Ok, thats what I was wondering. I started reading through the Hbase chapter in OReilly's Hadoop book.
All -- thank you for your help! I hope to do a short write up in a blog I just started. Hopefully this discussion will be helpful to other new users. On Wed, Nov 11, 2009 at 12:41 PM, Lars George <[email protected]> wrote: > Hi Chris, > > Please note that only one server gets to host the .META. table and another > the -ROOT- table. That is it. All user regions are then equally distributed > across all region servers. > > So it sounds like you are all set. Not sure what happened initially with > the Zookeeper hang up. Keep an eye on it. > > Lars > > > On Nov 11, 2009, at 15:12, Chris Bates <[email protected]> > wrote: > > @Lars -- We're configured like in the "Getting Started" guide -- tried to >> follow the instructions verbatim. >> >> Ok. Thanks for the tip. I'm not sure what causes the orphan behavior, but >> thats good to know. I'll also know what to look for in the jstack. After >> stopping the region servers individually, then doing a stop / restart, I >> get >> regionserver logs >> >> Here is M2 (chanel) >> Wed Nov 11 08:49:30 EST 2009 Starting regionserver on chanel >> ulimit -n 1024 >> 2009-11-11 08:49:32,081 INFO >> org.apache.hadoop.hbase.regionserver.HRegionServer: >> vmInputArguments=[-Xmx1000m, -XX:+HeapDumpOnOutOfMemoryError, >> -XX:+UseConcMarkSweepGC, -XX:+CMSIncrementalMode, -Dhbase.lo >> 2009-11-11 08:49:32,229 INFO >> org.apache.hadoop.hbase.regionserver.HRegionServer: My address is >> chanel.local:60020 >> 2009-11-11 08:49:32,418 INFO org.apache.hadoop.hbase.ipc.HBaseRpcMetrics: >> Initializing RPC Metrics with hostName=HRegionServer, port=60020 >> 2009-11-11 08:49:32,629 INFO >> org.apache.hadoop.hbase.regionserver.MemStoreFlusher: >> globalMemStoreLimit=398.7m, globalMemStoreLimitLowMark=249.2m, >> maxHeap=996.8m >> 2009-11-11 08:49:32,641 INFO >> org.apache.hadoop.hbase.regionserver.HRegionServer: Runs every 10000000ms >> 2009-11-11 08:49:32,749 INFO org.apache.zookeeper.ZooKeeper: Client >> environment:zookeeper.version=3.2.1-808558, built on 08/27/2009 18:48 GMT >> 2009-11-11 08:49:32,749 INFO org.apache.zookeeper.ZooKeeper: Client >> environment:host.name=chanel.local >> 2009-11-11 08:49:32,749 INFO org.apache.zookeeper.ZooKeeper: Client >> environment:java.version=1.6.0_16 >> 2009-11-11 08:49:32,749 INFO org.apache.zookeeper.ZooKeeper: Client >> environment:java.vendor=Sun Microsystems Inc. >> 2009-11-11 08:49:32,749 INFO org.apache.zookeeper.ZooKeeper: Client >> environment:java.home=/usr/lib/jvm/java-6-sun-1.6.0.16/jre >> 2009-11-11 08:49:32,749 INFO org.apache.zookeeper.ZooKeeper: Client >> >> environment:java.class.path=/opt/hadoop/hbase-0.20.1/bin/../conf:/usr/lib/jvm/java-6-sun/lib/tools.jar:/opt/hadoop/hbase-0.20.1/bin/..: >> 2009-11-11 08:49:32,749 INFO org.apache.zookeeper.ZooKeeper: Client >> >> environment:java.library.path=/opt/hadoop/hbase-0.20.1/bin/../lib/native/Linux-i386-32 >> 2009-11-11 08:49:32,749 INFO org.apache.zookeeper.ZooKeeper: Client >> environment:java.io.tmpdir=/tmp >> 2009-11-11 08:49:32,749 INFO org.apache.zookeeper.ZooKeeper: Client >> environment:java.compiler=<NA> >> 2009-11-11 08:49:32,749 INFO org.apache.zookeeper.ZooKeeper: Client >> environment:os.name=Linux >> 2009-11-11 08:49:32,750 INFO org.apache.zookeeper.ZooKeeper: Client >> environment:os.arch=i386 >> 2009-11-11 08:49:32,750 