
>> >> > I checked diskIO for one of the regionserver(192.168.100.116) during
>> the
>> >> > time it disconnected.
>> >> >
>> >> > Time: 03:04:58 AM
>> >> > Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
>> >> > sda             105.31      5458.83     19503.64 9043873239
>> 32312473676
>> >> > sda1              2.90         6.64        99.25   10993934  164433464
>> >> > sda2              1.72        23.76        30.25   39365817   50124008
>> >> > sda3              0.30         0.38         3.58     624930    5923000
>> >> > sda4            100.39      5428.06     19370.56 8992888270
>> 32091993204
>> >> >
>> >> >
>> >> > I also checked the zookeeper quorum server that the regionserver tried
>> to
>> >> > connect according to the log. However, I don't see 192.168.100.116 in
>> the
>> >> > client list of the zookeeper quorum server that the regionserver tried
>> to
>> >> > connect.
>> >> > Would that be a problem?
>> >> >
>> >> > Thu Nov 12 15:04:52 UTC 2009
>> >> > Zookeeper version: 3.2.1-808558, built on 08/27/2009 18:48 GMT
>> >> > Clients:
>> >> >  /192.168.100.127:43045[1](queued=0,recved=26,sent=0)
>> >> >  /192.168.100.131:39091[1](queued=0,recved=964,sent=0)
>> >> >  /192.168.100.124:35961[1](queued=0,recved=3266,sent=0)
>> >> >  /192.168.100.123:47935[1](queued=0,recved=233,sent=0)
>> >> >  /192.168.100.125:46931[1](queued=0,recved=2,sent=0)
>> >> >  /192.168.100.118:54924[1](queued=0,recved=295,sent=0)
>> >> >  /192.168.100.118:41390[1](queued=0,recved=2290,sent=0)
>> >> >  /192.168.100.136:42243[1](queued=0,recved=0,sent=0)
>> >> >
>> >> > Latency min/avg/max: 0/17/6333
>> >> > Received: 47111
>> >> > Sent: 0
>> >> > Outstanding: 0
>> >> > Zxid: 0x77000083f4
>> >> > Mode: leader
>> >> > Node count: 23
>> >> >
>> >> > Best,
>> >> > zhenyu
>> >> >
>> >> >
>> >> > On Wed, Nov 11, 2009 at 3:58 PM, Zhenyu Zhong <
>> zhongresearch@gmail.com
>> >> >wrote:
>> >> >
>> >> >> Stack
>> >> >>
>> >> >> I am very appreciated for your comments.
>> >> >> I will use the zookeeper monitoring script on my cluster and let it
>> run
>> >> >> overnight to see the result.
>> >> >> I will follow up the thread when I get anything.
>> >> >>
>> >> >> thanks
>> >> >> zhenyu
>> >> >>
>> >> >>
>> >> >> On Wed, Nov 11, 2009 at 3:52 PM, stack <stack@duboce.net> wrote:
>> >> >>
>> >> >>> I see these in your log too:
>> >> >>>
>> >> >>>
>> >> >>>   1. 2009-11-11 04:27:19,018 DEBUG org.apache.zookeeper.ClientCnxn:
>> Got
>> >> >>>   ping response for sessionid:0x424dfd908c50009 after 4544ms
>> >> >>>   2. 2009-11-11 04:27:19,018 DEBUG org.apache.zookeeper.ClientCnxn:
>> Got
>> >> >>>   ping response for sessionid:0x24dfd90c810002 after 4548ms
>> >> >>>   3. 2009-11-11 04:27:43,960 DEBUG org.apache.zookeeper.ClientCnxn:
>> Got
>> >> >>>   ping response for sessionid:0x424dfd908c50009 after 9030ms
>> >> >>>   4. 2009-11-11 04:27:43,960 DEBUG org.apache.zookeeper.ClientCnxn:
>> Got
>> >> >>>   ping response for sessionid:0x24dfd90c810002 after 9030ms
>> >> >>>   5. 2009-11-11 04:27:48,830 DEBUG org.apache.zookeeper.ClientCnxn:
>> Got
>> >> >>>   ping response for sessionid:0x424dfd908c50009 after 0ms
>> >> >>>   6. 2009-11-11 04:27:48,830 DEBUG org.apache.zookeeper.ClientCnxn:
>> Got
>> >> >>>   ping response for sessionid:0x24dfd90c810002 after 0ms
>> >> >>>
>> >> >>> Which would indicate lag talking to zk too.
>> >> >>>
>> >> >>> Appending HLog also seems to get steadily worse.
