Package org.apache.accumulo.test.functional

Class HalfDeadTServerIT

java.lang.Object

org.apache.accumulo.harness.WithTestNames

org.apache.accumulo.harness.AccumuloITBase

org.apache.accumulo.test.functional.ConfigurableMacBase

org.apache.accumulo.test.functional.HalfDeadTServerIT

public class HalfDeadTServerIT
extends ConfigurableMacBase

This test verifies tserver behavior when the node experiences certain failure states that cause it to be unresponsive to network I/O and/or disk access.

This failure state is simulated in a tserver by running that tserver with a shared library that hooks the read/write system calls. When the shared library sees a specific trigger file, it pauses the system calls and prints "sleeping", until that file is deleted, after which it proxies the system call to the real system implementation.

In response to failures of the type this test simulates, the tserver should recover if the system call is stalled for less than the ZooKeeper timeout. Otherwise, it should lose its lock in ZooKeeper and terminate itself.

Field Summary

Fields inherited from class org.apache.accumulo.test.functional.ConfigurableMacBase

cluster, log, ROOT_PASSWORD

Fields inherited from class org.apache.accumulo.harness.AccumuloITBase

MINI_CLUSTER_ONLY, random, STANDALONE_CAPABLE_CLUSTER, SUNNY_DAY, ZOOKEEPER_TESTING_SERVER

Constructor Summary

Constructors

Constructor	Description
HalfDeadTServerIT()

Method Summary

Modifier and Type	Method	Description
static void	buildSharedLib()
void	configure(MiniAccumuloConfigImpl cfg, org.apache.hadoop.conf.Configuration hadoopCoreSite)
protected Duration	defaultTimeout()	Time to wait per-method before declaring a timeout, in seconds.
String	test(int seconds, boolean expectTserverDied)
void	testRecover()
void	testTimeout()

Methods inherited from class org.apache.accumulo.test.functional.ConfigurableMacBase

beforeClusterStart, configureForEnvironment, configureForSsl, exec, getClientProperties, getCluster, getServerContext, setUp, tearDown

Methods inherited from class org.apache.accumulo.harness.AccumuloITBase

createTestDir, getOnlyElement, getOnlyElement, getSslDir, getUniqueNames, initJar

Methods inherited from class org.apache.accumulo.harness.WithTestNames

setTestName, testName

Methods inherited from class java.lang.Object

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

Constructor Detail

HalfDeadTServerIT

public HalfDeadTServerIT()

Method Detail

defaultTimeout

protected Duration defaultTimeout()

Description copied from class: AccumuloITBase

Time to wait per-method before declaring a timeout, in seconds.

Overrides:

defaultTimeout in class AccumuloITBase

configure

public void configure(MiniAccumuloConfigImpl cfg,
                      org.apache.hadoop.conf.Configuration hadoopCoreSite)

Overrides:

configure in class ConfigurableMacBase

buildSharedLib

@BeforeAll
public static void buildSharedLib()
                           throws IOException,
                                  InterruptedException

Throws:

IOException

InterruptedException

testRecover

@Test
public void testRecover()
                 throws Exception

Throws:

Exception

testTimeout

@Test
public void testTimeout()
                 throws Exception

Throws:

Exception

test

public String test(int seconds,
                   boolean expectTserverDied)
            throws Exception

Throws:

Exception