Unable to determine local hostname falling back to "localhost"
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YK
Nov 23, 2014, 10:56:54 AM11/23/14
to aureliu...@googlegroups.com
Hi,
I got the following error when I try to connect titan.
I have Hadoop cluster - CDH 5.1.2 installing in different servers.
I download titan to another new server (called titan) and the /etc/hosts contain: (default OS installation)
[root@titan ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
What should I need to check?
It seems that the problem is the HBASE side
[cel@titan conf]$ ~/Titan/titan-0.5.1-hadoop2/bin/gremlin.sh
\,,,/
(o o)
-----oOOo-(_)-oOOo-----
17:22:59 WARN org.apache.hadoop.util.NativeCodeLoader - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
gremlin> g = TitanFactory.open('/home/cel/Titan/conf/hbase_titan.conf')
17:23:09 WARN org.apache.hadoop.net.DNS - Unable to determine local hostname -falling back to "localhost"
java.net.UnknownHostException: titan: titan: Name or service not known
at java.net.InetAddress.getLocalHost(InetAddress.java:1473)
at org.apache.hadoop.net.DNS.resolveLocalHostname(DNS.java:264)
at org.apache.hadoop.net.DNS.<clinit>(DNS.java:57)
at org.apache.hadoop.hbase.client.ScannerCallable.<clinit>(ScannerCallable.java:75)
at org.apache.hadoop.hbase.client.ClientScanner.getScannerCallable(ClientScanner.java:280)
at org.apache.hadoop.hbase.client.ClientScanner.nextScanner(ClientScanner.java:261)
at org.apache.hadoop.hbase.client.ClientScanner.initializeScannerInConstruction(ClientScanner.java:169)
at org.apache.hadoop.hbase.client.ClientScanner.<init>(ClientScanner.java:164)
at org.apache.hadoop.hbase.client.ClientScanner.<init>(ClientScanner.java:107)
at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:736)
at org.apache.hadoop.hbase.catalog.MetaReader.fullScan(MetaReader.java:539)
at org.apache.hadoop.hbase.catalog.MetaReader.tableExists(MetaReader.java:310)
at org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:279)
at org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:293)
at com.thinkaurelius.titan.diskstorage.hbase.HBaseStoreManager.ensureTableExists(HBaseStoreManager.java:748)
at com.thinkaurelius.titan.diskstorage.hbase.HBaseStoreManager.getLocalKeyPartition(HBaseStoreManager.java:551)
at com.thinkaurelius.titan.diskstorage.hbase.HBaseStoreManager.getDeployment(HBaseStoreManager.java:348)
at com.thinkaurelius.titan.diskstorage.hbase.HBaseStoreManager.getFeatures(HBaseStoreManager.java:390)
at com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration.<init>(GraphDatabaseConfiguration.java:1251)
at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:91)
at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:60)
at com.thinkaurelius.titan.core.TitanFactory$open.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
at groovysh_evaluate.run(groovysh_evaluate:82)
at groovysh_evaluate$run.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
at groovysh_evaluate$run.call(Unknown Source)
at org.codehaus.groovy.tools.shell.Interpreter.evaluate(Interpreter.groovy:67)
at org.codehaus.groovy.tools.shell.Interpreter$evaluate.call(Unknown Source)
at org.codehaus.groovy.tools.shell.Groovysh.execute(Groovysh.groovy:152)
at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:114)
at org.codehaus.groovy.tools.shell.Shell$leftShift$0.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:88)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$work(InteractiveShellRunner.groovy)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1079)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:128)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:148)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.work(InteractiveShellRunner.groovy:100)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:272)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:137)
at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:57)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$run(InteractiveShellRunner.groovy)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1079)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:128)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:148)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.run(InteractiveShellRunner.groovy:66)
at com.thinkaurelius.titan.hadoop.tinkerpop.gremlin.Console.<init>(Console.java:61)
at com.thinkaurelius.titan.hadoop.tinkerpop.gremlin.Console.<init>(Console.java:70)
at com.thinkaurelius.titan.hadoop.tinkerpop.gremlin.Console.main(Console.java:75)
Caused by: java.net.UnknownHostException: titan: Name or service not known
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
at java.net.InetAddress.getLocalHost(InetAddress.java:1469)
... 72 more
17:23:10 WARN org.apache.hadoop.net.DNS - Unable to determine address of the host-falling back to "localhost" address
java.net.UnknownHostException: titan: titan: Name or service not known
at java.net.InetAddress.getLocalHost(InetAddress.java:1473)
at org.apache.hadoop.net.DNS.resolveLocalHostIPAddress(DNS.java:287)
at org.apache.hadoop.net.DNS.<clinit>(DNS.java:58)