>> >> >>>
>> >> >>> I also see these:
>> >> >>>
>> >> >>>
>> >> >>>   1. 2009-11-11 04:27:01,233 WARN org.apache.zookeeper.ClientCnxn:
>> >> >>>    Exception closing session 0x24dfd90c810002 to
>> >> >>>    sun.nio.ch.SelectionKeyImpl@5e16a7e3
>> >> >>>   2. java.io.IOException: Read error rc = -1
>> >> >>>    java.nio.DirectByteBuffer[pos=0 lim=4 cap=4]
>> >> >>>    3.         at
>> >> >>>
>>  org.apache.zookeeper.ClientCnxn$SendThread.doIO(ClientCnxn.java:701)
>> >> >>>   4.         at
>> >> >>>
>>  org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:945)
>> >> >>>
>> >> >>>
>> >> >>> Were all 5 quorum members participating?  Check by doing "echo
>> stat|nc
>> >> >>> QUORUM_HOST port" for each member of quorum.... the below might
>> help:
>> >> >>>
>> >> >>> members="1,2,3,4,5"
>> >> >>> while true; do date; for i in $members; do echo $i; echo stat | nc
>> $i
>> >> >>> 2181;
>> >> >>> done; sleep 10; done
>> >> >>>
>> >> >>> We need to improve our zk_dump.  It just reports quorum members...
>> not
>> >> if
>> >> >>> they are actually participating or not.  The above will tell you if
>> >> dead
>> >> >>> or
>> >> >>> alive.
>> >> >>>
>> >> >>> Please report back after checking above and following the
>> Jean-Daniel
>> >> >>> prescription.
>> >> >>>
>> >> >>> Thanks,
>> >> >>> St.Ack
>> >> >>>
>> >> >>>
>> >> >>>
>> >> >>> On Wed, Nov 11, 2009 at 12:29 PM, Zhenyu Zhong <
>> >> zhongresearch@gmail.com
>> >> >>> >wrote:
>> >> >>>
>> >> >>> > Thanks a lot for the help.
>> >> >>> >
>> >> >>> > I understand that the change of disk configurations should be done
>> >> >>> > progressively such that HDFS can balance and recover from a disk
>> >> going
>> >> >>> > away.
>> >> >>> >
>> >> >>> > The data we are trying to import into HBase is about 200million
>> rows,
>> >> >>> each
>> >> >>> > row is about hundreds of bytes. Basically, we read in a text file
>> >> from
>> >> >>> > HDFS,
>> >> >>> > then  for each row in the text file, we fetch data from HBase
>> table,
>> >> we
>> >> >>> > compare the column value and update the latest value back into
>> HBase.
>> >> I
>> >> >>> was
>> >> >>> > suggested to use CheckAndPut.  Anyway this is the common usecase
>> on
>> >> my
>> >> >>> > side.
>> >> >>> >
>> >> >>> >
>> >> >>> > Many thanks
>> >> >>> > zhenyu
>> >> >>> >
>> >> >>> >
>> >> >>> >
>> >> >>> > On Wed, Nov 11, 2009 at 3:03 PM, Jean-Daniel Cryans <
>> >> >>> jdcryans@apache.org
>> >> >>> > >wrote:
>> >> >>> >
>> >> >>> > > 6 disks, 19 machines and you see those kind of issues? I'm quite
>> >> >>> > > surprised and I want to learn more about what you trying to to.
>> >> >>> > >
>> >> >>> > > But first, if hbase is managing ZK for you then you can change
>> the
>> >> >>> > > value of hbase.zookeeper.property.dataDir so that it points to
>> its
>> >> own
>> >> >>> > > mount. Make sure you also change dfs.data.dir in
>> conf/hdfs-site.xml
>> >> >>> > > (hadoop stuff) so that it stops pointing there (you should have
>> 6
>> >> >>> > > values there at the moment if you configured it correctly).
>> Doing
>> >> this
>> >> >>> > > could result in data loss if you do it all at once so do the
>> change
>> >> >>> > > progressively. This also means that you may have to keep a
>> seperate
>> >> >>> > > HDFS configuration for those particular nodes. Please ask more
>> >> >>> > > questions if it's not very clear.
>> >> >>> > >
>> >> >>> > > WRT to dedicating nodes to Zookeeeper, it makes sense only if
>> you
>> >> have
>> >> >>> > > a lot of nodes but in your case, unless there's also CPU
>> >> contention,
>> >> >>> > > you're good with only a dedicated disk.
