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Server functionality for HBase
<%--
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
--%>
<%@ page contentType="text/html;charset=UTF-8"
import="java.util.Date"
import="java.util.List"
import="org.apache.hadoop.conf.Configuration"
import="org.apache.hadoop.hbase.client.Admin"
import="org.apache.hadoop.hbase.client.SnapshotDescription"
import="org.apache.hadoop.hbase.http.InfoServer"
import="org.apache.hadoop.hbase.master.HMaster"
import="org.apache.hadoop.hbase.snapshot.SnapshotInfo"
import="org.apache.hadoop.util.StringUtils"
import="org.apache.hadoop.hbase.TableName"
import="org.apache.hadoop.hbase.client.ServerType"
import="org.apache.hadoop.hbase.client.LogEntry"
import="org.apache.hadoop.hbase.client.BalancerRejection"
import="org.apache.hadoop.hbase.client.BalancerDecision"
%>
<%
HMaster master = (HMaster)getServletContext().getAttribute(HMaster.MASTER);
Configuration conf = master.getConfiguration();
List logList = null;
List decisionList = null;
if(master.isInitialized()) {
try (Admin admin = master.getConnection().getAdmin()) {
logList = (List)(List)admin.getLogEntries(null, "BALANCER_REJECTION", ServerType.MASTER, 250, null);
decisionList = (List)(List)admin.getLogEntries(null, "BALANCER_DECISION", ServerType.MASTER, 250, null);
}
}
%>
Named Queues
Reason
CostFunctions Details
<% if (logList == null) { %>
<% } else { %>
<% for (BalancerRejection entry: logList) { %>
<%=entry.getReason()%>
<% List costFunctions = entry.getCostFuncInfoList();
if (costFunctions != null && !costFunctions.isEmpty()) { %>
<% for (String costFunctionInfo: entry.getCostFuncInfoList() ) { %>
<%= costFunctionInfo %>
<% } %>
<% } %>
<% } %>
Initial Function Costs
Final Function Costs
Init Total Cost
Computed Total Cost
Computed Steps
Region Plans
<% if (decisionList == null) { %>
<% } else { %>
<% for (BalancerDecision decision: decisionList) { %>
<%=decision.getInitialFunctionCosts()%>
<%=decision.getFinalFunctionCosts()%>
<%=StringUtils.format("%.2f", decision.getInitTotalCost())%>
<%=StringUtils.format("%.2f", decision.getComputedTotalCost())%>
<%=decision.getComputedSteps()%>
<%
List regionPlans = decision.getRegionPlans();
if ( regionPlans == null) {%>
<% for (String plan : regionPlans) { %>
<%=plan%>
<% } %>
<% } %>
<% } %>
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