QueryCancelWorker.java

// 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
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// KIND, either express or implied.  See the License for the
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package org.apache.doris.qe;

import org.apache.doris.common.Status;
import org.apache.doris.common.util.MasterDaemon;
import org.apache.doris.system.Backend;
import org.apache.doris.system.SystemInfoService;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.util.List;


public class QueryCancelWorker extends MasterDaemon {
    private static final Logger LOG = LogManager.getLogger(QueryCancelWorker.class);
    private SystemInfoService systemInfoService;

    public QueryCancelWorker(SystemInfoService systemInfoService) {
        this.systemInfoService = systemInfoService;
    }

    @Override
    protected void runAfterCatalogReady() {
        List<Backend> allBackends;
        try {
            allBackends = systemInfoService.getAllBackendsByAllCluster().values().asList();
        } catch (Exception e) {
            LOG.warn("failed to get backends by current cluster", e);
            return;
        }

        for (Coordinator co : QeProcessorImpl.INSTANCE.getAllCoordinators()) {
            Status status = co.shouldCancel(allBackends);
            if (!status.ok()) {
                co.cancel(status);
            }
        }
    }
}