>> >> >>> > >
>> >> >>> > > Now for what you are trying to do, is this a massive import that
>> >> goes
>> >> >>> > > over many hours? How big is each row? I'd love to get a lot of
>> >> details
>> >> >>> > > to help you optimize your cluster for your particular problem.
>> >> >>> > >
>> >> >>> > > Thx,
>> >> >>> > >
>> >> >>> > > J-D
>> >> >>> > >
>> >> >>> > > On Wed, Nov 11, 2009 at 11:51 AM, Zhenyu Zhong <
>> >> >>> zhongresearch@gmail.com>
>> >> >>> > > wrote:
>> >> >>> > > > J-D,
>> >> >>> > > >
>> >> >>> > > > Thanks a lot for the insightful comments.
>> >> >>> > > > We are running 5 zookeeper quorums now. On these 5 quorum
>> >> servers,
>> >> >>> we
>> >> >>> > > also
>> >> >>> > > > run datanode, tasktracker and regionserver.
>> >> >>> > > > Now we have 6 disks per machine.
>> >> >>> > > > If it is the disk IO saturation, is there anyway to configure
>> >> >>> zookeeper
>> >> >>> > > to
>> >> >>> > > > write to a seperate disk which is not the same one used by
>> HDFS?
>> >> >>> > > > Or shall we run zookeeper quorums on different nodes other
>> than
>> >> >>> HDFS?
>> >> >>> > > >
>> >> >>> > > > Are HLogs generated by Regionservers? Would it alleviate the
>> >> issue
>> >> >>> if
>> >> >>> > we
>> >> >>> > > use
>> >> >>> > > > the first 14 for regionserver, and the rest of 5 for
>> >> zookeeper?(In
>> >> >>> that
>> >> >>> > > > sense, the node running zookeeper quorum won't run
>> regionserver)
>> >> >>> > > >
>> >> >>> > > > I am very appreciated for your comments.
>> >> >>> > > >
>> >> >>> > > > Best,
>> >> >>> > > > zhenyu
>> >> >>> > > >
>> >> >>> > > >
>> >> >>> > > >
>> >> >>> > > > On Wed, Nov 11, 2009 at 2:30 PM, Jean-Daniel Cryans <
>> >> >>> > jdcryans@apache.org
>> >> >>> > > >wrote:
>> >> >>> > > >
>> >> >>> > > >> The problem seems to be that the IO is saturated. When you
>> see
>> >> >>> this:
>> >> >>> > > >>
>> >> >>> > > >> #
>> >> >>> > > >> 2009-11-11 04:28:10,308 WARN
>> >> >>> > > >> org.apache.hadoop.hbase.regionserver.HLog: IPC Server handler
>> 9
>> >> on
>> >> >>> > > >> 60021 took 6819ms appending an edit to hlog; editcount=370
>> >> >>> > > >> #
>> >> >>> > > >> 2009-11-11 04:28:10,308 WARN
>> >> >>> > > >> org.apache.hadoop.hbase.regionserver.HLog: IPC Server handler
>> 2
>> >> on
>> >> >>> > > >> 60021 took 4412ms appending an edit to hlog; editcount=371
>> >> >>> > > >>
>> >> >>> > > >> It's a sign that HDFS is slow. I guess that the zookeeper
>> quorum
>> >> >>> > > >> members are on those same nodes using the same disks? If so,
>> >> >>> there's
>> >> >>> > > >> the problem because Zookeeper needs to be able to commit
>> >> >>> transactions
>> >> >>> > > >> very fast and if your disks are already hogged then they have
>> to
>> >> >>> wait
>> >> >>> > > >> and you can get disconnections. Do you still have 19 quorum
>> >> >>> members?
>> >> >>> > > >> How many disks do you have per machine?
>> >> >>> > > >>
>> >> >>> > > >> Thx
>> >> >>> > > >>
>> >> >>> > > >> J-D
>> >> >>> > > >>
>> >> >>> > > >> On Wed, Nov 11, 2009 at 11:22 AM, Zhenyu Zhong <
>> >> >>> > zhongresearch@gmail.com
>> >> >>> > > >
>> >> >>> > > >> wrote:
>> >> >>> > > >> > Please take a look at the following regionserver log.
>> >> >>> > > >> > The error started to come out from 4:24am UTC to 4:29am
>> UTC.
>> >> >>> > > >> >
>> >> >>> > > >> > http://pastebin.com/m3717d064
>> >> >>> > > >> >
>> >> >>> > > >> > Thanks in advance.
