java.lang.AssertionError: assertion failed

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java.lang.AssertionError: assertion failed
at scala.Predef$.assert(Predef.scala:165)
at org.apache.spark.deploy.yarn.ApplicationMaster.waitForSparkContextInitialized(ApplicationMaster.scala:223)
at org.apache.spark.deploy.yarn.ApplicationMaster.run(ApplicationMaster.scala:112)
at org.apache.spark.deploy.SparkHadoopUtil$$anon$1.run(SparkHadoopUtil.scala:53)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1554)
at org.apache.spark.deploy.yarn.ApplicationMaster$.main(ApplicationMaster.scala:469)

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