org.apache.hadoop.hbase.client.FailureInfo Maven / Gradle / Ivy
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* 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.hadoop.hbase.client;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.yetus.audience.InterfaceAudience;
/**
* Keeps track of repeated failures to any region server. Multiple threads manipulate the contents
* of this thread.
*
* Access to the members is guarded by the concurrent nature of the members inherently.
*
*/
@InterfaceAudience.Private
class FailureInfo {
// The number of consecutive failures.
final AtomicLong numConsecutiveFailures = new AtomicLong();
// The time when the server started to become unresponsive
// Once set, this would never be updated.
final long timeOfFirstFailureMilliSec;
// The time when the client last tried to contact the server.
// This is only updated by one client at a time
volatile long timeOfLatestAttemptMilliSec;
// Used to keep track of concurrent attempts to contact the server.
// In Fast fail mode, we want just one client thread to try to connect
// the rest of the client threads will fail fast.
final AtomicBoolean exclusivelyRetringInspiteOfFastFail = new AtomicBoolean(false);
@Override
public String toString() {
return "FailureInfo: numConsecutiveFailures = "
+ numConsecutiveFailures + " timeOfFirstFailureMilliSec = "
+ timeOfFirstFailureMilliSec + " timeOfLatestAttemptMilliSec = "
+ timeOfLatestAttemptMilliSec
+ " exclusivelyRetringInspiteOfFastFail = "
+ exclusivelyRetringInspiteOfFastFail.get();
}
FailureInfo(long firstFailureTime) {
this.timeOfFirstFailureMilliSec = firstFailureTime;
}
}