>> >> >>> > > >> >
>> >> >>> > > >> > Best,
>> >> >>> > > >> > zhenyu
>> >> >>> > > >> >
>> >> >>> > > >> >
>> >> >>> > > >> > On Wed, Nov 11, 2009 at 2:01 PM, Jean-Daniel Cryans <
>> >> >>> > > jdcryans@apache.org
>> >> >>> > > >> >wrote:
>> >> >>> > > >> >
>> >> >>> > > >> >> Could you paste a bigger log trace (interested to see at
>> >> least
>> >> >>> all
>> >> >>> > > 300
>> >> >>> > > >> >> lines before that) in a pastebin?
>> >> >>> > > >> >>
>> >> >>> > > >> >> Thx,
>> >> >>> > > >> >>
>> >> >>> > > >> >> J-D
>> >> >>> > > >> >>
>> >> >>> > > >> >> On Wed, Nov 11, 2009 at 10:56 AM, Zhenyu Zhong <
>> >> >>> > > zhongresearch@gmail.com
>> >> >>> > > >> >
>> >> >>> > > >> >> wrote:
>> >> >>> > > >> >> > J-D,
>> >> >>> > > >> >> >
>> >> >>> > > >> >> > Thanks for the reply.
>> >> >>> > > >> >> >
>> >> >>> > > >> >> > The problem I have is one or more of the regionservers
>> >> >>> disconnect
>> >> >>> > > from
>> >> >>> > > >> >> the
>> >> >>> > > >> >> > cluster.
>> >> >>> > > >> >> >
>> >> >>> > > >> >> > I checked the resource usage including memory Heap usage
>> >> for
>> >> >>> > > >> >> regionserver,
>> >> >>> > > >> >> > and found nothing suspicious. The regionserver heap
>> usage
>> >> is
>> >> >>> way
>> >> >>> > > below
>> >> >>> > > >> >> the
>> >> >>> > > >> >> > maxHeap defined in jvm.
>> >> >>> > > >> >> >
>> >> >>> > > >> >> > So I checked zookeeper log, then I found the following
>> >> >>> > > >> >> > BufferUnderflowException, eventually it leads to
>> >> >>> SocketException:
>> >> >>> > > >> >> Transport
>> >> >>> > > >> >> > endpoint is not connected.
>> >> >>> > > >> >> >
>> >> >>> > > >> >> >
>> >> >>> > > >> >> > I also checked the regionserver log. It looks like the
>> >> >>> > regionserver
>> >> >>> > > >> tried
>> >> >>> > > >> >> to
>> >> >>> > > >> >> > connect to other zookeeper quorum server. It connects
>> >> >>> > successfully,
>> >> >>> > > >> but
>> >> >>> > > >> >> then
>> >> >>> > > >> >> > it complained about SocketException: transport endpoint
>> is
>> >> not
>> >> >>> > > >> connected.
>> >> >>> > > >> >> >
>> >> >>> > > >> >> > So both zookeeper log and regionserver log told me that
>> the
>> >> >>> > > transport
>> >> >>> > > >> >> > endpoint is not connected. I don't know why.
>> >> >>> > > >> >> >
>> >> >>> > > >> >> > I would be very appreciated if you could point me to the
>> >> right
>> >> >>> > > >> direction.
>> >> >>> > > >> >> >
>> >> >>> > > >> >> > Best,
>> >> >>> > > >> >> >
>> >> >>> > > >> >> >
>> >> >>> > > >> >> > Regionserver log:
>> >> >>> > > >> >> > 2009-11-11 04:24:53,718 INFO
>> >> org.apache.zookeeper.ClientCnxn:
>> >> >>> > > >> Attempting
>> >> >>> > > >> >> > connection to server superpyxis0018/
>> 192.168.100.132:2181
>> >> >>> > > >> >> > 2009-11-11 04:24:53,718 INFO
>> >> org.apache.zookeeper.ClientCnxn:
>> >> >>> > > Priming
>> >> >>> > > >> >> > connection to java.nio.channels.SocketChannel[connected
>> >> >>> local=/
>> >> >>> > > >> >> > 192.168.100.131:43065 remote=superpyxis0018/
>> >> >>> 192.168.100.132:2181
>> >> >>> > ]
>> >> >>> > > >> >> > 2009-11-11 04:24:53,718 INFO
>> >> org.apache.zookeeper.ClientCnxn:
>> >> >>> > > Server
>> >> >>> > > >> >> > connection successful
>> >> >>> > > >> >> > 2009-11-11 04:24:53,768 INFO
>> >> >>> > > >> >> > org.apache.hadoop.hbase.regionserver.HRegionServer: Got
>> >> >>> ZooKeeper
>> >> >>> > > >> event,
