When I start the hbase first time I always see following error. ERROR: java.lang.reflect.UndeclaredThrowableException: Call to 192.168.1.120/192.168.1.120:49188 failed on local exception: java.io.EOFException
but my log file shows 2011-10-21 15:45:21,772 ERROR org.apache.hadoop.hbase.HServerAddress: Could not resolve the DNS name of unknowne4ce8f3898fc 2011-10-21 15:45:21,773 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting shutdown. java.lang.IllegalArgumentException: hostname can't be null How to debug this. Even by searching in the old email it says there was a bug in 0.90 which is fixed. I am not able to get anything more. -Jignesh On Fri, Oct 21, 2011 at 1:58 PM, Jignesh Patel <[email protected]>wrote: > I have clean up the zookeeper and it seems my computer name is also changed > today as setting of dynamic ip. > > Jignesh-MacBookPro:hadoop hadoop-user$ hostname > Jignesh-MacBookPro.local > > But I still have old error > > Could not resolve the DNS name of *unknowne4ce8f3898fc* > > Why would HServerAddress get old name, instead of taking the latest one. > > According to the following article, it advise us to refrain from adding > hardcoded name as hadoop is efficient to pickup the appropriate DNS name. > > http://wiki.datameer.com/display/DAS1/Hadoop+Cluster+Configuration+Tips > > On Thu, Oct 20, 2011 at 7:43 PM, Shrijeet Paliwal <[email protected] > > wrote: > >> Look for a DNS /etc/hosts related suggestion mentioned here : >> http://search-hadoop.com/m/N45fnRFrG12 >> also here >> http://ria101.wordpress.com/2010/01/28/setup-hbase-in-pseudo-distributed-mode-and-connect-java-client/ >> Also clean up data from zookeeper if needed and do a restart of >> services , zookkper directory is here usually : >> ${hbase.tmp.dir}/zookeeper >> >> >> PS: This issues has been reported bunch of times. Look deeper in >> mailing archives for changes required in /etc/hosts to get standalone >> hbase running. >> >> On Thu, Oct 20, 2011 at 2:24 PM, Jignesh Patel <[email protected]> >> wrote: >> > >> > Shrijeet >> > I have tried to take help from Mac group and their respond. >> > >> > "An app you wrote, or somebody else's app? >> > I'm not sure exactly how you want us to help, unknowne4ce8f3898fc is >> indeed >> > an invalid hostname." >> > >> > According to them it seems this is a app problem, but I haven' changed >> > anything and my zookeeper recognizes the IP. >> > >> > 2011-10-20 14:19:04,736 DEBUG >> org.apache.hadoop.hbase.zookeeper.ZKAssign: >> > master:49232-0x133228e8a8f0000 Successfully deleted unassigned node for >> > region 70236052 in expected state RS_ZK_REGION_OPENED >> > 2011-10-20 14:19:04,737 DEBUG >> > org.apache.hadoop.hbase.master.handler.OpenedRegionHandler: Opened >> region >> > -ROOT-,,0.70236052 on 1*92.168.1.120*,49235,1319134727150 >> > 2011-10-20 14:19:04,846 ERROR org.apache.hadoop.hbase.HServerAddress: >> Could >> > not resolve the DNS name of *unknowne4ce8f3898fc* >> > 2011-10-20 14:19:04,847 FATAL org.apache.hadoop.hbase.master.HMaster: >> > Unhandled exception. Starting shutdown. >> > java.lang.IllegalArgumentException: hostname can't be null >> > >> > So while I am researching with them, I post their response so that if >> > somebody encounter same problem can direct me. >> > >> > -Jignesh >> > On Thu, Oct 20, 2011 at 2:54 PM, Shrijeet Paliwal >> > <[email protected]>wrote: >> > >> > > Jignesh, >> > > This >> > > >> > > >> http://search-hadoop.com/?q=hbase+dns&fc_project=HBase&fc_type=mail+_hash_+user >> > > and >> > > this >> > > http://www.plus.net/support/software/dns/changing_dns_mac.shtml >> > > >> > > As Stack pointed out in other thread , you can find mac OS communities >> more >> > > helpful for some of your how-toes. >> > > >> > > -Shrijeet >> > > >> > > On Thu, Oct 20, 2011 at 11:47 AM, Jignesh Patel < >> [email protected] >> > > >wrote: >> > > >> > > > Thanks Stack, >> > > > >> > > > Is there any link I can refer for that? I am using Lion OS x. Google >> > > > doesn't >> > > > help me much for this. >> > > > >> > > > -Jignesh >> > > > >> > > > On Thu, Oct 20, 2011 at 12:05 PM, Stack <[email protected]> wrote: >> > > > >> > > > > Fix your DNS, name resolving. >> > > > > St.Ack >> > > > > >> > > > > On Thu, Oct 20, 2011 at 9:02 AM, Jignesh Patel < >> > > [email protected]> >> > > > > wrote: >> > > > > > Hbase was working till yesterday but I am seeing following error >> > > today. >> > > > > > >> > > > > > 2011-10-20 11:52:02,329 ERROR >> org.apache.hadoop.hbase.HServerAddress: >> > > > > Could >> > > > > > not resolve the DNS name of unknowne4ce8f3898fc >> > > > > > 2011-10-20 11:52:02,329 FATAL >> org.apache.hadoop.hbase.master.HMaster: >> > > > > > Unhandled exception. Starting shutdown. >> > > > > > java.lang.IllegalArgumentException: hostname can't be null >> > > > > > at java.net.InetSocketAddress.<init>(InetSocketAddress.java:121) >> > > > > > at >> > > > > > >> > > > > >> > > > >> > > >> org.apache.hadoop.hbase.HServerAddress.getResolvedAddress(HServerAddress.java:108) >> > > > > > at >> > > > >> org.apache.hadoop.hbase.HServerAddress.<init>(HServerAddress.java:64) >> > > > > > at >> > > > > > >> > > > > >> > > > >> > > >> org.apache.hadoop.hbase.catalog.MetaReader.readLocation(MetaReader.java:339) >> > > > > > at >> > > > > > >> > > > > >> > > > >> > > >> org.apache.hadoop.hbase.catalog.MetaReader.readMetaLocation(MetaReader.java:281) >> > > > > > at >> > > > > > >> > > > > >> > > > >> > > >> org.apache.hadoop.hbase.catalog.CatalogTracker.getMetaServerConnection(CatalogTracker.java:282) >> > > > > > at >> > > > > > >> > > > > >> > > > >> > > >> org.apache.hadoop.hbase.catalog.CatalogTracker.verifyMetaRegionLocation(CatalogTracker.java:488) >> > > > > > at >> > > > > > >> > > > > >> > > > >> > > >> org.apache.hadoop.hbase.master.HMaster.assignRootAndMeta(HMaster.java:441) >> > > > > > at >> > > > > > >> > > > > >> > > > >> > > >> org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:388) >> > > > > > at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:282) >> > > > > > at >> > > > > > >> > > > > >> > > > >> > > >> org.apache.hadoop.hbase.master.HMasterCommandLine$LocalHMaster.run(HMasterCommandLine.java:193) >> > > > > > at java.lang.Thread.run(Thread.java:680) >> > > > > > >> > > > > >> > > > >> > > >> > >
