- Andres de la Peña
- Avinash Lakshman
- Aleksey Yeschenko
- Aaron Morton
- Ariel Weisberg
- Blake Eggleston
- Benedict Elliott Smith
- Benjamin Lerer
- Branimir Lambov
- Brandon Williams
- Carl Yeksigian
- David Brosiusd
- Dikang Gu
- Eric Evans
- Gary Dusbabek
- Chris Goffinet
- Alex Petrov
- Laine Jaakko Olavi
- T Jake Luciani
- Jason Brown
- Jonathan Ellis
- Jake Farrell
- Jeff Jirsa
- Joel Knighton
- Josh McKenzie
- Johan Oskarsson
- Jun Rao
- Jay Zhuang
- Sankalp Kohli
- Marcus Eriksson
- Michael Semb Wever
- Mikhail Stepura
- Michael Shuler
- Paulo Motta
- Prashant Malik
- Robert Stupp
- Peter Schuller
- Sam Tunnicliffe
- Sylvain Lebresne
- Stefania Alborghetti
- Tyler Hobbs
- Vijay Parthasarathy
- Pavel Yaskevich
- Yuki Morishita
- Nate McCall
/*
* 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.cassandra.service;
import org.apache.cassandra.exceptions.StartupException;
A test to determine if the system is in a valid state to start up.
Some implementations may not actually halt startup, but provide
information or advice on tuning and non-fatal environmental issues (e.g. like
checking for and warning about suboptimal JVM settings).
Other checks may indicate that they system is not in a correct state to be started.
Examples include inability to load JNA when the cassandra.boot_without_jna option
is not set, missing or unaccessible data directories, unreadable sstables and
misconfiguration of cluster_name in cassandra.yaml.
The StartupChecks class manages a collection of these tests, which it executes
right at the beginning of the server settup process.
/**
* A test to determine if the system is in a valid state to start up.
* Some implementations may not actually halt startup, but provide
* information or advice on tuning and non-fatal environmental issues (e.g. like
* checking for and warning about suboptimal JVM settings).
* Other checks may indicate that they system is not in a correct state to be started.
* Examples include inability to load JNA when the cassandra.boot_without_jna option
* is not set, missing or unaccessible data directories, unreadable sstables and
* misconfiguration of cluster_name in cassandra.yaml.
*
* The StartupChecks class manages a collection of these tests, which it executes
* right at the beginning of the server settup process.
*/
public interface StartupCheck
{
Run some test to determine whether the system is safe to be started
In the case where a test determines it is not safe to proceed, the
test should log a message regarding the reason for the failure and
ideally the steps required to remedy the problem.
Throws: - StartupException – if the test determines
that the environement or system is not in a safe state to startup
/**
* Run some test to determine whether the system is safe to be started
* In the case where a test determines it is not safe to proceed, the
* test should log a message regarding the reason for the failure and
* ideally the steps required to remedy the problem.
*
* @throws org.apache.cassandra.exceptions.StartupException if the test determines
* that the environement or system is not in a safe state to startup
*/
void execute() throws StartupException;
}