>> >> >>> > > >> >> > state: Disconnected, type: None, path: null
>> >> >>> > > >> >> > 2009-11-11 04:24:54,118 INFO
>> >> org.apache.zookeeper.ClientCnxn:
>> >> >>> > > >> Attempting
>> >> >>> > > >> >> > connection to server superpyxis0017/
>> 192.168.100.131:2181
>> >> >>> > > >> >> > 2009-11-11 04:24:54,118 INFO
>> >> org.apache.zookeeper.ClientCnxn:
>> >> >>> > > Priming
>> >> >>> > > >> >> > connection to java.nio.channels.SocketChannel[connected
>> >> >>> local=/
>> >> >>> > > >> >> > 192.168.100.131:46903 remote=superpyxis0017/
>> >> >>> 192.168.100.131:2181
>> >> >>> > ]
>> >> >>> > > >> >> > 2009-11-11 04:24:54,118 INFO
>> >> org.apache.zookeeper.ClientCnxn:
>> >> >>> > > Server
>> >> >>> > > >> >> > connection successful
>> >> >>> > > >> >> > 2009-11-11 04:24:54,118 WARN
>> >> org.apache.zookeeper.ClientCnxn:
>> >> >>> > > >> Exception
>> >> >>> > > >> >> > closing session 0x24dfd90c810002 to
>> >> >>> > > >> sun.nio.ch.SelectionKeyImpl@2dd78ccf
>> >> >>> > > >> >> > java.io.IOException: Read error rc = -1
>> >> >>> > > >> java.nio.DirectByteBuffer[pos=0
>> >> >>> > > >> >> > lim=4 cap=4]
>> >> >>> > > >> >> >        at
>> >> >>> > > >> >> >
>> >> >>> > >
>> >> org.apache.zookeeper.ClientCnxn$SendThread.doIO(ClientCnxn.java:701)
>> >> >>> > > >> >> >        at
>> >> >>> > > >> >> >
>> >> >>> >
>> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:945)
>> >> >>> > > >> >> > 2009-11-11 04:24:54,118 WARN
>> >> org.apache.zookeeper.ClientCnxn:
>> >> >>> > > Ignoring
>> >> >>> > > >> >> > exception during shutdown input
>> >> >>> > > >> >> > java.net.SocketException: Transport endpoint is not
>> >> connected
>> >> >>> > > >> >> >        at sun.nio.ch.SocketChannelImpl.shutdown(Native
>> >> Method)
>> >> >>> > > >> >> >        at
>> >> >>> > > >> >> >
>> >> >>> > >
>> >> sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:640)
>> >> >>> > > >> >> >        at
>> >> >>> > > >>
>> sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:360)
>> >> >>> > > >> >> >        at
>> >> >>> > > >> >> >
>> >> >>> > > >>
>> >> >>> >
>> >> org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:999)
>> >> >>> > > >> >> >        at
>> >> >>> > > >> >> >
>> >> >>> >
>> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:970)
>> >> >>> > > >> >> >
>> >> >>> > > >> >> >
>> >> >>> > > >> >> >
>> >> >>> > > >> >> >
>> >> >>> > > >> >> >
>> >> >>> > > >> >> > On Wed, Nov 11, 2009 at 1:40 PM, Jean-Daniel Cryans <
>> >> >>> > > >> jdcryans@apache.org
>> >> >>> > > >> >> >wrote:
>> >> >>> > > >> >> >
>> >> >>> > > >> >> >> I'm really not sure exactly what the situation is with
>> the
>> >> >>> > > >> >> >> java.nio.BufferUnderflowException, but what do you mean
>> by
>> >> >>> > > >> >> >> "regionserver disconnection"? Could you give more
>> details?
>> >> >>> > > >> >> >>
>> >> >>> > > >> >> >> Thx,
>> >> >>> > > >> >> >>
>> >> >>> > > >> >> >> J-D
>> >> >>> > > >> >> >>
>> >> >>> > > >> >> >> On Wed, Nov 11, 2009 at 10:34 AM, Zhenyu Zhong <
>> >> >>> > > >> zhongresearch@gmail.com
>> >> >>> > > >> >> >
>> >> >>> > > >> >> >> wrote:
>> >> >>> > > >> >> >> > I searched around and found HBASE-1645 "HBase could
>> be a
>> >> >>> > little
>> >> >>> > > >> more
>> >> >>> > > >> >> >> dainty
>> >> >>> > > >> >> >> > when zk is pulled out from under it"
>> >> >>> > > >> >> >> >
>> >> >>> > > >> >> >> > I am wondering whether my problem is related to this
>> >> >>> > HBase-1645.
