[HBASE-21610] numOpenConnections metric is set to -1 when zero server channel exist

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.1.1, 2.0.3
• Fix Version/s: 3.0.0-alpha-1, 2.2.0, 2.1.2, 2.0.4
• Component/s: metrics
• Hadoop Flags: Reviewed
• Assignee: Pankaj Kumar
• Reporter: Pankaj Kumar
• Created: 17/Dec/18 19:58
• Updated: 19/Sep/22 12:55
• Resolved: 21/Dec/18 00:38

Description

In NettyRpcServer, numOpenConnections metric is set to -1 when zero server channel exist.

@Override
 public int getNumOpenConnections() {
 // allChannels also contains the server channel, so exclude that from the count.
 return allChannels.size() - 1;
 }

 

 We should not decrease the channel size by 1 when zero server channel exist.