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Posted to dev@hbase.apache.org by "Jim Kellerman (JIRA)" <ji...@apache.org> on 2008/11/12 21:45:44 UTC
[jira] Resolved: (HBASE-602) HBase Crash when network card has a
IPv6 address
[ https://issues.apache.org/jira/browse/HBASE-602?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jim Kellerman resolved HBASE-602.
---------------------------------
Resolution: Fixed
Committed to branch and trunk.
> HBase Crash when network card has a IPv6 address
> ------------------------------------------------
>
> Key: HBASE-602
> URL: https://issues.apache.org/jira/browse/HBASE-602
> Project: Hadoop HBase
> Issue Type: Bug
> Components: master, regionserver
> Affects Versions: 0.1.1, 0.2.1, 0.18.1, 0.19.0
> Environment: Linux, java jdk 1.5
> Network Card Address:
> eth0 Link encap:Ethernet HWaddr 00:1E:C9:6B:2F:71
> inet addr:192.168.10.98 Bcast:192.168.10.255 Mask:255.255.255.0
> inet6 addr: fe80::21e:c9ff:fe6b:2f71/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:2061472 errors:0 dropped:0 overruns:0 frame:0
> TX packets:1936088 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:100
> RX bytes:493367388 (470.5 MB) TX bytes:160961988 (153.5 MB)
> Base address:0xfe00 Memory:fdfc0000-fdfe0000
> Reporter: Zhou Wei
> Assignee: Jim Kellerman
> Fix For: 0.19.0, 0.18.2
>
>
> 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.
> In order to avoid the problem,
> I modify a method in class: org.apache.hadoop.net.DNS
> The following is the modified code of this method, it would not return IPv6
> address now.
> /**
> * Returns all the IPs associated with the provided interface, if any, in
> * textual form.
> *
> * @param strInterface
> * The name of the network interface to query (e.g. eth0)
> * @return A string vector of all the IPs associated with the provided
> * interface
> * @throws UnknownHostException
> * If an UnknownHostException is encountered in querying the
> * default interface
> *
> */
> public static String[] getIPs(String strInterface)
> throws UnknownHostException {
> try {
> NetworkInterface netIF = NetworkInterface.getByName(strInterface);
> if (netIF == null)
> return new String[] { InetAddress.getLocalHost()
> .getHostAddress() };
> else {
> Vector<String> ips = new Vector<String>();
> Enumeration e = netIF.getInetAddresses();
> while (e.hasMoreElements())
> {
> String addr=((InetAddress) e.nextElement()).getHostAddress();
> if(addr.length()<=15)//only when it is a IPv4 address
> ips.add(addr);
> //ips.add(((InetAddress) e.nextElement()).getHostAddress());
> }
> return ips.toArray(new String[] {});
> }
> } catch (SocketException e) {
> return new String[] { InetAddress.getLocalHost().getHostAddress() };
> }
> }
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