>> >> >>> > > Or
>> >> >>> > > >> >> >> probably
>> >> >>> > > >> >> >> > has nothing to do with it?
>> >> >>> > > >> >> >> >
>> >> >>> > > >> >> >> > thanks
>> >> >>> > > >> >> >> >
>> >> >>> > > >> >> >> >
>> >> >>> > > >> >> >> > On Wed, Nov 11, 2009 at 12:02 PM, Zhenyu Zhong <
>> >> >>> > > >> >> zhongresearch@gmail.com
>> >> >>> > > >> >> >> >wrote:
>> >> >>> > > >> >> >> >
>> >> >>> > > >> >> >> >> Hi,
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >> >> I have been monitoring the system resources such as
>> >> memory
>> >> >>> > Heap
>> >> >>> > > >> usage
>> >> >>> > > >> >> >> for
>> >> >>> > > >> >> >> >> Regionserver, load average, network bandwidth, etc.
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >> >> I experienced a disconnection last night. When I
>> >> checked
>> >> >>> the
>> >> >>> > > >> memory
>> >> >>> > > >> >> Heap
>> >> >>> > > >> >> >> >> for Regionserver, it was 2336 which is way below the
>> >> max
>> >> >>> Heap
>> >> >>> > > >> 4096. I
>> >> >>> > > >> >> >> don't
>> >> >>> > > >> >> >> >> think it is Regionserver problem. The requests that
>> the
>> >> >>> > > >> regionserver
>> >> >>> > > >> >> got
>> >> >>> > > >> >> >> was
>> >> >>> > > >> >> >> >> about 126 which doesn't seem to be high. The load
>> >> average
>> >> >>> is
>> >> >>> > > kind
>> >> >>> > > >> of
>> >> >>> > > >> >> >> high
>> >> >>> > > >> >> >> >> >100. (but I saw disconnections while the load
>> average
>> >> is
>> >> >>> > > around
>> >> >>> > > >> 30).
>> >> >>> > > >> >> >> The
>> >> >>> > > >> >> >> >> bandwidth is not a problem.
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >> >> However, I found error messages from the zookeeper.
>> >> Please
>> >> >>> > see
>> >> >>> > > the
>> >> >>> > > >> >> >> >> following error messages. There are some
>> >> >>> > > >> >> >> >> BufferUnderflowException error, IOException
>> error,etc.
>> >> >>> > > >> >> >> >> May I ask what might be the causes that generate
>> these
>> >> >>> error
>> >> >>> > > >> >> messages?
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >> >> Many thanks
>> >> >>> > > >> >> >> >> zhenyu
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >> >> 2009-11-11 04:29:00,810 WARN
>> >> >>> > > org.apache.zookeeper.server.Request:
>> >> >>> > > >> >> >> Ignoring
>> >> >>> > > >> >> >> >> exception during toString
>> >> >>> > > >> >> >> >> java.nio.BufferUnderflowException
>> >> >>> > > >> >> >> >>         at
>> >> >>> > java.nio.HeapByteBuffer.get(HeapByteBuffer.java:127)
>> >> >>> > > >> >> >> >>         at
>> java.nio.ByteBuffer.get(ByteBuffer.java:675)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >>
>> >> >>> org.apache.zookeeper.server.Request.toString(Request.java:199)
>> >> >>> > > >> >> >> >>         at
>> java.lang.String.valueOf(String.java:2827)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > java.lang.StringBuilder.append(StringBuilder.java:115)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >>
>> >> >>> > > >> >>
>> >> >>> > > >>
>> >> >>> > >
>> >> >>> >
>> >> >>>
>> >>
>> org.apache.zookeeper.server.quorum.CommitProcessor.processRequest(CommitProcessor.java:167)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >>
>> >> >>> > > >> >>
>> >> >>> > > >>
>> >> >>> > >
>> >> >>> >
>> >> >>>
>> >>
>> org.apache.zookeeper.server.quorum.FollowerRequestProcessor.run(FollowerRequestProcessor.java:68)
>> >> >>> > > >> >> >> >> 2009-11-11 04:29:00,810 WARN
>> >> >>> > > >> >> org.apache.zookeeper.server.NIOServerCnxn:
>> >> >>> > > >> >> >> >> Exception causing close of session 0x424dfd908c50009
>> >> >>> > > >> >> >> >> due to java.io.IOException: Read error
>> >> >>> > > >> >> >> >> 2009-11-11 04:29:00,810 DEBUG
>> >> >>> > > >> >> org.apache.zookeeper.server.NIOServerCnxn:
>> >> >>> > > >> >> >> >> IOException stack trace
