HMaster.InitializationMonitor (Apache HBase 1.2.12 API)

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Summary:
Nested |
Field |
Constr |
Method

Detail:
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Method

java.lang.Object
- org.apache.hadoop.hbase.util.HasThread
- - org.apache.hadoop.hbase.master.HMaster.InitializationMonitor

All Implemented Interfaces:

Runnable

Enclosing class:

HMaster
```
private static class HMaster.InitializationMonitor
extends HasThread
```
Protection against zombie master. Started once Master accepts active responsibility and starts taking over responsibilities. Allows a finite time window before giving up ownership.

Field Summary

Fields
Modifier and Type	Field and Description
`static boolean`	`HALT_DEFAULT`
`static String`	`HALT_KEY` When timeout expired and initialization has not complete, call `System.exit(int)` when true, do nothing otherwise.
`private boolean`	`haltOnTimeout`
`private HMaster`	`master`
`private long`	`timeout`
`static long`	`TIMEOUT_DEFAULT`
`static String`	`TIMEOUT_KEY` The amount of time in milliseconds to sleep before checking initialization status.

Constructor Summary

Constructors
Constructor and Description

HMaster.InitializationMonitor(HMaster master)
Creates a Thread that monitors the HMaster.isInitialized() state.

Method Summary

Methods
Modifier and Type Method and Description

void run()
- Methods inherited from class org.apache.hadoop.hbase.util.HasThread
  getName, getThread, interrupt, isAlive, isInterrupted, join, join, join, setDaemon, setName, setPriority, setUncaughtExceptionHandler, start
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - TIMEOUT_KEY
```
public static final String TIMEOUT_KEY
```
    The amount of time in milliseconds to sleep before checking initialization status.
    
    See Also:
    Constant Field Values
  - TIMEOUT_DEFAULT
```
public static final long TIMEOUT_DEFAULT
```
  - HALT_KEY
```
public static final String HALT_KEY
```
    When timeout expired and initialization has not complete, call System.exit(int) when true, do nothing otherwise.
    
    See Also:
    Constant Field Values
  - HALT_DEFAULT
```
public static final boolean HALT_DEFAULT
```
    See Also:
    Constant Field Values
  - master
```
private final HMaster master
```
  - timeout
```
private final long timeout
```
  - haltOnTimeout
```
private final boolean haltOnTimeout
```
- Constructor Detail
  - HMaster.InitializationMonitor
```
HMaster.InitializationMonitor(HMaster master)
```
    Creates a Thread that monitors the HMaster.isInitialized() state.
- Method Detail
  - run
```
public void run()
```
    Specified by:
    
    run in interface Runnable
    
    Specified by:
    
    run in class HasThread

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