com.linkedin.pinot.tools.admin.command.VerifySegmentState.java Source code

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Here is the source code for com.linkedin.pinot.tools.admin.command.VerifySegmentState.java

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/**
 * Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
 *
 * Licensed 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.
 */
package com.linkedin.pinot.tools.admin.command;

import com.google.common.collect.Sets;
import com.linkedin.pinot.tools.AbstractBaseCommand;
import com.linkedin.pinot.tools.Command;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.helix.manager.zk.ZKHelixAdmin;
import org.apache.helix.model.ExternalView;
import org.apache.helix.model.IdealState;
import org.kohsuke.args4j.CmdLineException;
import org.kohsuke.args4j.CmdLineParser;
import org.kohsuke.args4j.Option;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class VerifySegmentState extends AbstractBaseCommand implements Command {
    private static final Logger LOGGER = LoggerFactory.getLogger(VerifySegmentState.class);

    @Option(name = "-zkAddress", required = true, metaVar = "<http>", usage = "Zookeeper server:port/cluster")
    String zkAddress = AbstractBaseCommand.DEFAULT_ZK_ADDRESS + "/pinot-cluster";

    @Option(name = "-clusterName", required = true, metaVar = "<String>", usage = "Helix cluster name")
    String clusterName;

    @Option(name = "-tablePrefix", required = false, metaVar = "<String>", usage = "Table name prefix. (Ex: myTable, my or myTable_OFFLINE)")
    String tablePrefix = "";

    @Option(name = "-help", required = false, help = true, aliases = { "-h", "--h",
            "--help" }, usage = "Print this message.")
    private boolean help = false;

    public boolean getHelp() {
        return help;
    }

    @Override
    public boolean execute() throws Exception {
        ZKHelixAdmin helixAdmin = new ZKHelixAdmin(zkAddress);
        List<String> resourcesInCluster = helixAdmin.getResourcesInCluster(clusterName);

        for (String resourceName : resourcesInCluster) {
            if (resourceName.startsWith(tablePrefix)) {
                IdealState resourceIdealState = helixAdmin.getResourceIdealState(clusterName, resourceName);
                ExternalView resourceExternalView = helixAdmin.getResourceExternalView(clusterName, resourceName);
                Map<String, Map<String, String>> mapFieldsFromIS = resourceIdealState.getRecord().getMapFields();
                Map<String, Map<String, String>> mapFieldsFromEV = resourceExternalView.getRecord().getMapFields();
                boolean error = false;
                if (mapFieldsFromIS.size() != mapFieldsFromEV.size()) {
                    LOGGER.info("Table: {}, idealState size: {} does NOT match external view size: {}",
                            resourceName, mapFieldsFromIS.size(), mapFieldsFromEV.size());
                    error = true;
                }
                if (!mapFieldsFromIS.keySet().equals(mapFieldsFromEV.keySet())) {
                    Set<String> idealStateKeys = mapFieldsFromIS.keySet();
                    Set<String> externalViewKeys = mapFieldsFromEV.keySet();
                    Sets.SetView<String> isToEVDiff = Sets.difference(idealStateKeys, externalViewKeys);
                    for (String segmentName : isToEVDiff) {
                        LOGGER.info("Segment: {} is missing in external view, ideal state: {}", segmentName,
                                mapFieldsFromIS.get(segmentName));
                    }

                    Sets.SetView<String> evToISDiff = Sets.difference(externalViewKeys, idealStateKeys);
                    for (String segmentName : evToISDiff) {
                        LOGGER.error("Segment: {} is missing in ideal state, external view: {}", segmentName,
                                mapFieldsFromEV.get(segmentName));
                    }
                    error = true;
                }

                for (Map.Entry<String, Map<String, String>> idealEntry : mapFieldsFromIS.entrySet()) {
                    String segmentName = idealEntry.getKey();
                    Map<String, String> segmentIdealState = idealEntry.getValue();
                    // try to format consistently for tool based parsing
                    if (!mapFieldsFromEV.containsKey(segmentName)) {
                        LOGGER.info("Segment: {} idealstate: {} is MISSING in external view: {}", segmentName,
                                segmentIdealState, "");
                    }
                    Map<String, String> segmentExternalView = mapFieldsFromEV.get(segmentName);

                    if (!segmentIdealState.equals(segmentExternalView)) {
                        LOGGER.info("Segment: {} idealstate: {} does NOT match external view: {}", segmentName,
                                segmentIdealState, segmentExternalView);
                        error = true;
                    }
                }
                LOGGER.info(resourceName + " = " + (error ? "ERROR" : "OK"));
            }
        }
        return true;
    }

    @Override
    public String description() {
        return "Compares helix IdealState and ExternalView for specified table prefixes";
    }

    public static void main(String[] args) throws Exception {
        VerifySegmentState verifier = new VerifySegmentState();
        CmdLineParser cmdLineParser = new CmdLineParser(verifier);
        try {
            cmdLineParser.parseArgument(args);
        } catch (CmdLineException e) {
            LOGGER.error("Failed to read command line arguments: ", e);
            cmdLineParser.printUsage(System.err);
            System.exit(1);
        }
        verifier.execute();
    }
}