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[SPARK-4664][Core] Throw an exception when spark.akka.frameSize > 2047 #3527

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[SPARK-4664][Core] Throw an exception when spark.akka.frameSize > 2047 #3527

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9 changes: 8 additions & 1 deletion core/src/main/scala/org/apache/spark/util/AkkaUtils.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -134,9 +134,16 @@ private[spark] object AkkaUtils extends Logging {
Duration.create(conf.getLong("spark.akka.lookupTimeout", 30), "seconds")
}

private val AKKA_MAX_FRAME_SIZE_IN_MB = Int.MaxValue / 1024 / 1024

/** Returns the configured max frame size for Akka messages in bytes. */
def maxFrameSizeBytes(conf: SparkConf): Int = {
conf.getInt("spark.akka.frameSize", 10) * 1024 * 1024
val frameSizeInMB = conf.getInt("spark.akka.frameSize", 10)
if (frameSizeInMB > AKKA_MAX_FRAME_SIZE_IN_MB) {
throw new IllegalArgumentException("spark.akka.frameSize should not be greater than "
+ AKKA_MAX_FRAME_SIZE_IN_MB + "MB")
}
frameSizeInMB * 1024 * 1024
}

/** Space reserved for extra data in an Akka message besides serialized task or task result. */
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