[TINKERPOP-2740] first request suspend more than 9s when using gremlin-java-driver

• Type: Improvement
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 3.4.3, 3.6.0, 3.5.3
• Fix Version/s: 3.6.1, 3.5.4
• Component/s: driver
• Assignee: Lyndon Bauto
• Reporter: Stark Arya
• Created: 06/May/22 13:01
• Updated: 07/Jun/22 23:21
• Resolved: 07/Jun/22 23:21

Description

when user use gremlin-driver in private cloud environment, 

In AUTHENTICATE rsp func, client need reverse name lookup  through DNS, which will take more than 9s in certain env;  the calling code slice:

 

Handler.GremlinSaslAuthenticationHandler.channelRead0       
 saslClient.set(this.saslClient(this.getHostName(channelHandlerContext)));
  
private String getHostName(final ChannelHandlerContext channelHandlerContext) {
return((InetSocketAddress)channelHandlerContext.channel().remoteAddress()).getAddress().getCanonicalHostName();
}

there are many talks about this talks about this question.

https://www.thecodingforums.com/threads/very-slow-ssl-connection-from-win-to-linux.147274/#post-2959030

https://stackoverflow.com/questions/3193936/how-to-disable-javas-ssl-reverse-dns-lookup

 

I think we can rewrite the getHostName like this(use getHostAddress):

private String getHostName(final ChannelHandlerContext channelHandlerContext)  {
    return ((InetSocketAddress)channelHandlerContext.channel().remoteAddress()).getAddress().getHostAddress();
} 

all versions seed affected