Thanks a lot. Bad news is my kernel is still 2.6.26. But it was not a problem before.
Very strange. zhenyu On Fri, Nov 13, 2009 at 4:16 PM, Jean-Daniel Cryans <[email protected]>wrote: > Looks like > http://pero.blogs.aprilmayjune.org/2009/01/22/hadoop-and-linux-kernel-2627-epoll-limits/ > > J-D > > On Fri, Nov 13, 2009 at 1:12 PM, Zhenyu Zhong <[email protected]> > wrote: > > Hi, > > > > > > After I re-organize the cluster, the experiment ran into problem faster > than > > before. > > > > Basically the changes are to use machines with less resources as > zookeeper > > quorums and machines with more resources as regionserver. > > > > From the log, I still see the pause around 1 minute. > > I enabled the GC logging, please see > > > > http://pastebin.com/m1d4ce0f1 > > > > for details. > > In general I don't see many pauses in the GC. > > > > What is more interesting, 1 hour after the 1st regionserver disconnected, > > the master log complained about too many open files. This didn't happen > > before. > > I checked the system OS setup as well as the limits.conf. I also checked > the > > running processes. The total open files don't reach the limit. I am > confused > > a bit. > > > > > > Please see the following master log. > > > > 2009-11-13 20:06:02,114 INFO org.apache.hadoop.hbase.master.BaseScanner: > > RegionManager.metaScanner scan of 4658 row(s) of meta region {server: > > 192.168.100.128:60021, regionname: .META.,,1, startKey: <>} complete > > 2009-11-13 20:06:02,114 INFO org.apache.hadoop.hbase.master.BaseScanner: > All > > 1 .META. region(s) scanned > > 2009-11-13 20:06:07,677 DEBUG org.apache.zookeeper.ClientCnxn: Got ping > > response for sessionid:0x424eebf1c10004c after 3ms > > 2009-11-13 20:06:08,178 INFO org.apache.hadoop.hdfs.DFSClient: Exception > in > > createBlockOutputStream java.io.IOException: Bad connect ack with > > firstBadLink 192.168.100.123:50010 > > 2009-11-13 20:06:08,178 INFO org.apache.hadoop.hdfs.DFSClient: Abandoning > > block blk_-2808245019291145247_5478039 > > 2009-11-13 20:06:09,682 INFO org.apache.hadoop.hdfs.DFSClient: Exception > in > > createBlockOutputStream java.io.EOFException > > 2009-11-13 20:06:09,682 INFO org.apache.hadoop.hdfs.DFSClient: Abandoning > > block blk_1074853606841896259_5478048 > > 2009-11-13 20:06:10,334 DEBUG org.apache.zookeeper.ClientCnxn: Got ping > > response for sessionid:0x24eebf1043003c after 1ms > > 2009-11-13 20:06:21,018 DEBUG org.apache.zookeeper.ClientCnxn: Got ping > > response for sessionid:0x424eebf1c10004c after 0ms > > 2009-11-13 20:06:23,674 DEBUG org.apache.zookeeper.ClientCnxn: Got ping > > response for sessionid:0x24eebf1043003c after 0ms > > 2009-11-13 20:06:24,828 INFO org.apache.hadoop.hdfs.DFSClient: Exception > in > > createBlockOutputStream java.io.IOException: Bad connect ack with > > firstBadLink 192.168.100.123:50010 > > 2009-11-13 20:06:24,828 INFO org.apache.hadoop.hdfs.DFSClient: Abandoning > > block blk_-6642544517082142289_5478063 > > 2009-11-13 20:06:24,828 INFO org.apache.hadoop.hdfs.DFSClient: Exception > in > > createBlockOutputStream java.net.SocketException: Too many open files > > 2009-11-13 20:06:24,828 INFO org.apache.hadoop.hdfs.DFSClient: Abandoning > > block blk_2057511041109796090_5478063 > > 2009-11-13 20:06:24,928 INFO org.apache.hadoop.hdfs.DFSClient: Exception > in > > createBlockOutputStream java.net.SocketException: Too many open files > > 2009-11-13 20:06:24,928 INFO org.apache.hadoop.hdfs.DFSClient: Abandoning > > block blk_8219260302213892894_5478064 > > 