Package org.apache.solr.cloud

Class ChaosMonkey

java.lang.Object

org.apache.solr.cloud.ChaosMonkey

public class ChaosMonkey
extends Object

The monkey can stop random or specific jetties used with SolrCloud.

It can also run in a background thread and start and stop jetties randomly.

TODO: expire multiple sessions / connectionloss at once

TODO: kill multiple jetties at once

TODO: ? add random headhunter mode that always kills the leader

TODO: chaosmonkey should be able to do cluster stop/start tests

Constructor Summary

Constructors

Constructor	Description
ChaosMonkey(ZkTestServer zkServer, org.apache.solr.common.cloud.ZkStateReader zkStateReader, String collection, Map<String,List<AbstractFullDistribZkTestBase.CloudJettyRunner>> shardToJetty, Map<String,AbstractFullDistribZkTestBase.CloudJettyRunner> shardToLeaderJetty)

Method Summary

Modifier and Type	Method	Description
static void	causeConnectionLoss(JettySolrRunner jetty)
void	causeSomeChaos()	causes some randomly selected chaos
void	expireRandomSession()
void	expireSession(JettySolrRunner jetty)
static void	expireSession(JettySolrRunner jetty, ZkTestServer zkServer)
AbstractFullDistribZkTestBase.CloudJettyRunner	getRandomJetty(String slice, boolean aggressivelyKillLeaders)
JettySolrRunner	getShard(String slice, int index)
int	getStarts()
AbstractFullDistribZkTestBase.CloudJettyRunner	killRandomShard()
AbstractFullDistribZkTestBase.CloudJettyRunner	killRandomShard(String slice)
static void	monkeyLog(String msg)
static void	monkeyLog(String msg, Object... logParams)
void	randomConnectionLoss()
static void	start(List<JettySolrRunner> jettys)
void	startAll()
void	startTheMonkey(boolean killLeaders, int roundPauseUpperLimit)
static void	stop(List<JettySolrRunner> jettys)
void	stopAll(int pauseBetweenMs)
void	stopJetty(AbstractFullDistribZkTestBase.CloudJettyRunner cjetty)
AbstractFullDistribZkTestBase.CloudJettyRunner	stopRandomShard()
AbstractFullDistribZkTestBase.CloudJettyRunner	stopRandomShard(String slice)
void	stopShard(String slice)
AbstractFullDistribZkTestBase.CloudJettyRunner	stopShard(String slice, int index)
void	stopShardExcept(String slice, String shardName)
void	stopTheMonkey()
static void	wait(long runLength, String collectionName, org.apache.solr.common.cloud.ZkStateReader zkStateReader)	You can call this method to wait while the ChaosMonkey is running, it waits approximately the specified time, and periodically logs the status of the collection

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ChaosMonkey

public ChaosMonkey(ZkTestServer zkServer,
 org.apache.solr.common.cloud.ZkStateReader zkStateReader,
 String collection,
 Map<String,List<AbstractFullDistribZkTestBase.CloudJettyRunner>> shardToJetty,
 Map<String,AbstractFullDistribZkTestBase.CloudJettyRunner> shardToLeaderJetty)

Method Details

expireSession

public void expireSession(JettySolrRunner jetty)

expireSession

public static void expireSession(JettySolrRunner jetty,
 ZkTestServer zkServer)

expireRandomSession

public void expireRandomSession()
                         throws org.apache.zookeeper.KeeperException,
InterruptedException

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

randomConnectionLoss

public void randomConnectionLoss()
                          throws org.apache.zookeeper.KeeperException,
InterruptedException

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

causeConnectionLoss

public static void causeConnectionLoss(JettySolrRunner jetty)

stopShard

public AbstractFullDistribZkTestBase.CloudJettyRunner stopShard(String slice,
 int index)
                                                         throws Exception

Throws:

Exception

stopJetty

public void stopJetty(AbstractFullDistribZkTestBase.CloudJettyRunner cjetty)
               throws Exception

Throws:

Exception

stopAll

public void stopAll(int pauseBetweenMs)
             throws Exception

Throws:

Exception

startAll

public void startAll()
              throws Exception

Throws:

Exception

stopShard

public void stopShard(String slice)
               throws Exception

Throws:

Exception

stopShardExcept

public void stopShardExcept(String slice,
 String shardName)
                     throws Exception

Throws:

Exception

getShard

public JettySolrRunner getShard(String slice,
 int index)
                         throws Exception

Throws:

Exception

stopRandomShard

public AbstractFullDistribZkTestBase.CloudJettyRunner stopRandomShard()
                                                               throws Exception

Throws:

Exception

stopRandomShard

public AbstractFullDistribZkTestBase.CloudJettyRunner stopRandomShard(String slice)
                                                               throws Exception

Throws:

Exception

killRandomShard

public AbstractFullDistribZkTestBase.CloudJettyRunner killRandomShard()
                                                               throws Exception

Throws:

Exception

killRandomShard

public AbstractFullDistribZkTestBase.CloudJettyRunner killRandomShard(String slice)
                                                               throws Exception

Throws:

Exception

getRandomJetty

public AbstractFullDistribZkTestBase.CloudJettyRunner getRandomJetty(String slice,
 boolean aggressivelyKillLeaders)
                                                              throws org.apache.zookeeper.KeeperException,
InterruptedException

Throws:

org.apache.zookeeper.KeeperException

InterruptedException

startTheMonkey

public void startTheMonkey(boolean killLeaders,
 int roundPauseUpperLimit)

monkeyLog

public static void monkeyLog(String msg)

monkeyLog

public static void monkeyLog(String msg,
 Object... logParams)

stopTheMonkey

public void stopTheMonkey()

causeSomeChaos

public void causeSomeChaos()
                    throws Exception

causes some randomly selected chaos

Throws:

Exception

getStarts

public int getStarts()

stop

public static void stop(List<JettySolrRunner> jettys)
                 throws Exception

Throws:

Exception

start

public static void start(List<JettySolrRunner> jettys)
                  throws Exception

Throws:

Exception

wait

public static void wait(long runLength,
 String collectionName,
 org.apache.solr.common.cloud.ZkStateReader zkStateReader)
                 throws InterruptedException

You can call this method to wait while the ChaosMonkey is running, it waits approximately the specified time, and periodically logs the status of the collection

Parameters:

runLength - The time in ms to wait

collectionName - The main collection being used for the ChaosMonkey

zkStateReader - current state reader

Throws:

InterruptedException