我看到了以下错误:
java.lang.NoClassDefFoundError: com/google/common/util/concurrent/FutureFallback
当调用cluster.connect()
时:
String hosts = CassandraClientUtil.getHost();
String localDC = CassandraClientUtil.getLocalDC();
Cluster cluster = null;
if (StringUtils.isNotEmpty(localDC))
{
cluster = Cluster.builder().addContactPoints(hosts.split(","))
.withCredentials(CassandraCopsComponentLogger.USER_NAME, CassandraCopsComponentLogger.AUTH_CODE)
.withQueryOptions(new QueryOptions().setConsistencyLevel(ConsistencyLevel.LOCAL_ONE))
.withLoadBalancingPolicy(new TokenAwarePolicy(DCAwareRoundRobinPolicy.builder().withLocalDc(localDC).build())).build();
}
else
{
cluster = Cluster.builder().addContactPoints(hosts.split(","))
.withCredentials(CassandraCopsComponentLogger.USER_NAME, CassandraCopsComponentLogger.AUTH_CODE)
.withQueryOptions(new QueryOptions().setConsistencyLevel(ConsistencyLevel.LOCAL_ONE)).build();
}
Session session = cluster.connect();
CassandraCopsComponentLogger.mappingManager = new MappingManager(session);
pom.xml文件具有以下依赖关系:
<dependencies>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>16.0.1</version>
</dependency>
<dependency>
<groupId>com.datastax.cassandra</groupId>
<artifactId>cassandra-driver-core</artifactId>
<version>2.1.9</version>
</dependency>
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty</artifactId>
<version>3.9.0.Final</version>
</dependency>
<dependency>
<groupId>com.codahale.metrics</groupId>
<artifactId>metrics-core</artifactId>
<version>3.0.2</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
</dependency>
<dependency>
<groupId>com.datastax.cassandra</groupId>
<artifactId>cassandra-driver-mapping</artifactId>
<version>2.1.9</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.3.1</version>
</dependency>
</dependencies>
我在stackoverflow看到了一篇帖子(链接),其中建议将guava版本升级到16.0.1,但这并没有帮助我解决问题。由于我刚接触cassandra,所以我需要更多的指导。补充一下背景信息,这个项目可以作为一个独立项目运行,但当我将其作为maven依赖项添加到其他项目中时,就会出现此运行时错误。