Zhou,
Can you create an issue and post a patch of the changes you made?
-Bryan
On Apr 28, 2008, at 9:42 AM, Zhou wrote:
Hi,
I've met a problem startup HBase.
I setup hbase with hdfs,
My server's network card has a ipv4 address and also a ipv6 address.
When I first startup hbase with default configuration file,
I found that the region server can't
register to master. And I found lots of 127.0.0.1 in log.
So I suppose interface "default" would not work and add following:
<property>
<name>dfs.datanode.dns.interface</name>
<value>eth0</value>
<description>The name of the Network Interface from which a data
node should
report its IP address.
</description>
</property>
However, when this is done. HBase master crashes;
And I see ipv6 addresses in the log.
So I dig into the source code,
found that HBase fails to deal with IPv6 address.
Details is in following:
In class org.apache.hadoop.hbase.HRegionServer
the method getThisIP() invoke the method of class belongs to Hadoop-
core package
The class is: org.apache.hadoop.net.DNS
the method is: getDefaultIP(String strInterface)
This method invokes another method in the same class: getIPs(String
strInterface)
Method getIPs always returns the first ip address no matter it is
ipv4 or ipv6
I have fixed it by modifying method of
org.apache.hadoop.net.DNS.getIPs(String
strInterface)
Such that it always returns ipv4 address
It is working now for me.
But when hadoop upgrades, I have to modify again.
I hope that HBase can fix this problem.
Many thanks,
Zhou