>> >> >>> > > >> >> >> >> java.io.IOException: Read error
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >>
>> >> >>> > >
>> >> org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:372)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >>
>> >> >>> > > >> >>
>> >> >>> > > >>
>> >> >>> > >
>> >> >>> >
>> >> >>>
>> >>
>> org.apache.zookeeper.server.NIOServerCnxn$Factory.run(NIOServerCnxn.java:221)
>> >> >>> > > >> >> >> >> 2009-11-11 04:29:00,810 DEBUG
>> >> >>> > > >> >> >> >> org.apache.zookeeper.server.quorum.CommitProcessor:
>> >> >>> > Processing
>> >> >>> > > >> >> request::
>> >> >>> > > >> >> >> >> sessionid:0x424dfd908c50009 type:setWatches
>> >> >>> > > >> cxid:0xfffffffffffffff8
>> >> >>> > > >> >> >> >> zxid:0xfffffffffffffffe txntype:unknown n/a
>> >> >>> > > >> >> >> >> 2009-11-11 04:29:00,810 WARN
>> >> >>> > > org.apache.zookeeper.server.Request:
>> >> >>> > > >> >> >> Ignoring
>> >> >>> > > >> >> >> >> exception during toString
>> >> >>> > > >> >> >> >> java.nio.BufferUnderflowException
>> >> >>> > > >> >> >> >>         at
>> >> >>> > java.nio.HeapByteBuffer.get(HeapByteBuffer.java:127)
>> >> >>> > > >> >> >> >>         at
>> java.nio.ByteBuffer.get(ByteBuffer.java:675)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >>
>> >> >>> org.apache.zookeeper.server.Request.toString(Request.java:199)
>> >> >>> > > >> >> >> >>         at
>> java.lang.String.valueOf(String.java:2827)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > java.lang.StringBuilder.append(StringBuilder.java:115)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >>
>> >> >>> > > >> >>
>> >> >>> > > >>
>> >> >>> > >
>> >> >>> >
>> >> >>>
>> >>
>> org.apache.zookeeper.server.FinalRequestProcessor.processRequest(FinalRequestProcessor.java:74)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >>
>> >> >>> > > >> >>
>> >> >>> > > >>
>> >> >>> > >
>> >> >>> >
>> >> >>>
>> >>
>> org.apache.zookeeper.server.quorum.CommitProcessor.run(CommitProcessor.java:73)
>> >> >>> > > >> >> >> >> 2009-11-11 04:29:00,810 DEBUG
>> >> >>> > > >> >> >> >> org.apache.zookeeper.server.FinalRequestProcessor:
>> >> >>> Processing
>> >> >>> > > >> >> request::
>> >> >>> > > >> >> >> >> sessionid:0x424dfd908c50009 type:setWatches
>> >> >>> > > >> cxid:0xfffffffffffffff8
>> >> >>> > > >> >> >> >> zxid:0xfffffffffffffffe txntype:unknown n/a
>> >> >>> > > >> >> >> >> 2009-11-11 04:29:00,810 WARN
>> >> >>> > > org.apache.zookeeper.server.Request:
>> >> >>> > > >> >> >> Ignoring
>> >> >>> > > >> >> >> >> exception during toString
>> >> >>> > > >> >> >> >> java.nio.BufferUnderflowException
>> >> >>> > > >> >> >> >>         at
>> >> >>> > java.nio.HeapByteBuffer.get(HeapByteBuffer.java:127)
>> >> >>> > > >> >> >> >>         at
>> java.nio.ByteBuffer.get(ByteBuffer.java:675)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >>
>> >> >>> org.apache.zookeeper.server.Request.toString(Request.java:199)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >>
>> >> >>>
>> org.apache.log4j.or.DefaultRenderer.doRender(DefaultRenderer.java:36)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > >
>> org.apache.log4j.or.RendererMap.findAndRender(RendererMap.java:80)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >>
>> >> >>> > > >> >>
>> >> >>> > > >>
>> >> >>> > >
>> >> >>> >
>> >> >>>
>> >>
>> org.apache.log4j.spi.LoggingEvent.getRenderedMessage(LoggingEvent.java:362)
>> >> >>> > > >> >> >> >> at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >>
>> >> >>> > > >> >>
>> >> >>> > > >>
>> >> >>> > >
>> >> >>> >
>> >> >>>
>> >>
>> org.apache.log4j.helpers.PatternParser$BasicPatternConverter.convert(PatternParser.java:403)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >>
>> >> >>> > > >> >>
>> >> >>> > > >>
>> >> >>> > >
>> >> >>> >
>> >> >>>
>> >>
