无法启动。/spark-shell

Question

我是第一次尝试在我的ubuntu机器上安装spark，当我尝试启动spark -shell时，我遇到了下面的错误

请帮帮忙

Caused by: org.apache.derby.iapi.error.StandardException: Directory    /home/amar/spark-2.2.0-bin-hadoop2.7/bin/metastore_db cannot be created.
at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
at    org.apache.derby.impl.services.monitor.StorageFactoryService$10.run(Unknown  Source)
at java.security.AccessController.doPrivileged(Native Method)
at  org.apache.derby.impl.services.monitor.StorageFactoryService.createServiceRoot(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.createPersistentService(Unknown Source)
at org.apache.derby.impl.services.monitor.FileMonitor.createPersistentService(Unknown Source)
at org.apache.derby.iapi.services.monitor.Monitor.createPersistentService(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection$5.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.derby.impl.jdbc.EmbedConnection.createPersistentService(Unknown Source)
... 149 more
<console>:14: error: not found: value spark
   import spark.implicits._
          ^
<console>:14: error: not found: value spark
   import spark.sql
          ^
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Answer 1

在我的例子中，问题出在权限上。我试图以非管理员用户的身份启动spark。一旦我以root身份开始，一切都很顺利。然而，我并不推荐这样的行为。只需指向检查权限并相应地设置即可。以root用户身份运行是一种糟糕的做法。