INFO org.apache.zookeeper.ZooKeeper: Client >> environment:os.version=2.6.24-24-generic >> 2009-11-11 08:49:32,750 INFO org.apache.zookeeper.ZooKeeper: Client >> environment:user.name=hadoop >> 2009-11-11 08:49:32,750 INFO org.apache.zookeeper.ZooKeeper: Client >> environment:user.home=/home/hadoop >> 2009-11-11 08:49:32,750 INFO org.apache.zookeeper.ZooKeeper: Client >> environment:user.dir=/opt/hadoop/hbase-0.20.1 >> 2009-11-11 08:49:32,760 INFO org.apache.zookeeper.ZooKeeper: Initiating >> client connection, >> >> connectString=crunch2:2181,chanel2:2181,chanel:2181,chris:2181,crunch3:2181 >> sessionTimeout=60000 watcher=org.apa >> 2009-11-11 08:49:32,781 INFO org.apache.zookeeper.ClientCnxn: >> zookeeper.disableAutoWatchReset is false >> 2009-11-11 08:49:32,800 INFO org.apache.zookeeper.ClientCnxn: Attempting >> connection to server crunch2/172.16.1.95:2181 >> 2009-11-11 08:49:32,802 INFO org.apache.zookeeper.ClientCnxn: Priming >> connection to java.nio.channels.SocketChannel[connected local=/ >> 172.16.1.45:33873 remote=crunch2/172.16.1.95:2181] >> 2009-11-11 08:49:32,814 INFO org.apache.zookeeper.ClientCnxn: Server >> connection successful >> 2009-11-11 08:49:32,829 INFO >> org.apache.hadoop.hbase.regionserver.HRegionServer: Got ZooKeeper event, >> state: SyncConnected, type: None, path: null >> 2009-11-11 08:49:32,973 INFO >> org.apache.hadoop.hbase.regionserver.HRegionServer: Telling master at >> 172.16.1.46:60000 that we are up >> 2009-11-11 08:49:33,509 INFO >> org.apache.hadoop.hbase.regionserver.HRegionServer: Master passed us >> address >> to use. Was=172.16.1.45:60020, Now=172.16.1.45 >> 2009-11-11 08:49:34,090 INFO org.apache.hadoop.hbase.regionserver.HLog: >> HLog >> configuration: blocksize=67108864, rollsize=63753420, enabled=true, >> flushlogentries=100, optionallogflushinternal=10000ms >> 2009-11-11 08:49:34,281 INFO org.apache.hadoop.hbase.regionserver.HLog: >> New >> hlog /hbase/.logs/chanel.local,60020,1257947373328/hlog.dat.1257947374090 >> 2009-11-11 08:49:34,319 INFO org.apache.hadoop.metrics.jvm.JvmMetrics: >> Initializing JVM Metrics with processName=RegionServer, >> sessionId=regionserver/172.16.1.45:60020 >> 2009-11-11 08:49:34,350 INFO >> org.apache.hadoop.hbase.regionserver.metrics.RegionServerMetrics: >> Initialized >> 2009-11-11 08:49:34,723 INFO org.apache.hadoop.http.HttpServer: Port >> returned by webServer.getConnectors()[0].getLocalPort() before open() is >> -1. >> Opening the listener on 60030 >> 2009-11-11 08:49:34,724 INFO org.apache.hadoop.http.HttpServer: >> listener.getLocalPort() returned 60030 >> webServer.getConnectors()[0].getLocalPort() returned 60030 >> 2009-11-11 08:49:34,724 INFO org.apache.hadoop.http.HttpServer: Jetty >> bound >> to port 60030 >> 2009-11-11 08:49:35,673 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server >> Responder: starting >> 2009-11-11 08:49:35,674 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server >> listener on 60020: starting >> 2009-11-11 08:49:35,675 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server >> handler 0 on 60020: starting >> 2009-11-11 08:49:35,675 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server >> handler 1 on 60020: starting >> 2009-11-11 08:49:35,675 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server >> handler 2 on 60020: starting >> 2009-11-11 08:49:35,675 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server >> handler 3 on 60020: starting >> 2009-11-11 08:49:35,676 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server >> handler 4 on 60020: starting >> 2009-11-11 08:49:35,676 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server >> handler 5 on 60020: starting >> 2009-11-11 08:49:35,676 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server >> handler 6 on 60020: starting >> 2009-11-11 08:49:35,676 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server >> handler 7 on 60020: starting >> 2009-11-11 08:49:35,676 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server >> handler 8 on 60020: starting >> 2009-11-11 08:49:35,676 INFO >> org.apache.hadoop.hbase.regionserver.HRegionServer: HRegionServer started >> at: 172.16.1.45:60020 >> 2009-11-11 08:49:35,677 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server >> handler 9 on 60020: starting >> 2009-11-11 08:49:35,694 INFO >> org.apache.hadoop.hbase.regionserver.StoreFile: >> Allocating LruBlockCache with maximum size 199.4m >> 2009-11-11 08:49:38,798 INFO >> org.apache.hadoop.hbase.regionserver.HRegionServer: MSG_REGION_OPEN: >> .META.,,1 >> 2009-11-11 08:49:38,811 INFO >> org.apache.hadoop.hbase.regionserver.HRegionServer: Worker: >> MSG_REGION_OPEN: >> .META.,,1 >> 2009-11-11 08:49:38,932 INFO org.apache.hadoop.hbase.regionserver.HRegion: >> region .META.,,1/1028785192 available; sequence id is 0 >> >> The only difference between that log file and the rest is that the others >> don't have >> 2009-11-11 08:49:38,798 INFO >> org.apache.hadoop.hbase.regionserver.HRegionServer: MSG_REGION_OPEN: >> .META.,,1 >> 2009-11-11 08:49:38,811 INFO >> org.apache.hadoop.hbase.regionserver.HRegionServer: Worker: >> MSG_REGION_OPEN: >> .META.,,1 >> 2009-11-11 08:49:38,932 INFO org.apache.hadoop.hbase.regionserver.HRegion: >> region .META.,,1/1028785192 available; sequence id is 0 >> >> except M5 which has it and says id is 3....if you want me to paste all the >> logs, I can...didn't think it was necessary. >> >> hbase(main):001:0> zk_dump >> >> HBase tree in ZooKeeper is rooted at /hbase >> Cluster up? true >> In safe mode? false >> Master address: 172.16.1.46:60000 >> Region server holding ROOT: 172.16.1.96:60020 >> Region servers: >> - 172.16.1.95:60020 >> - 172.16.1.96:60020 >> - 172.16.1.83:60020 >> - 172.16.1.45:60020 >> hbase(main):002:0> status 'simple' >> 4 live servers >> crunch3.local:60020 1257928281006 >> requests=0, regions=1, usedHeap=31, maxHeap=998 >> chris.local:60020 1257947367197 >> requests=0, regions=0, usedHeap=29, maxHeap=996 >> crunch2.local:60020 1257947370011 >> requests=0, regions=0, usedHeap=29, maxHeap=998 >> chanel.local:60020 1257947373328 >> requests=0, regions=1, usedHeap=31, maxHeap=996 >> 0 dead servers >> >> >> I started and stopped Hbase a couple times without deleting the HDFS copy, >> and everything seems to work fine....was that it??? What caused the >> regionservers to orphan? >> >> On Wed, Nov 11, 2009 at 5:17 AM, Lars George <[email protected]> wrote: >> >> Hi Chris, >>> >>> As Tatsuya says, but I would expect you have to "kill" them as they are >>> in >>> a state where a daemon stop may not work as they will not be perceptible >>> to >>> that event yet. >>> >>> I saw the same as Tatsuya and assumed you have an issue with your quorum >>> setting on the slaves. I have not followed the whole discussion in all >>> the >>> details so let