byon cluster with hostnames defined in /etc/hosts
-------------------------------------------------
Key: WHIRR-338
URL: https://issues.apache.org/jira/browse/WHIRR-338
Project: Whirr
Issue Type: Improvement
Components: core
Reporter: Bruno Dumon
Attachments: WHIRR-338.patch
Basically the subject combined with the single-line patch should make it clear,
what follows is the long story.
I am unable to get HBase to work when using BYON nodes due to the following
error:
{noformat}
2011-07-14 14:46:07,837 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled
exception. Starting shutdown.
java.lang.IllegalArgumentException: Wrong FS: hdfs://192.168.56.11:8020/hbase,
expected: hdfs://ubuntutest2
at org.apache.hadoop.fs.FileSystem.checkPath(FileSystem.java:410)
at
org.apache.hadoop.hdfs.DistributedFileSystem.checkPath(DistributedFileSystem.java:106)
{noformat}
The situation is I'm using two VirtualBox instances whose hostnames I defined
manually through /etc/hosts
In the byon yaml file, I specify the host by IP address:
{noformat}
- id: ubuntutest2
hostname: 192.168.56.11
{noformat}
When specifying the hostname instead, I get an error when starting Whirr:
invalid IP address: ubuntutest2
This message is produced in the constructor of Cluster.Instance, earlier Whirr
got the address by calling NodeMetadata.getPublicAddresses(), so jclouds
returns there a hostname rather than an address (which might be considered a
bug in jclouds, but even if it returned an ip address, the problem described
next stays true).
Back to the case where I specify the IP address in the byon yaml:
The address in the hdfs URL is determined in HBaseMasterClusterActionHandler
and comes down to:
instance.getPublicAddress().getHostName()
which is determined by xbill/dnsjava (see DnsUtil), which does not make use of
/etc/hosts.
As fix (see attached patch), I propose to fall back to Java's
getCanonicalHostName() in case dnsjava did not return any results.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
