我正在尝试在 CentOS 上安装 Spark。使用命令构建 sparksbt/sbt assembly时，会出现以下错误。
[warn] /root/spark-0.8.0-incubating/core/src/main/scala/org/apache/spark/SparkHadoopWriter.scala:129: method cleanupJob in class OutputCommitter is deprecated: see corresponding Javadoc for more information.
[warn] getOutputCommitter().cleanupJob(getJobContext())
[warn] ^
[warn] /root/spark-0.8.0-incubating/core/src/main/scala/org/apache/spark/rdd/PairRDDFunctions.scala:592: method cleanupJob in class OutputCommitter is deprecated: see corresponding Javadoc for more information.
[warn] jobCommitter.cleanupJob(jobTaskContext)
[warn] ^
[warn] two warnings found
[error] ----------
[error] 1. WARNING in /root/spark-0.8.0-incubating/core/src/main/java/org/apache/spark/network/netty/FileClient.java (at line 22)
[error] import io.netty.channel.ChannelFuture;
[error] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[error] The import io.netty.channel.ChannelFuture is never used
[error] ----------
[error] 2. WARNING in /root/spark-0.8.0-incubating/core/src/main/java/org/apache/spark/network/netty/FileClient.java (at line 23)
[error] import io.netty.channel.ChannelFutureListener;
[error] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[error] The import io.netty.channel.ChannelFutureListener is never used
[error] ----------
[error] ----------
[error] 3. WARNING in /root/spark-0.8.0-incubating/core/src/main/java/org/apache/spark/network/netty/FileServer.java (at line 23)
[error] import io.netty.channel.Channel;
[error] ^^^^^^^^^^^^^^^^^^^^^^^^
[error] The import io.netty.channel.Channel is never used
[error] ----------
[error] ----------
[error] 4. WARNING in /root/spark-0.8.0-incubating/core/src/main/scala/org/apache/spark/api/java/JavaSparkContextVarargsWorkaround.java (at line 20)
[error] import java.util.Arrays;
[error] ^^^^^^^^^^^^^^^^
[error] The import java.util.Arrays is never used
[error] ----------
[error] ----------
[error] 5. ERROR in /root/spark-0.8.0-incubating/core/src/main/scala/org/apache/spark/api/java/function/DoubleFlatMapFunction.java (at line 36)
[error] public final Iterable<Double> apply(T t) { return call(t); }
[error] ^^^^^^^^^^
[error] The method apply(T) of type DoubleFlatMapFunction<T> must override a superclass method
[error] ----------
[error] 5 problems (1 error, 4 warnings)
[error] (core/compile:compile) javac returned nonzero exit code
[error] Total time: 431 s, completed Oct 24, 2013 7:42:21 AM
我机器上安装的java版本是1.7.0_45。
早些时候我使用了 jdk 1.6.0_35，它给出了相同的错误集。我还尝试了 java 1.4，它给出了不同类型的错误。我应该使用哪个版本的 java？还是其他问题？