Make zk dump jsp response more quickly
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Key: HBASE-4568
URL: https://issues.apache.org/jira/browse/HBASE-4568
Project: HBase
Issue Type: Improvement
Reporter: Liyin Tang
Assignee: Liyin Tang
For each zk dump, currently hbase will create a zk client instance every time.
This is quite slow when any machines in the quorum is dead. Because it will
connect to each machine in the zk quorum again.
HMaster master = (HMaster)getServletContext().getAttribute(HMaster.MASTER);
Configuration conf = master.getConfiguration();
HBaseAdmin hbadmin = new HBaseAdmin(conf);
HConnection connection = hbadmin.getConnection();
ZooKeeperWatcher watcher = connection.getZooKeeperWatcher();
So we can simplify this:
HMaster master = (HMaster)getServletContext().getAttribute(HMaster.MASTER);
ZooKeeperWatcher watcher = master.getZooKeeperWatcher();
Also when hbase call getServerStats() for each machine in the zk quorum, it
hard coded the default time out as 1 min.
It would be nice to make this configurable and set it to a low time out.
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