at org.apache.hadoop.hbase.client.ScannerCallable.<clinit>(ScannerCallable.java:75)
at org.apache.hadoop.hbase.client.ClientScanner.getScannerCallable(ClientScanner.java:280)
at org.apache.hadoop.hbase.client.ClientScanner.nextScanner(ClientScanner.java:261)
at org.apache.hadoop.hbase.client.ClientScanner.initializeScannerInConstruction(ClientScanner.java:169)
at org.apache.hadoop.hbase.client.ClientScanner.<init>(ClientScanner.java:164)
at org.apache.hadoop.hbase.client.ClientScanner.<init>(ClientScanner.java:107)
at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:736)
at org.apache.hadoop.hbase.catalog.MetaReader.fullScan(MetaReader.java:539)
at org.apache.hadoop.hbase.catalog.MetaReader.tableExists(MetaReader.java:310)
at org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:279)
at org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:293)
at com.thinkaurelius.titan.diskstorage.hbase.HBaseStoreManager.ensureTableExists(HBaseStoreManager.java:748)
at com.thinkaurelius.titan.diskstorage.hbase.HBaseStoreManager.getLocalKeyPartition(HBaseStoreManager.java:551)
at com.thinkaurelius.titan.diskstorage.hbase.HBaseStoreManager.getDeployment(HBaseStoreManager.java:348)
at com.thinkaurelius.titan.diskstorage.hbase.HBaseStoreManager.getFeatures(HBaseStoreManager.java:390)
at com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration.<init>(GraphDatabaseConfiguration.java:1251)
at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:91)
at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:60)
at com.thinkaurelius.titan.core.TitanFactory$open.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
at groovysh_evaluate.run(groovysh_evaluate:82)
at groovysh_evaluate$run.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
at groovysh_evaluate$run.call(Unknown Source)
at org.codehaus.groovy.tools.shell.Interpreter.evaluate(Interpreter.groovy:67)
at org.codehaus.groovy.tools.shell.Interpreter$evaluate.call(Unknown Source)
at org.codehaus.groovy.tools.shell.Groovysh.execute(Groovysh.groovy:152)
at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:114)
at org.codehaus.groovy.tools.shell.Shell$leftShift$0.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:88)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$work(InteractiveShellRunner.groovy)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1079)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:128)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:148)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.work(InteractiveShellRunner.groovy:100)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:272)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:46)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:137)
at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:57)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$run(InteractiveShellRunner.groovy)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1079)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:128)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:148)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.run(InteractiveShellRunner.groovy:66)
at com.thinkaurelius.titan.hadoop.tinkerpop.gremlin.Console.<init>(Console.java:61)
at com.thinkaurelius.titan.hadoop.tinkerpop.gremlin.Console.<init>(Console.java:70)
at com.thinkaurelius.titan.hadoop.tinkerpop.gremlin.Console.main(Console.java:75)
Caused by: java.net.UnknownHostException: titan: Name or service not known
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
at java.net.InetAddress.getLocalHost(InetAddress.java:1469)
... 72 more
Daniel Kuppitz
Nov 23, 2014, 5:52:17 PM11/23/14
to aureliu...@googlegroups.com
If the host name titan is not known, why don't you just try to add an entry for titan in /etc/hosts? I guess that's all what's needed to solve this issue.
Cheers,
Daniel
YK
Nov 24, 2014, 2:18:23 AM11/24/14
to aureliu...@googlegroups.com
Hi,
Believe me I did it and add a record in the etc/hosts files of the Hbase servers like that
192.168.2.52 titan
also add this record to the /etc/hosts of the titan server
but with no success.
when the titan server /etc/hosts looks like that
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.2.52 titan
OR like that (disable first row) OR disabling the 2 first rows
#127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.2.52 titan
g = TitanFactory.open('/home/celare/Titan/conf/hbase_titan.conf') hangs forever and no error appeared but no connection
Any suggestion is welcomed
If it's matter, the hbase_titan.conf content is:
storage.backend=hbase
#storage.hostname=192.168.2.3,192.168.2.2,192.168.2.1
storage.hostname=10.5.1.160,10.5.1.161,10.5.1.162
#storage.port=2181
storage.hbase.table=myTitan
cache.db-cache = true
#cache.db-cache-clean-wait = 20
cache.db-cache-time = 180000
cache.db-cache-size = 0.3
schema.default=none
Thanks
YK
Nov 25, 2014, 5:07:53 PM11/25/14
to aureliu...@googlegroups.com
Hi,
The solution was to define the servers name in the DNS server.
Definition in /etc/hosts was no sufficient.
YK
On Sunday, November 23, 2014 5:56:54 PM UTC+2, YK wrote:
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