me ask you how you configured it? >>> >>> I have personally done a symlink of my standalone zoo.cfg from the >>> zookeeper/conf to the hbase/conf directory. You could also have set the >>> quorum servers in the hbase-site.xml as per the "Getting started" guide. >>> >>> If you have done one of those ways already then make sure all ZK servers >>> are up and can be reached from the region servers. >>> >>> Lars >>> >>> Tatsuya Kawano schrieb: >>> >>> Hi Chris, and thanks Lars for help. >>> >>>> >>>> OK. So "jstack 22200" shows your region server is trying to finish >>>> starting up, but stuck in a middle when try to get IP address of the >>>> master from ZooKeeper. >>>> >>>> =========================================================== >>>> "main" prio=10 tid=0x0805a800 nid=0x56d2 waiting on condition >>>> [0xb72f2000] >>>> java.lang.Thread.State: TIMED_WAITING (sleeping) >>>> at java.lang.Thread.sleep(Native Method) >>>> at org.apache.hadoop.hbase.util.Sleeper.sleep(Sleeper.java:74) >>>> at org.apache.hadoop.hbase.util.Sleeper.sleep(Sleeper.java:51) >>>> at >>>> >>>> >>>> org.apache.hadoop.hbase.regionserver.HRegionServer.watchMasterAddress(HRegionServer.java:387) >>>> at >>>> >>>> >>>> org.apache.hadoop.hbase.regionserver.HRegionServer.reinitializeZooKeeper(HRegionServer.java:315) >>>> at >>>> >>>> >>>> org.apache.hadoop.hbase.regionserver.HRegionServer.reinitialize(HRegionServer.java:306) >>>> at >>>> >>>> >>>> org.apache.hadoop.hbase.regionserver.HRegionServer.<init>(HRegionServer.java:276) >>>> =========================================================== >>>> >>>> I still need to see the regionserver logs to figure out why this is >>>> happening. >>>> >>>> >>>> Also, >>>> >>>> >>>> >>>> This is what I see when I run start-hbase.sh -- I can ssh into any of >>>>> the >>>>> boxes with no password just fine, it just gives me a weird first time >>>>> host >>>>> message...we get the same thing when we start up hadoop. >>>>> >>>>> >>>>> ... >>>> >>>> >>>> crunch2: regionserver running as process 6950. Stop it first. >>>>> chanel: regionserver running as process 22200. Stop it first. >>>>> crunch3: regionserver running as process 28962. Stop it first. >>>>> chris: regionserver running as process 28719. Stop it first. >>>>> >>>>> >>>>> >>>> This "Stop it first" message means your region servers didn't stop >>>> when you ran stop-hbase.sh. The master couldn't locate those region >>>> servers so it couldn't tell them to shutdown. This is why you've got >>>> those orphan region servers. So until we finish setting your HBase >>>> cluster up, you'll have to stop those region servers by hand. >>>> >>>> To do this, ssh to M2 -- M5, and type the following command: >>>> ${HBASE_HOME}/bin/hbase-daemon.sh stop regionserver >>>> >>>> Then jps again to make sure HRegionServer doesn't exist. If the above >>>> command doesn't work, you can use Unix "kill" command. Then ssh to M1, >>>> run stop-hbase.sh to stop the master and ZooKeepers. >>>> >>>> >>>> It's still a mystery you don't have regionserver logs while you have >>>> zookeeper logs. Maybe those orphan region servers was the reason? I >>>> don't know, but you can give it another try after stopping them. So, >>>> try to stop whole HBase / ZooKeeper process by above way, then run >>>> start-hbase.sh once again. If you can get the regionserver log to us, >>>> that would be great. >>>> >>>> Thanks, >>>> >>>> >>>> >>>> >>>
