Sean Bridges created ZOOKEEPER-1652:
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Summary: zookeeper java client does a reverse dns lookup when
connecting
Key: ZOOKEEPER-1652
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1652
Project: ZooKeeper
Issue Type: Bug
Components: java client
Affects Versions: 3.4.5
Reporter: Sean Bridges
Priority: Critical
When connecting to zookeeper, the client does a reverse dns lookup on the
hostname. In our environment, the reverse dns lookup takes 5 seconds to fail,
causing zookeeper clients to connect slowly.
The reverse dns lookup occurs in ClientCnx in the calls to adr.getHostName()
{code}
setName(getName().replaceAll("\\(.*\\)",
"(" + addr.getHostName() + ":" + addr.getPort() + ")"));
try {
zooKeeperSaslClient = new
ZooKeeperSaslClient("zookeeper/"+addr.getHostName());
} catch (LoginException e) {
{code}
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