org.apache.hadoop.hive.ql.hooks

Class VerifyNumReducersHook

java.lang.Object

org.apache.hadoop.hive.ql.hooks.VerifyNumReducersHook

All Implemented Interfaces:

ExecuteWithHookContext, Hook

public class VerifyNumReducersHook
extends java.lang.Object
implements ExecuteWithHookContext

VerifyNumReducersHook. Provided a query involves exactly 1 map reduce job, this hook can be used to verify that the number of reducers matches what is expected. Use the config VerifyNumReducersHook.num.reducers to specify the expected number of reducers.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	BUCKET_CONFIG

Constructor Summary

Constructors

Constructor and Description
VerifyNumReducersHook()

Method Summary

Modifier and Type	Method and Description
void	run(HookContext hookContext)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

BUCKET_CONFIG

public static final java.lang.String BUCKET_CONFIG

See Also:

Constant Field Values

Constructor Detail

VerifyNumReducersHook

public VerifyNumReducersHook()

Method Detail

run

public void run(HookContext hookContext)

Specified by:

run in interface ExecuteWithHookContext

Parameters:

hookContext - The hook context passed to each hooks.