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 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

static String

BUCKET_CONFIG

Constructor Summary

VerifyNumReducersHook()

Method Summary

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 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.