My Spark Streaming job (running on Spark 1.0.2) stopped working today and consistently throws the exception below. No code changed for it, so I'm really puzzled about the cause of the issue. Looks like a security issue at HDFS level. Has anybody seen this exception and maybe know the root cause?
14/09/18 10:16:27 ERROR UserGroupInformation: PriviledgedActionException as:********** (auth:SIMPLE) cause:java.util.concurrent.TimeoutException: Futures timed out after [30 seconds] Exception in thread "main" java.lang.reflect.UndeclaredThrowableException: Unknown exception in doAs at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1421) at org.apache.spark.deploy.SparkHadoopUtil.runAsSparkUser(SparkHadoopUtil.scala:52) at org.apache.spark.executor.CoarseGrainedExecutorBackend$.run(CoarseGrainedExecutorBackend.scala:113) at org.apache.spark.executor.CoarseGrainedExecutorBackend$.main(CoarseGrainedExecutorBackend.scala:154) at org.apache.spark.executor.CoarseGrainedExecutorBackend.main(CoarseGrainedExecutorBackend.scala) Caused by: java.security.PrivilegedActionException: java.util.concurrent.TimeoutException: Futures timed out after [30 seconds] 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:1408) Any hints? -kr, Gerard.
