我试图从Spark 1.3连接到Cassandra 3.0。我知道每个版本的火花都有Cassandra连接器,但连接器取决于cassandra-driver-core:2.1.5
,这就是为什么我使用最新的cassandra连接器取决于最新的核心驱动程序。无论如何,迄今为止这不是问题。问题是我想的com.google.guava
包。Spark 1.3和Cassandra 3.0番石榴问题
我POM看起来是这样的:
...
<dependency>
<groupId>com.datastax.spark</groupId>
<artifactId>spark-cassandra-connector-java_2.10</artifactId>
<version>1.5.0-M3</version>
</dependency>
<dependency>
<groupId>com.datastax.spark</groupId>
<artifactId>spark-cassandra-connector_2.10</artifactId>
<version>1.5.0-M3</version>
</dependency>
...
我从到处都排除谷歌番石榴:
<exclusions>
<exclusion>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
</exclusion>
</exclusions>
所以在依赖关系树仅此存在com.datastax.spark:spark-cassandra-connector-java_2.10:jar:1.5.0-M3:compile
下com.google.guava:guava:jar:16.0.1
。 但是我仍然收到以下错误:
yarn.ApplicationMaster: User class threw exception: Failed to open native connection to Cassandra at {139.19.52.111}:9042
java.io.IOException: Failed to open native connection to Cassandra at {139.19.52.111}:9042
at com.datastax.spark.connector.cql.CassandraConnector$.com$datastax$spark$connector$cql$CassandraConnector$$createSession(CassandraConnector.scala:162)
at com.datastax.spark.connector.cql.CassandraConnector$$anonfun$2.apply(CassandraConnector.scala:148)
at com.datastax.spark.connector.cql.CassandraConnector$$anonfun$2.apply(CassandraConnector.scala:148)
at com.datastax.spark.connector.cql.RefCountedCache.createNewValueAndKeys(RefCountedCache.scala:31)
at com.datastax.spark.connector.cql.RefCountedCache.acquire(RefCountedCache.scala:56)
at com.datastax.spark.connector.cql.CassandraConnector.openSession(CassandraConnector.scala:81)
at com.ambiverse.tagging.dao.impl.DAOCassandra.createTable(DAOCassandra.java:45)
at com.ambiverse.tagging.dao.impl.DAOCassandra.createTable(DAOCassandra.java:64)
at com.ambiverse.tagging.dao.impl.DAOCassandra.savePairRDD(DAOCassandra.java:70)
at com.ambiverse.tagging.statistics.entitycorrelation.CorrelationStatisticsSparkRunner.run(CorrelationStatisticsSparkRunner.java:176)
at com.ambiverse.tagging.statistics.entitycorrelation.CorrelationStatisticsSparkRunner.main(CorrelationStatisticsSparkRunner.java:94)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.apache.spark.deploy.yarn.ApplicationMaster$$anon$2.run(ApplicationMaster.scala:480)
Caused by: java.lang.NoSuchMethodError: com.google.common.util.concurrent.Futures.withFallback(Lcom/google/common/util/concurrent/ListenableFuture;Lcom/google/common/util/concurrent/FutureFallback;Ljava/util/concurrent/Executor;)Lcom/google/common/util/concurrent/ListenableFuture;
at com.datastax.driver.core.Connection.initAsync(Connection.java:178)
at com.datastax.driver.core.Connection$Factory.open(Connection.java:742)
at com.datastax.driver.core.ControlConnection.tryConnect(ControlConnection.java:240)
at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:187)
at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:79)
at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1393)
at com.datastax.driver.core.Cluster.getMetadata(Cluster.java:402)
at com.datastax.spark.connector.cql.CassandraConnector$.com$datastax$spark$connector$cql$CassandraConnector$$createSession(CassandraConnector.scala:155)
有人点我前此博客张贴的解决方案:http://arjon.es/2015/10/12/making-hadoop-2-dot-6-plus-spark-cassandra-driver-play-nice-together/,我使用Maven作为构建工具,而不是SBT。如果你知道如何用maven做同样的事情,那会很棒。
这很奇怪,对我来说这个错误似乎表明你必须在classpath中有一个比14.0更早的番石榴版本,就像引入了Fallback时一样。另一方面,我们已经在datastax java-driver中添加了一些验证,以便在检测到旧版本番石榴时抛出异常... –
顺便说一句,如果我从IDEA启动Spark,如何解决它? – szu