Jing Zhao created HADOOP-10441:
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             Summary: Namenode metric 
"rpc.RetryCache/NameNodeRetryCache.CacheHit" can't be correctly processed by 
Ganglia
                 Key: HADOOP-10441
                 URL: https://issues.apache.org/jira/browse/HADOOP-10441
             Project: Hadoop Common
          Issue Type: Bug
    Affects Versions: 2.4.0
            Reporter: Jing Zhao
            Assignee: Jing Zhao
            Priority: Minor


The issue is reported by [~dsen]:

Recently added Namenode metric "rpc.RetryCache/NameNodeRetryCache.CacheHit" 
can't be correctly processed by Ganglia because its name contains "/"

Proposal: Namenode metric "rpc.RetryCache/NameNodeRetryCache.CacheHit" should 
be renamed to "rpc.RetryCache.NameNodeRetryCache.CacheHit"
Here - org.apache.hadoop.ipc.metrics.RetryCacheMetrics#RetryCacheMetrics
{code}
  RetryCacheMetrics(RetryCache retryCache) {
    name = "RetryCache/"+ retryCache.getCacheName();
    registry = new MetricsRegistry(name);
    if (LOG.isDebugEnabled()) {
      LOG.debug("Initialized "+ registry);
    }
  }
{code}



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