org.apache.pinot.broker.failuredetector.ConnectionFailureDetector Maven / Gradle / Ivy

/**
 * 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.
 */
package org.apache.pinot.broker.failuredetector;

import javax.annotation.concurrent.ThreadSafe;
import org.apache.pinot.core.transport.QueryResponse;
import org.apache.pinot.core.transport.ServerRoutingInstance;


/**
 * The {@code ConnectionFailureDetector} marks failed server (connection failure) from query response as unhealthy, and
 * retries the unhealthy servers with exponential increasing delays.
 */
@ThreadSafe
public class ConnectionFailureDetector extends BaseExponentialBackoffRetryFailureDetector {

  @Override
  public void notifyQuerySubmitted(QueryResponse queryResponse) {
  }

  @Override
  public void notifyQueryFinished(QueryResponse queryResponse) {
    ServerRoutingInstance failedServer = queryResponse.getFailedServer();
    if (failedServer != null) {
      markServerUnhealthy(failedServer.getInstanceId());
    }
  }
}