java.lang.AssertionError: Cassandra守护进程没有在超时期间启动

Question

我的考试班：

public class NetworkSettingsDaoTest {

@Rule
public CassandraCQLUnit cassandraCQLUnit = new CassandraCQLUnit(new ClassPathCQLDataSet("simpleWithCreateKeyspace.cql"));
public static Session session;
public static NetworkSettingsDao networkSettingsDao;
@Before
public void init() throws ConfigurationException, TTransportException, IOException, InterruptedException{
    EmbeddedCassandraServerHelper.startEmbeddedCassandra(5600000L);
    //Thread.sleep(4*1000); //workaround for weak machine
    session = cassandraCQLUnit.getSession();
    networkSettingsDao = new NetworkSettingsDao();
}

@Test
public void should_have_started_and_execute_cql_script() throws Exception {
    ResultSet result = session.execute("select * from mytable WHERE id='myKey01'");
    assertThat(result.iterator().next().getString("value"), is("myValue01"));
}   
}

我的simpleWithCreateKeyspace.cql文件：

CREATE KEYSPACE NETWORKSETTINGS WITH replication={'class' : 'SimpleStrategy', 'replication_factor':1};
USE NETWORKSETTINGS;

CREATE TABLE STBDevice(
    KEY varchar,
    SETTINGS_COLUMN varchar,
    AMSIP varchar,
    PRIMARY KEY(KEY));

INSERT INTO STBDevice(KEY, SETTINGS_COLUMN,AMSIP) values('myKey01','myColumn1','myAMSIP1');

例外情况：

卡桑德拉守护进程没有在org.cassandraunit.utils.EmbeddedCassandraServerHelper.startEmbeddedCassandra(EmbeddedCassandraServerHelper.java:130)，org.cassandraunit.utils.EmbeddedCassandraServerHelper.startEmbeddedCassandra(EmbeddedCassandraServerHelper.java:85)，org.cassandraunit.utils.EmbeddedCassandraServerHelper.startEmbeddedCassandra(EmbeddedCassandraServerHelper.java:64)，org.cassandraunit.utils.EmbeddedCassandraServerHelper.startEmbeddedCassandra(EmbeddedCassandraServerHelper.java:56)，org.cassandraunit.BaseCassandraUnit.before(BaseCassandraUnit.java:28)，org.junit.rules的超时时间内启动.ExternalResource$1.evaluate(ExternalResource.java:46) at org.junit.rules.RunRules.evaluate(RunRules.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) at org.jun.runners.ParentRunner$1(ParentRunner.java:63)在org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) at org.junit.runners.ParentRunner.run(ParentRunner.java:309) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdtinternal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

Answer 1

这个班帮助解决问题。

package org.cassandraunit.test.spring.cql;
import com.datastax.driver.core.Cluster;
import com.datastax.driver.core.ResultSet;
import com.datastax.driver.core.Session;
import org.cassandraunit.spring.CassandraDataSet;
import org.cassandraunit.spring.CassandraUnitTestExecutionListener;
import org.cassandraunit.spring.EmbeddedCassandra;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.TestExecutionListeners;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;


@RunWith(SpringJUnit4ClassRunner.class)
@TestExecutionListeners({ CassandraUnitTestExecutionListener.class })
@CassandraDataSet(value = { "simple.cql" })
@EmbeddedCassandra
public class SpringCQLScriptLoadTest {

@Test
public void should_have_started_and_execute_cql_script() throws Exception {
    Cluster cluster = Cluster.builder()
            .addContactPoints("127.0.0.1")
            .withPort(9142)
            .build();
    Session session = cluster.connect("cassandra_unit_keyspace");

    ResultSet result = session.execute("select * from mytable WHERE id='myKey01'");
    assertThat(result.iterator().next().getString("value"), is("myValue01"));
}
  }

Answer 2

看起来，这取决于你向Cassandra发出的查询次数。如果您有太多的查询无法运行，那么您需要增加EmbeddedCassandra注释中的超时。@EmbeddedCassandra(timeout = 100000L)