2009-11-13 20:06:30,855 INFO org.apache.hadoop.hdfs.DFSClient: Exception > in > > createBlockOutputStream java.net.SocketException: Too many open files > > 2009-11-13 20:06:30,855 INFO org.apache.hadoop.hdfs.DFSClient: Abandoning > > block blk_1669205542853067709_5478235 > > 2009-11-13 20:06:30,905 INFO org.apache.hadoop.hdfs.DFSClient: Exception > in > > createBlockOutputStream java.net.SocketException: Too many open files > > 2009-11-13 20:06:30,905 INFO org.apache.hadoop.hdfs.DFSClient: Abandoning > > block blk_9128897691346270351_5478237 > > 2009-11-13 20:06:30,955 INFO org.apache.hadoop.hdfs.DFSClient: Exception > in > > createBlockOutputStream java.net.SocketException: Too many open files > > 2009-11-13 20:06:30,955 INFO org.apache.hadoop.hdfs.DFSClient: Abandoning > > block blk_1116845144864123018_5478240 > > 2009-11-13 20:06:34,372 DEBUG org.apache.zookeeper.ClientCnxn: Got ping > > response for sessionid:0x424eebf1c10004c after 0ms > > 2009-11-13 20:06:37,034 DEBUG org.apache.zookeeper.ClientCnxn: Got ping > > response for sessionid:0x24eebf1043003c after 0ms > > 2009-11-13 20:06:37,235 WARN org.apache.hadoop.hdfs.DFSClient: > DataStreamer > > Exception: java.io.IOException: Too many open files > > at sun.nio.ch.IOUtil.initPipe(Native Method) > > at sun.nio.ch.EPollSelectorImpl.<init>(EPollSelectorImpl.java:49) > > at > > > sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:18) > > at > > > org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.get(SocketIOWithTimeout.java:407) > > at > > > org.apache.hadoop.net.SocketIOWithTimeout$SelectorPool.select(SocketIOWithTimeout.java:322) > > at > > > org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:157) > > at > > > org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:146) > > at > > > org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:107) > > at > java.io.BufferedOutputStream.write(BufferedOutputStream.java:105) > > at java.io.DataOutputStream.write(DataOutputStream.java:90) > > at > > > org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2290) > > > > 2009-11-13 20:06:37,235 WARN org.apache.hadoop.hdfs.DFSClient: Error > > Recovery for block blk_8148813491785406356_5478475 bad datanode[0] > > 192.168.100.123:50010 > > 2009-11-13 20:06:37,235 WARN org.apache.hadoop.hdfs.DFSClient: Error > > Recovery for block blk_8148813491785406356_5478475 in pipeline > > 192.168.100.123:50010, 192.168.100.134:50010, 192.168.100.122:50010: bad > > datanode 192.168.100.123:50010 > > 2009-11-13 20:06:37,436 INFO org.apache.hadoop.hdfs.DFSClient: Exception > in > > createBlockOutputStream java.net.SocketException: Too many open files > > 2009-11-13 20:06:37,436 INFO org.apache.hadoop.hdfs.DFSClient: Abandoning > > block blk_2119727700857186236_5478498 > > > > > > > > > > > > On Thu, Nov 12, 2009 at 4:21 PM, Zhenyu Zhong <[email protected] > >wrote: > > > >> Will do. > >> > >> thanks > >> zhenyu > >> > >> > >> On Thu, Nov 12, 2009 at 3:33 PM, stack <[email protected]> wrote: > >> > >>> Enable GC logging too on this next run (see hbase-env.sh). Lets try > and > >>> get > >>> to the bottom of whats going on. > >>> Thanks, > >>> St.Ack > >>> > >>> On Thu, Nov 12, 2009 at 12:29 PM, Zhenyu Zhong < > [email protected] > >>> >wrote: > >>> > >>> > I can switch the boxes that run zookeeper with the ones that run > >>> > regionservers. > >>> > I will see the results later. > >>> > > >>> > FYI. The node does have the 10 minutes zookeeper.session.timeout > value > >>> in > >>> > place. > >>> > > >>> > thanks > >>> > zhenyu > >>> > > >>> > On Thu, Nov 12, 2009 at 3:21 PM, stack <[email protected]> wrote: > >>> > > >>> > > On Thu, Nov 12, 2009 at 11:50 AM, Zhenyu Zhong < > >>> [email protected] > >>> > > >wrote: > >>> > > > >>> > > > > >>> > > > In my cluster, half of the cluster have 2 disks 400GB each per > >>> machine, > >>> > > and > >>> > > > half of the cluster have 6 disks per machine. Maybe we should > run > >>> > > > zookeeper > >>> > > > on the machines with 2 disks and RS on machines with 6 disks? > >>> > > > > >>> > > > That would make most sense only in the below, it looks like the > RS > >>> that > >>> > > had > >>> > > issue had 4 disks? > >>> > > > >>> > > > >>> > > > >>> > > > BTW, the 10 minutes zookeeper.session.timeout has been set during > >>> the > >>> > > > experiment. > >>> > > > > >>> > > > >>> > > And for sure this node had it in place? > >>> > > St.Ack > >>> > > > >>> > > > >>> > > > >>> > > > > >>> > > > thanks > >>> > > > zhenyu > >>> > > > > >>> > > > On Thu, Nov 12, 2009 at 2:08 PM, stack <[email protected]> wrote: > >>> > > > > >>> > > > > On Thu, Nov 12, 2009 at 8:40 AM, Zhenyu Zhong < > >>> > [email protected] > >>> > > > > >wrote: > >>> > > > > > >>> > > > > > >>> > > > > > 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 > >>> > > > > > > >>> > > > > > > >>> > > > > Is this high for you? 20k blocks/second would seem to be high > but > >>> > its > >>> > > > one > >>> > > > > disk only and its not being shared by zk anymore so shouldn't > >>> matter? > >>> > > > > > >>> > > > > > >>> > > > > > 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? > >>> > > > > > > >>> > > > > > > >>> > > > > Is that because the ephemeral node for the regionserver had > >>> > evaporated? > >>> > > > > Lost > >>> > > > > its lease w/ zk by the time you went to look? > >>> > > > > > >>> > > > > > >>> > > > > > >>> > > > > > >>> > > > > > 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 > >>> > > > > > > >>> > > > > > >>> > > > > > >>> > > > > That 6 second maximum latency is pretty bad but should be well > >>> within > >>> > > the > >>> > > > > zk > >>> > > > > session timeout. > >>> > > > > > >>> > > > > So, problem is likely on the zk client side of the session; > i.e. > >>> in > >>> > the > >>> > > > RS. > >>> > > > > You could enable GC logging as J-D suggested to see if you have > >>> any > >>> > big > >>> > > > > pauses, pauses > zk session timeout. > >>> > > > > > >>> > > > > When the RS went down, it didn't look too heavily loaded: > >>> > > > > > >>> > > > > > >>> > > > > 1. 2009-11-12 15:04:52,830 INFO > >>> > > > > org.apache.hadoop.hbase.regionserver.HRegionServer: Dump of > >>> > metrics: > >>> > > > > request=1.5166667, regions=322, stores=657, storefiles=631, > >>> > > > > storefileIndexSize=61, memstoreSize=1472, usedHeap=2819, > >>> > > maxHeap=4079, > >>> > > > > blockCacheSize=658110960, blockCacheFree=197395984, > >>> > > > blockCacheCount=9903, > >>> > > > > blockCacheHitRatio=99 > >>> > > > > > >>> > > > > Its serving a few reads? The number of store files seems fine. > >>> Not > >>> > > too > >>> > > > > much memory used. > >>> > > > > > >>> > > > > Looking at the logs, I see the Lease Still Held exception. > This > >>> > > happens > >>> > > > > when the RS does its regular report to the master but the > master > >>> > thinks > >>> > > > the > >>> > > > > RS has since restarted. It'll think this probably because it > >>> noticed > >>> > > > that > >>> > > > > the RS's znode in zk had gone away and it considered the RS > dead. > >>> > > > > > >>> > > > > Looking too at your logs I see this gap in the zk pinging: > >>> > > > > > >>> > > > > > >>> > > > > 1. 