我有一个3节点的cassandra集群，通过我在Java中的单元测试，我首先创建一个键空间，然后在该键空间中创建一个列族。有时单元测试通过但随机我不断收到以下错误。我使用最新的datastax 2.1.4 java驱动程序和2.1.0中的cassandra版本。
com.symc.edp.database.nosql.NoSQLPersistenceException: com.datastax.driver.core.exceptions.InvalidQueryException: Cannot add column family 'testmaxcolumnstable' to non existing keyspace 'testmaxcolumnskeyspace'.
at com.symc.edp.database.nosql.cassandra.CassandraCQLTableEditor.createTable(CassandraCQLTableEditor.java:67)
at com.symc.edp.database.nosql.cassandra.TestCassandraWideRowPerformance.testWideRowInserts(TestCassandraWideRowPerformance.java:74)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.lang.reflect.Method.invoke(Method.java:483)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: com.datastax.driver.core.exceptions.InvalidQueryException: Cannot add column family 'testmaxcolumnstable' to non existing keyspace 'testmaxcolumnskeyspace'.
at com.datastax.driver.core.exceptions.InvalidQueryException.copy(InvalidQueryException.java:35)
at com.datastax.driver.core.DefaultResultSetFuture.extractCauseFromExecutionException(DefaultResultSetFuture.java:289)
at com.datastax.driver.core.DefaultResultSetFuture.getUninterruptibly(DefaultResultSetFuture.java:205)
at com.datastax.driver.core.AbstractSession.execute(AbstractSession.java:52)
at com.datastax.driver.core.AbstractSession.execute(AbstractSession.java:36)
at com.symc.edp.database.nosql.cassandra.CassandraCQLTableEditor.createTable(CassandraCQLTableEditor.java:65)
... 6 more
Caused by: com.datastax.driver.core.exceptions.InvalidConfigurationInQueryException: Cannot add column family 'testmaxcolumnstable' to non existing keyspace 'testmaxcolumnskeyspace'.
at com.datastax.driver.core.Responses$Error.asException(Responses.java:104)
at com.datastax.driver.core.DefaultResultSetFuture.onSet(DefaultResultSetFuture.java:140)
at com.datastax.driver.core.RequestHandler.setFinalResult(RequestHandler.java:249)
at com.datastax.driver.core.RequestHandler.onSet(RequestHandler.java:421)
at com.datastax.driver.core.Connection$Dispatcher.messageReceived(Connection.java:697)
at com.datastax.shaded.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
at com.datastax.shaded.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
at com.datastax.shaded.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
at com.datastax.shaded.netty.channel.Channels.fireMessageReceived(Channels.java:296)
at com.datastax.shaded.netty.handler.codec.oneone.OneToOneDecoder.handleUpstream(OneToOneDecoder.java:70)
at com.datastax.shaded.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
at com.datastax.shaded.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
at com.datastax.shaded.netty.channel.Channels.fireMessageReceived(Channels.java:296)
at com.datastax.shaded.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:462)
at com.datastax.shaded.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:443)
at com.datastax.shaded.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:303)
at com.datastax.shaded.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
at com.datastax.shaded.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
at com.datastax.shaded.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
at com.datastax.shaded.netty.channel.Channels.fireMessageReceived(Channels.java:268)
at com.datastax.shaded.netty.channel.Channels.fireMessageReceived(Channels.java:255)
at com.datastax.shaded.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)
at com.datastax.shaded.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108)
at com.datastax.shaded.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:318)
at com.datastax.shaded.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
at com.datastax.shaded.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
at com.datastax.shaded.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
at com.datastax.shaded.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
在cassandra的system.log文件中，我看到以下异常：
ERROR [SharedPool-Worker-1] 2015-01-28 15:08:24,286 ErrorMessage.java:218 - Unexpected exception during request
java.io.IOException: Connection reset by peer
at sun.nio.ch.FileDispatcherImpl.read0(Native Method) ~[na:1.8.0_05]
