/*
* Copyright 2010 The Apache Software Foundation
*
* 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 org.apache.hadoop.hbase.DoNotRetryIOException;
import org.apache.hadoop.hbase.HServerAddress;
import org.apache.hadoop.hbase.regionserver.NoSuchColumnFamilyException;
import org.apache.hadoop.hbase.util.Addressing;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* This subclass of {@link org.apache.hadoop.hbase.client.RetriesExhaustedException}
* is thrown when we have more information about which rows were causing which
* exceptions on what servers. You can call {@link #mayHaveClusterIssues()}
* and if the result is false, you have input error problems, otherwise you
* may have cluster issues. You can iterate over the causes, rows and last
* known server addresses via {@link #getNumExceptions()} and
* {@link #getCause(int)}, {@link #getRow(int)} and {@link #getAddress(int)}.
*/
@SuppressWarnings("serial")
public class RetriesExhaustedWithDetailsException
extends RetriesExhaustedException {
List<Throwable> exceptions;
List<Row> actions;
List<String> hostnameAndPort;
public RetriesExhaustedWithDetailsException(List<Throwable> exceptions,
List<Row> actions,
List<String> hostnameAndPort) {
super("Failed " + exceptions.size() + " action" +
pluralize(exceptions) + ": " +
getDesc(exceptions, actions, hostnameAndPort));
this.exceptions = exceptions;
this.actions = actions;
this.hostnameAndPort = hostnameAndPort;
}
public List<Throwable> getCauses() {
return exceptions;
}
public int getNumExceptions() {
return exceptions.size();
}
public Throwable getCause(int i) {
return exceptions.get(i);
}
public Row getRow(int i) {
return actions.get(i);
}
public HServerAddress getAddress(int i) {
return new HServerAddress(Addressing.createInetSocketAddressFromHostAndPortStr(getHostnamePort(i)));
}
public String getHostnamePort(final int i) {
return this.hostnameAndPort.get(i);
}
public boolean mayHaveClusterIssues() {
boolean res = false;
// If all of the exceptions are DNRIOE not exception
for (Throwable t : exceptions) {
if ( !(t instanceof DoNotRetryIOException)) {
res = true;
}
}
return res;
}
public static String pluralize(Collection<?> c) {
return pluralize(c.size());
}
public static String pluralize(int c) {
return c > 1 ? "s" : "";
}
public static String getDesc(List<Throwable> exceptions,
List<Row> actions,
List<String> hostnamePort) {
String s = getDesc(classifyExs(exceptions));
s += "servers with issues: ";
Set<String> uniqAddr = new HashSet<String>();
uniqAddr.addAll(hostnamePort);
for(String addr : uniqAddr) {
s += addr + ", ";
}
return s;
}
public static Map<String, Integer> classifyExs(List<Throwable> ths) {
Map<String, Integer> cls = new HashMap<String, Integer>();
for (Throwable t : ths) {
if (t == null) continue;
String name = "";
if (t instanceof NoSuchColumnFamilyException) {
name = t.getMessage();
} else {
name = t.getClass().getSimpleName();
}
Integer i = cls.get(name);
if (i == null) {
i = 0;
}
i += 1;
cls.put(name, i);
}
return cls;
}
public static String getDesc(Map<String,Integer> classificaton) {
String s = "";
for (Map.Entry<String, Integer> e : classificaton.entrySet()) {
s += e.getKey() + ": " + e.getValue() + " time" +
pluralize(e.getValue()) + ", ";
}
return s;
}
}