2009-11-12 15:03:39,325 DEBUG > >>> org.apache.zookeeper.ClientCnxn: > >>> > Got > >>> > > > > ping response for sessionid:0x224e55436ad0004 after 0ms > >>> > > > > 2. 2009-11-12 15:03:43,113 DEBUG > >>> org.apache.zookeeper.ClientCnxn: > >>> > Got > >>> > > > > ping response for sessionid:0x24e55436a0007d after 0ms > >>> > > > > > >>> > > > > Where in the lines above it, its reporting about every ten > >>> seconds, > >>> > > here > >>> > > > > there is a big gap. > >>> > > > > > >>> > > > > Do you have ganglia or something that will let you look more > into > >>> > what > >>> > > > was > >>> > > > > happening on this machine around this time? Is the machine OK? > >>> It > >>> > > looks > >>> > > > > lightly loaded and you have your cluster nicely laid out. > >>> Something > >>> > > odd > >>> > > > is > >>> > > > > going on. What about things like the write speed to disk? In > the > >>> > past > >>> > > > > strange issues have been explained by incorrectly set BIOS > which > >>> made > >>> > > > disks > >>> > > > > run at 1/100th of their proper speed. > >>> > > > > > >>> > > > > St.Ack > >>> > > > > > >>> > > > > > >>> > > > > > >>> > > > > > >>> > > > > > >>> > > > > > >>> > > > > > >>> > > > > > > >>> > > > > > Best, > >>> > > > > > zhenyu > >>> > > > > > > >>> > > > > > > >>> > > > > > On Wed, Nov 11, 2009 at 3:58 PM, Zhenyu Zhong < > >>> > > [email protected] > >>> > > > > > >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 <[email protected]> > >>> 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.selectionkeyi...@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 < > >>> > > > > [email protected] > >>> > > > > > >> >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 < > >>> > > > > > >> [email protected] > >>> > > > > > >> > >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 < > >>> > > > > > >> [email protected]> > >>> > > > > > >> > > 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 > < > >>> > > > > > >> > [email protected] > >>> > > > > > >> > > >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 < > >>> > > > > > >> > [email protected] > >>> > > > > > >> > > > > >>> > > > > > >> > > >> 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 > >>> < > >>> > > > > > >> > > [email protected] > >>> > > > > > >> > > >> >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 < > >>> > > > > > >> > > [email protected] > >>> > > > > > >> > > >> > > >>> > > > > > >> > > >> >> 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.selectionkeyi...@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 > >>> > < > >>> > > > > > >> > > >> [email protected] > >>> > > > > > >> > > >> >> >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 < > >>> > > > > > >> > > >> [email protected] > >>> > > > > > >> > > >> >> > > >>> > > > > > >> > > >> >> >> 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 > >>> < > >>> > > > > > >> > > >> >> [email protected] > >>> > > > > > >> > > >> >> >> >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) > >>> > > > > > >> > > >> >> >> >> > >>> > > > > > >> > > >> >> >> > > >>> > > > > > >> > > >> >> >> > >>> > > > > > >> > > >> >> > > >>> > > > > > >> > > >> >> > >>> > > > > > >> > > >> > > >>> > > > > > >> > > >> > >>> > > > > > >> > > > > >>> > > > > > >> > > > >>> > > > > > >> > > >>> > > > > > >> > >>> > > > > > > > >>> > > > > > > > >>> > > > > > > >>> > > > > > >>> > > > > >>> > > > >>> > > >>> > >> > >> > > >
