我正试图为一组使用org.gradle.parallel=true运行的UT引入cassandra单元，用于春季启动应用程序。
运行所有测试并不可靠，尽管偶尔也能正常工作。
我想这与上描述的问题有关https://github.com/jsevellec/cassandra-unit/issues/155即，当下一个UT开始时，第一个实例仍然存在，似乎没有办法强迫它"迅速"关闭。
我最初给出不可靠结果的方法是使用org.gradle.parallel=true，即
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration
@TestExecutionListeners(
listeners = CassandraUnitTestExecutionListener.class,
mergeMode = MERGE_WITH_DEFAULTS
)
@CassandraDataSet
@EmbeddedCassandra
public class MyCassandraUnitTest {
@Test
public void xxx_xxx() {
}
}
如cassandra单元/wiki和StephanPraetsch github示例中所述
作为一种解决方法，我尝试删除注释，转而使用本机API，即尝试为所有测试保持一个运行，而使用org.gradle.parallel=false，这似乎是可靠的，但会降低整个构建的速度。(仍在测试以确保其不重合)使用此方法
机组等级前：
EmbeddedCassandraServerHelper.startEmbeddedCassandra();
和后单元类别：
EmbeddedCassandraServerHelper.cleanEmbeddedCassandra();
如中所述-https://github.com/jsevellec/cassandra-unit/wiki/How-to-use-it-in-your-code.
我在第一种方法中遇到的错误是像这样的超时
00:27:31.826 [Test worker] ERROR org.cassandraunit.utils.EmbeddedCassandraServerHelper - Cassandra daemon did not start after 20000 ms. Consider increasing the timeout
或者端口冲突，如
2017-02-02 19:44:41.741 ERROR 40053 --- [pool-2-thread-1] o.a.cassandra.service.CassandraDaemon : Fatal configuration error
org.apache.cassandra.exceptions.ConfigurationException: /127.0.0.1:7010 is in use by another process. Change listen_address:storage_port in cassandra.yaml to values that do not conflict with other services
at org.apache.cassandra.net.MessagingService.getServerSockets(MessagingService.java:557)
at org.apache.cassandra.net.MessagingService.listen(MessagingService.java:501)
at org.apache.cassandra.net.MessagingService.listen(MessagingService.java:485)
at org.apache.cassandra.service.StorageService.prepareToJoin(StorageService.java:745)
at org.apache.cassandra.service.StorageService.initServer(StorageService.java:648)
at org.apache.cassandra.service.StorageService.initServer(StorageService.java:548)
at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:385)
at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:601)
at org.cassandraunit.utils.EmbeddedCassandraServerHelper$1.run(EmbeddedCassandraServerHelper.java:129)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
2017-02-02 19:44:41.745 INFO 40053 --- [ Thread-7] o.s.w.c.s.GenericWebApplicationContext : Closing org.springframework.web.context.support.GenericWebApplicationContext@7ffd8dee: startup date [Thu Feb 02 19:44:17 GMT 2017]; root of context hierarchy
2017-02-02 19:44:41.972 WARN 40053 --- [iceShutdownHook] org.apache.cassandra.gms.Gossiper : No local state or state is in silent shutdown, not announcing shutdown
2017-02-02 19:44:41.972 INFO 40053 --- [iceShutdownHook] o.apache.cassandra.net.MessagingService : Waiting for messaging service to quiesce
2017-02-02 19:44:41.982 INFO 40053 --- [iceShutdownHook] org.apache.cassandra.hints.HintsService : Paused hints dispatch
2017-02-02 19:44:42.072 INFO 40053 --- [iceShutdownHook] org.apache.cassandra.hints.HintsService : Paused hints dispatch
回答我自己的问题：我牺牲了gradle中的并行项目构建，即我的gradle.properties中的org.gradle.parallel=false
在我的测试中有：
@BeforeClass
public static void before() throws InterruptedException, IOException, TTransportException {
EmbeddedCassandraServerHelper.startEmbeddedCassandra(20000);
}
@AfterClass
public static void after() throws InterruptedException, IOException, TTransportException {
EmbeddedCassandraServerHelper.cleanEmbeddedCassandra();
}
cleanEmbeddedCassandra()只是清除了密钥空间，但让Cassandra服务器仍在运行。
我更希望清理停止EmbeddedCassandraServer，而不是让它一直运行到进程退出。
这种方法确实有效，但不是我想要的——也许有人会发布更好的方式！
你试过这个吗？
EmbeddedCassandraServerHelper.startEmbeddedCassandra(EmbeddedCassandraServerHelper.CASSANDRA_RNDPORT_YML_FILE);