>> org.apache.log4j.helpers.PatternConverter.format(PatternConverter.java:65)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >>
>> org.apache.log4j.PatternLayout.format(PatternLayout.java:502)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > >
>> org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:302)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >>
>> >> >>> > > >> >>
>> >> >>> > > >>
>> >> >>> > >
>> >> >>> >
>> >> >>>
>> >>
>> org.apache.log4j.DailyRollingFileAppender.subAppend(DailyRollingFileAppender.java:359)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >>
>> >> >>> org.apache.log4j.WriterAppender.append(WriterAppender.java:160)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >>
>> >> >>>
>> org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >>
>> >> >>> > > >> >>
>> >> >>> > > >>
>> >> >>> > >
>> >> >>> >
>> >> >>>
>> >>
>> org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> org.apache.log4j.Category.callAppenders(Category.java:206)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > org.apache.log4j.Category.forcedLog(Category.java:391)
>> >> >>> > > >> >> >> >>         at
>> >> >>> org.apache.log4j.Category.debug(Category.java:260)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >>
>> >> >>> > > >> >>
>> >> >>> > > >>
>> >> >>> > >
>> >> >>> >
>> >> >>>
>> >>
>> org.apache.zookeeper.server.FinalRequestProcessor.processRequest(FinalRequestProcessor.java:147)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >>
>> >> >>> > > >> >>
>> >> >>> > > >>
>> >> >>> > >
>> >> >>> >
>> >> >>>
>> >>
>> org.apache.zookeeper.server.quorum.CommitProcessor.run(CommitProcessor.java:73)
>> >> >>> > > >> >> >> >> 2009-11-11 04:29:00,810 WARN
>> >> >>> > > org.apache.zookeeper.server.Request:
>> >> >>> > > >> >> >> Ignoring
>> >> >>> > > >> >> >> >> exception during toString
>> >> >>> > > >> >> >> >> sessionid:0x424dfd908c50009 type:setWatches
>> >> >>> > > >> cxid:0xfffffffffffffff8
>> >> >>> > > >> >> >> >> zxid:0xfffffffffffffffe txntype:unknown n/a
>> >> >>> > > >> >> >> >> 2009-11-11 04:29:00,810 INFO
>> >> >>> > > >> >> org.apache.zookeeper.server.NIOServerCnxn:
>> >> >>> > > >> >> >> >> closing session:0x424dfd908c50009 NIOServerCnxn:
>> >> >>> > > >> >> >> >> java.nio.channels.SocketChannel[connected local=/
>> >> >>> > > >> >> 192.168.100.131:2181
>> >> >>> > > >> >> >> remote=/
>> >> >>> > > >> >> >> >> 192.168.100.131:35500]
>> >> >>> > > >> >> >> >> 2009-11-11 04:29:00,810 DEBUG
>> >> >>> > > >> >> org.apache.zookeeper.server.NIOServerCnxn:
>> >> >>> > > >> >> >> >> ignoring exception during input shutdown
>> >> >>> > > >> >> >> >> java.net.SocketException: Transport endpoint is not
>> >> >>> connected
>> >> >>> > > >> >> >> >>         at
>> sun.nio.ch.SocketChannelImpl.shutdown(Native
>> >> >>> > Method)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >>
>> >> >>> > >
>> >> sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:640)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >>
>> >> >>> sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:360)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >>
>> >> >>> > >
>> >> >>>
>> org.apache.zookeeper.server.NIOServerCnxn.close(NIOServerCnxn.java:848)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >>
>> >> >>> > >
>> >> org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:498)
>> >> >>> > > >> >> >> >>         at
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >>
>> >> >>> > > >> >>
>> >> >>> > > >>
>> >> >>> > >
>> >> >>> >
>> >> >>>
>> >>
>> org.apache.zookeeper.server.NIOServerCnxn$Factory.run(NIOServerCnxn.java:221)
>> >> >>> > > >> >> >> >>
>> >> >>> > > >> >> >> >
>> >> >>> > > >> >> >>
>> >> >>> > > >> >> >
>> >> >>> > > >> >>
>> >> >>> > > >> >
>> >> >>> > > >>
>> >> >>> > > >
>> >> >>> > >
>> >> >>> >
>> >> >>>
>> >> >>
>> >> >>
>> >> >
>> >>
>> >
>>
>

Mime
View raw message