小编Kri*_*tap的帖子

代码：

LivyClient client = null;
try
{
  String livyUrl = "http://dummy16814.zycus.net:8998";
  client = new LivyClientBuilder().setURI(new URI(livyUrl)).build();

  String piJar = "E:\\livy_old.jar";
  System.err.printf("Uploading %s to the Spark context...\n", piJar);
  client.uploadJar(new File(piJar)).get();

  int samples = 10;
  System.err.printf("Running PiJob with %d samples...\n", samples);

  double pi = client.submit(new PiJob()).get();
  System.out.println("Pi is roughly: " + pi);
}
finally
{
  client.stop(true);
}

上传jar时遇到异常

正在将E：\ livy_old.jar上载到Spark上下文...线程“主”中的异常java.util.concurrent.ExecutionException：java.io.IOException：错误的请求：“要求失败：本地路径/root/.livy-sessions /61a5e39c-d199-4bb8-967b-960b4e3e9ee3/livy_old.jar无法添加到用户会话。” 在java.util.concurrent.FutureTask.report（FutureTask.java:122）在java.util.concurrent.FutureTask.get（FutureTask.java:192）在com.zycus.spark.PiJob.main（PiJob.java:64） ）由以下原因引起：java.io.IOException：错误的请求：“请求失败：本地路径/root/.livy-sessions/61a5e39c-d199-4bb8-967b-960b4e3e9ee3/livy_old.jar无法添加到用户会话中。” com.cloudera.livy.client.http.LivyConnection上的com.cloudera.livy.client.http.LivyConnection.sendRequest（LivyConnection.java:197）处。