【发布时间】：2016-11-15 21:48:27
【问题描述】：
我在 Hadoop-2.7.2 版本上有 Cassandra-3.7 版本和 Spark-1.6.2 版本。我一直在尝试将 Cassandra 与 Spark 集成。为此，请按照http://www.planetcassandra.org/blog/kindling-an-introduction-to-spark-with-cassandra/ 中的说明进行操作。
按照说明，我克隆了 spark-cassandra-connector 项目：
git clone https://github.com/datastax/spark-cassandra-connector
克隆项目后，我将工作目录更改为 spark-cassandra-connector：
cd spark-cassandra-connector/
在 spark-cassandra-connector 目录中，我给出了以下命令来构建连接器：
./sbt/sbt assembly
但是构建失败并出现以下错误：
[error] 4 not found
[error] /.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar
[error] /.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar
[error] /.m2/repository/commons-httpclient/commons-httpclient/3.1/commons-httpclient-3.1.jar
[error] /.m2/repository/log4j/log4j/1.2.17/log4j-1.2.17.jar
整个输出如下：
Attempting to fetch sbt
Launching sbt from sbt/sbt-launch-0.13.9.jar
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=350m; support was removed in 8.0
[info] Loading project definition from /usr/local/spark-cassandra-connector/project
[info] Updating {file:/usr/local/spark-cassandra-connector/project/}spark-cassandra-connector-build...
[info] Resolving org.eclipse.jgit#org.eclipse.jgit.archive;3.7.0.201502260915-r [info] Resolving org.scala-sbt.ivy#ivy;2.3.0-sbt-c5d1b95fdcc1e1007740ffbecf4eb07[info] Resolving org.fusesource.jansi#jansi;1.4 ...
[info] Done updating.
[warn] There may be incompatibilities among your library dependencies.
[warn] Here are some of the libraries that were evicted:
[warn] * net.virtual-void:sbt-dependency-graph:0.7.4 -> 0.8.2
[warn] Run 'evicted' to see detailed eviction warnings
[info] Compiling 6 Scala sources to /usr/local/spark-cassandra-connector/project/target/scala-2.10/sbt-0.13/classes...
[warn] there were 4 feature warning(s); re-run with -feature for details
[warn] one warning found
Using releases: https://oss.sonatype.org/service/local/staging/deploy/maven2 for releases
Using snapshots: https://oss.sonatype.org/content/repositories/snapshots for snapshots
Scala: 2.10.6 [To build against Scala 2.11 use '-Dscala-2.11=true']
Scala Binary: 2.10
Java: target=1.7 user=1.8.0_77
Cassandra version for testing: 3.0.2 [can be overridden by specifying '-Dtest.cassandra.version=<version>']
[info] Set current project to root (in build file:/usr/local/spark-cassandra-connector/)
[warn] Credentials file /.ivy2/.credentials does not exist
[info] Formatting 46 Scala sources {file:/usr/local/spark-cassandra-connector/}spark-cassandra-connector(test) ...
[info] Formatting 158 Scala sources {file:/usr/local/spark-cassandra-connector/}spark-cassandra-connector(compile) ...
[warn] Credentials file /.ivy2/.credentials does not exist
[warn] Credentials file /.ivy2/.credentials does not exist
[info] Updating com.datastax.spark:spark-cassandra-connector_2.10:1.6.0-20-g4edacfb
[info] Reformatted 44 Scala sources {file:/usr/local/spark-cassandra-connector/}spark-cassandra-connector(test).
[info] Resolved com.datastax.spark:spark-cassandra-connector_2.10:1.6.0-20-g4edacfb dependencies
[info] Fetching artifacts of com.datastax.spark:spark-cassandra-connector_2.10:1.6.0-20-g4edacfb
[info] Reformatted 143 Scala sources {file:/usr/local/spark-cassandra-connector/}spark-cassandra-connector(compile).
[info] Fetched artifacts of com.datastax.spark:spark-cassandra-connector_2.10:1.6.0-20-g4edacfb
[error] 4 not found
[error] /.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar
[error] /.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar
[error] /.m2/repository/commons-httpclient/commons-httpclient/3.1/commons-httpclient-3.1.jar
[error] /.m2/repository/log4j/log4j/1.2.17/log4j-1.2.17.jar
java.lang.Exception: Encountered 4 errors (see above messages)
at coursier.Tasks$$anonfun$updateTask$1.coursier$Tasks$$anonfun$$report$1(Tasks.scala:710)
at coursier.Tasks$$anonfun$updateTask$1$$anonfun$apply$49.apply(Tasks.scala:748)
at coursier.Tasks$$anonfun$updateTask$1$$anonfun$apply$49.apply(Tasks.scala:748)
at scala.collection.mutable.MapLike$class.getOrElseUpdate(MapLike.scala:189)
at scala.collection.mutable.AbstractMap.getOrElseUpdate(Map.scala:91)
at coursier.Tasks$$anonfun$updateTask$1.apply(Tasks.scala:741)
at coursier.Tasks$$anonfun$updateTask$1.apply(Tasks.scala:517)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
at sbt.std.Transform$$anon$4.work(System.scala:63)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:226)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
at sbt.Execute.work(Execute.scala:235)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:226)
at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
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)
[error] (spark-cassandra-connector/*:update) java.lang.Exception: Encountered 4 errors (see above messages)
[error] Total time: 3 s, completed 19-Jul-2016 5:03:12 AM
我做错了什么？有人可以帮忙吗？
【问题讨论】：