[HBASE-20701] too much logging when balancer runs from BaseLoadBalancer

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Fix Version/s: 1.3.3, 1.4.6
• Component/s: Balancer
• Labels: balancer
• Hadoop Flags: Reviewed
• Assignee: Mihir Monani
• Reporter: Mihir Monani
• Created: 07/Jun/18 14:11
• Updated: 22/Apr/19 21:14
• Resolved: 26/Jun/18 00:26

Description

When balancer runs, it tries to find least loaded server with better locality for current region. During this, we make debug level logging for each of those regions. It creates too much amount of logging at debug level , we should move this to trace level logging.

int getLeastLoadedTopServerForRegion (int region, int currentServer) {
...
    if (leastLoadedServerIndex != -1) {
        LOG.debug("Pick the least loaded server " + servers[leastLoadedServerIndex].getHostname()
        + " with better locality for region " + regions[region]);
    }
...
}

This was fixed in branch-2.0 as part of HBASE-14614