I am using the curator framework to connect to a zookeeper server, but running into weird DNS resolution issue. Here is the jstack dump for the thread,
#21 prio=5 os_prio=0 tid=0x0000000001888800 nid=0x3a46 runnable [0x00007f25e69f3000]
java.lang.Thread.State: RUNNABLE
at java.net.Inet4AddressImpl.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.resolveAndShuffle(StaticHostProvider.java:117)
at org.apache.zookeeper.client.StaticHostProvider.<init>(StaticHostProvider.java:81)
at org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:1096)
at org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:1006)
at org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:804)
at org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:679)
at com.netflix.curator.HandleHolder$1.getZooKeeper(HandleHolder.java:72)
- locked <0x00000000fd761f40> (a com.netflix.curator.HandleHolder$1)
at com.netflix.curator.HandleHolder.getZooKeeper(HandleHolder.java:46)
at com.netflix.curator.ConnectionState.reset(ConnectionState.java:122)
at com.netflix.curator.ConnectionState.start(ConnectionState.java:95)
at com.netflix.curator.CuratorZookeeperClient.start(CuratorZookeeperClient.java:137)
at com.netflix.curator.framework.imps.CuratorFrameworkImpl.start(CuratorFrameworkImpl.java:167)
The thread seems to be stuck in the native method and never returns. Also it occurs very randomly, so haven't been able to reproduce consistently. Any ideas?