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39) ~[na:1.8.0_05]
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223) ~[na:1.8.0_05]
at sun.nio.ch.IOUtil.read(IOUtil.java:192) ~[na:1.8.0_05]
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:375) ~[na:1.8.0_05]
at io.netty.buffer.PooledUnsafeDirectByteBuf.setBytes(PooledUnsafeDirectByteBuf.java:311) ~[netty-all-4.0.20.Final.jar:4.0.20.Final]
at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:878) ~[netty-all-4.0.20.Final.jar:4.0.20.Final]
at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:225) ~[netty-all-4.0.20.Final.jar:4.0.20.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:114) ~[netty-all-4.0.20.Final.jar:4.0.20.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:507) ~[netty-all-4.0.20.Final.jar:4.0.20.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:464) ~[netty-all-4.0.20.Final.jar:4.0.20.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:378) ~[netty-all-4.0.20.Final.jar:4.0.20.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:350) ~[netty-all-4.0.20.Final.jar:4.0.20.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116) ~[netty-all-4.0.20.Final.jar:4.0.20.Final]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_05]
INFO [SharedPool-Worker-1] 2015-01-28 15:13:01,051 MigrationManager.java:229 - Create new Keyspace: KSMetaData{name=testmaxcolumnskeyspace, strategyClass=SimpleStrategy, strategyOptions={replication_factor=1}, cfMetaData={}, durableWrites=true, userTypes=org.apache.cassandra.config.UTMetaData@790ee1bb}
INFO [MigrationStage:1] 2015-01-28 15:13:01,058 ColumnFamilyStore.java:856 - Enqueuing flush of schema_keyspaces: 512 (0%) on-heap, 0 (0%) off-heap
INFO [MemtableFlushWriter:7] 2015-01-28 15:13:01,059 Memtable.java:326 - Writing Memtable-schema_keyspaces@1727029917(138 serialized bytes, 3 ops, 0%/0% of on/off-heap limit)
INFO [MemtableFlushWriter:7] 2015-01-28 15:13:01,077 Memtable.java:360 - Completed flushing /usr/share/apache-cassandra-2.1.0/bin/../data/data/system/schema_keyspaces-b0f2235744583cdb9631c43e59ce3676/system-schema_keyspaces-ka-103-Data.db (175 bytes) for commitlog position ReplayPosition(segmentId=1422485457803, position=1181)
另外，我通过devcenter验证了密钥空间没有被创建。
答案 0 :(得分：0)
在没有看到你的代码的情况下，我猜你需要在创建密钥空间和尝试在其中创建表之间保持睡眠。在尝试使用它之前，您可能需要在几秒钟内将键空间定义传播到集群中的所有节点。
答案 1 :(得分：0)
如上所述，有助于查看您的配置类。我们使用ClassPathCQLDataSet发出我们的语句并同时创建keyspace（link to ClassPathCqlDataSet documentation，请注意位置2和3的布尔值告诉它创建和删除键空间）。 db.cql是我们保存创建表格状态的文件。以下是我们的配置，可能对您有所帮助：
package some.package;
import org.cassandraunit.CQLDataLoader;
import org.cassandraunit.dataset.cql.ClassPathCQLDataSet;
import org.cassandraunit.utils.EmbeddedCassandraServerHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.core.io.ClassPathResource;
import com.datastax.driver.core.Cluster;
import com.datastax.driver.core.Session;
@Configuration
@Profile({"test"})
public class TestCassandraConfig implements DisposableBean {
private static final Logger LOGGER = LoggerFactory.getLogger(TestCassandraConfig.class);
private final String CQL = "db.cql";
@Value("${cassandra.contact_points:localhost}")
private String contact_points;
@Value("${cassandra.port:9142}")
private int port;
@Value("${cassandra.keyspace:test}")
private String keyspace;
private static Cluster cluster;
private static Session session;
private static SessionProxy sessionProxy;
@Bean
public Session session() throws Exception {
if (session == null) {
initialize();
}
return sessionProxy;
}
@Bean
public TestApplicationContext testApplicationContext() {
return new TestApplicationContext();
}
private void initialize() throws Exception {
LOGGER.info("Starting embedded cassandra server");
EmbeddedCassandraServerHelper.startEmbeddedCassandra("another-cassandra.yaml");
LOGGER.info("Connect to embedded db");
cluster = Cluster.builder().addContactPoints(contact_points).withPort(port).build();
session = cluster.connect();
LOGGER.info("Initialize keyspace");
final CQLDataLoader cqlDataLoader = new CQLDataLoader(session);
cqlDataLoader.load(new ClassPathCQLDataSet(CQL, false, true, keyspace));
}
@Override
public void destroy() throws Exception {
if (cluster != null) {
cluster.close();
cluster = null;
}
}
}