[GIRAPH-1099] Bypass all DNC calls in Giraph

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Assignee: Sergey Edunov
• Reporter: Sergey Edunov
• Created: 27/Jul/16 17:55
• Updated: 12/May/20 23:55
• Resolved: 12/May/20 23:55

Description

After GIRAPH-1034 we have reduced the number of DNS lookups and reverse DNS lookups dramatically. However, we still see failures occasionally and it would be great to completely bypass DNS if PREFER_IP_ADDRESSES is set.

Currently I'm aware of two places that make DNS lookups:

One in BspService:
this.hostname = conf.getLocalHostname();

Another one is probably related:
java.net.UnknownHostException: ***.com: unknown error
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
at java.net.InetAddress.getAllByName0(InetAddress.java:1276)
at java.net.InetAddress.getAllByName(InetAddress.java:1192)
at java.net.InetAddress.getAllByName(InetAddress.java:1126)
at org.apache.zookeeper.client.StaticHostProvider.<init>(StaticHostProvider.java:60)
at org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:445)
at org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:380)
at org.apache.giraph.zk.ZooKeeperExt.<init>(ZooKeeperExt.java:114)
at org.apache.giraph.bsp.BspService.<init>(BspService.java:281)