UnknownReason (Spark 2.3.0 JavaDoc)

```
public class UnknownReason
extends Object
```
We don't know why the task ended -- for example, because of a ClassNotFound exception when deserializing the task result.

Constructors
Constructor and Description
`UnknownReason()`

All Methods Static Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`abstract static boolean`	`canEqual(Object that)`
`static boolean`	`countTowardsTaskFailures()`
`abstract static boolean`	`equals(Object that)`
`abstract static int`	`productArity()`
`abstract static Object`	`productElement(int n)`
`static scala.collection.Iterator<Object>`	`productIterator()`
`static String`	`productPrefix()`
`static String`	`toErrorString()`

Methods inherited from class Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

public static boolean countTowardsTaskFailures()

public abstract static boolean canEqual(Object that)

public abstract static boolean equals(Object that)

public abstract static Object productElement(int n)

public abstract static int productArity()

public static scala.collection.Iterator<Object> productIterator()

Class UnknownReason