hddong commented on issue #25389: [SPARK-28657][CORE] Fix currentContext Instance failed sometimes URL: https://github.com/apache/spark/pull/25389#issuecomment-519737667 > Can you put more error stack detail? ``` 19/08/08 14:57:49 WARN CallerContext: Fail to set Spark caller context java.lang.ClassCastException: org.apache.hadoop.ipc.CallerContext$Builder cannot be cast to scala.runtime.Nothing$ at org.apache.spark.util.CallerContext.setCurrentContext(Utils.scala:3012) at org.apache.spark.deploy.yarn.Client.submitApplication(Client.scala:187) at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend.start(YarnClientSchedulerBackend.scala:60) at org.apache.spark.scheduler.TaskSchedulerImpl.start(TaskSchedulerImpl.scala:196) at org.apache.spark.SparkContext.<init>(SparkContext.scala:528) at org.apache.spark.SparkContext$.getOrCreate(SparkContext.scala:2516) at org.apache.spark.sql.SparkSession$Builder.$anonfun$getOrCreate$5(SparkSession.scala:946) at scala.Option.getOrElse(Option.scala:138) at org.apache.spark.sql.SparkSession$Builder.getOrCreate(SparkSession.scala:937) at org.apache.spark.sql.hive.thriftserver.SparkSQLEnv$.init(SparkSQLEnv.scala:49) at org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver.<init>(SparkSQLCLIDriver.scala:312) at org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver$.main(SparkSQLCLIDriver.scala:165) at org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver.main(SparkSQLCLIDriver.scala) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.spark.deploy.JavaMainApplication.start(SparkApplication.scala:52) at org.apache.spark.deploy.SparkSubmit.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:920) at org.apache.spark.deploy.SparkSubmit.doRunMain$1(SparkSubmit.scala:179) at org.apache.spark.deploy.SparkSubmit.submit(SparkSubmit.scala:202) at org.apache.spark.deploy.SparkSubmit.doSubmit(SparkSubmit.scala:89) at org.apache.spark.deploy.SparkSubmit$$anon$2.doSubmit(SparkSubmit.scala:999) at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:1008) at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala) ``` above is error stack I got
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